WO1996038190A1 - Automatic withdrawal of piston rod - Google Patents

Automatic withdrawal of piston rod Download PDF

Info

Publication number
WO1996038190A1
WO1996038190A1 PCT/DK1996/000236 DK9600236W WO9638190A1 WO 1996038190 A1 WO1996038190 A1 WO 1996038190A1 DK 9600236 W DK9600236 W DK 9600236W WO 9638190 A1 WO9638190 A1 WO 9638190A1
Authority
WO
WIPO (PCT)
Prior art keywords
lid
spindle
piston rod
cartridge
syringe
Prior art date
Application number
PCT/DK1996/000236
Other languages
French (fr)
Inventor
Lars Peter Klitmose
Original Assignee
Novo Nordisk A/S
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CA002222411A priority Critical patent/CA2222411C/en
Priority to AU58934/96A priority patent/AU705105B2/en
Application filed by Novo Nordisk A/S filed Critical Novo Nordisk A/S
Priority to MX9709306A priority patent/MX9709306A/en
Priority to HU9802676A priority patent/HU219757B/en
Priority to BR9608634A priority patent/BR9608634A/en
Priority to DE69621133T priority patent/DE69621133T2/en
Priority to RU98100106/14A priority patent/RU2173180C2/en
Priority to EP96916020A priority patent/EP0840628B1/en
Priority to JP53612096A priority patent/JP3802064B2/en
Priority to PL96323562A priority patent/PL181217B1/en
Priority to UA97125734A priority patent/UA42066C2/en
Priority to DK96916020T priority patent/DK0840628T3/en
Priority to US08/973,109 priority patent/US6045537A/en
Priority to AT96916020T priority patent/ATE217200T1/en
Publication of WO1996038190A1 publication Critical patent/WO1996038190A1/en
Priority to NO19975525A priority patent/NO313739B1/en

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M5/31583—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
    • A61M5/31586—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod performed by rotationally moving or pivoted actuator, e.g. an injection lever or handle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M2005/2403—Ampoule inserted into the ampoule holder
    • A61M2005/2414—Ampoule inserted into the ampoule holder from the side
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M2005/31518—Piston or piston-rod constructions, e.g. connection of piston with piston-rod designed to reduce the overall size of an injection device, e.g. using flexible or pivotally connected chain-like rod members
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
    • A61M5/31543—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change

Definitions

  • the invention relates to syringes for dosed injection of a medicine from an exchangeable cartridge of the kind having a piston which is forced into a tubular cartridge to press out a dose of medicine corresponding to the movement of the pis ⁇ ton, the syringe having a housing comprising a cartridge holder and a dosing mechanism by which a dose is set and sub ⁇ sequently injected by successively advancing a piston rod to press the piston into the cartridge, said dosing mechanism comprising a threaded spindle and a nut member co-operating with the spindle so that by setting of a dose relative rota ⁇ tion of the spindle and the nut member will move the nut member along the spindle, the position of the nut member on the spindle defining how far the piston rod is advanced during the injection, and the relative rotation of the spind ⁇ le and said nut member being locked to keep the nut member in its position on the spindle when the dosing mechanism is not operated to set a dose
  • the operation means only comprises a means for setting a dose and a means for injecting the set dose.
  • Disposable syringes only compri- sing these two kinds of means are known, but if it is wanted to have a syringe which does not infer that the dosing mecha ⁇ nism is disposed of each time a cartridge integrated in such a pen is empty, the .cartridge must be exchangeable. This infers that one more operation must be performed frequently as the cartridge must be changed when it is empty.
  • the medicine is pressed out of the cartridge by a piston which is pressed successively further into the tubular cartridge by the piston rod forming a part and the dosing mechanism.
  • the piston rod pro- jects into the cartridge in almost the total length thereof.
  • the piston rod must first be drawn out of the empty cartridge, and thereafter it must be brought back to its initial position in the dose setting part. The last operation is made possible by locks getting unlocked when the empty cartridge is removed from the syringe, whereafter the piston rod may be pushed or screwed back to its initial position.
  • a syringe of the kind mentioned in the opening of this specification which syringe is characterised in that access to the cartridge holder is obtained by opening a lid connected to the housing and coupled to the dosing me- chanism in such a way, that the locking of the nut element in its position on the spindle is released when the lid is opened .
  • the release of said locking may be obtained either by bringing the inner thread of the nut member out of engagement with the spindle or by allowing a free relative rotation of the nut member and the spindle.
  • the nut member which have during the injections performed been moved to a position on the spindle corresponding to a fully advanced piston rod, may be moved along the spindle back to its position corresponding to a totally retracted piston rod.
  • the opening movement of the lid may further be transmitted to a piston rod retraction mechanism so that the piston rod is automatically withdrawn from the car ⁇ tridge and the nut element is moved to its corresponding initial position when the lid is opened.
  • the lid may be a slideable lid which gives access to the cartridge holder by being slided in the axial direction of the syringe.
  • a piston rod retraction member may be rigidly connected to the lid and may engage means at the rear end of the piston rod to draw this piston rod and the nut member back to an initial position when the lid is slided in the axial direction of the syringe to give access to the cartridge holder.
  • the piston rod retraction member may be provided with means engaging the dosing mecha ⁇ nism to release the locking of the nut element in its position on the spindle during the initial part of the sliding move- ment of the lid to have access to the cartridge holder. In this way the cartridge holder is made ready to receive a new cartridge when the lid is slided away to give access to the cartridge holder.
  • the detent mechanism may comprise a finger on the lid, which finger resiliently engages a track in the syringe housing which track comprises a first and a second of parallel grooves so that the finger follows the first groove during the opening movement of the lid and the second groove during the closing movement of the lid, at least the first groove being provided with saw tooth detents which only allows the finger to be moved in the opening direction of the lid.
  • the detent mechanism may comprise a pawl mounted on a part rigidly connected to the lid and designed to engage a linear toothing in the housing, recesses being provided at each end of the toothing, which recesses allow the pawl to change its direction of detention.
  • the lid may be hinged to the syringe housing and the cartridge holder may follow the lid when swung out from the housing to give access to this cartridge holder from the front end thereof.
  • the piston rod must either be retracted from the cartridge holder before this holder is swung away from its axial direction in relation to the rest of the syringe, or the piston rod must be flexible to allow it to be deflected with the piston holder. In this case a used cartridge is pulled out from the end of the cartridge holder leaving the piston rod extending axially in the holder but with the locking of the nut member in its position on the spindle is released.
  • Figure 1 shows schematically a sectional view of a sy ⁇ ringe according to the invention with its lid closed and the cartridge empty ready for changing
  • Figure 2 shows in a reduced scale a 3-dimensional view of the part in figure 1
  • Figure 3 shows a view corresponding figure 1 with the lid partly opened
  • Figure 4 shows in a reduced scale a 3-dimensional view of the part in figure 3
  • Figure 5 shows a view corresponding to the views of fi- gure 1 and 3 with the lid fully opened
  • Figure 6 shows in a reduced scale a 3-dimensional view of the part in figure 5
  • Figure 7 shows schematically a view corresponding to the views in figure 1, 3, and 5 with the lid closed after a new cartridge has been loaded into the syringe
  • Figure 8 shows in a reduced scale a 3-dimensional view of the part in figure 7
  • the syringe comprises a housing 1 accommodating in a compart ⁇ ment a cartridge 2 from which a medicament may be forced out through a needle (not shown) mounted at a neck part 3 of the cartridge 2 at one end thereof.
  • the other end of the cartridge 2 is closed by a piston 4, and the medicament is forced out through the needle by forcing the piston 4 into the cartridge 2.
  • the piston 4 is pressed by a piston rod 5 having a foot 6 abutting against the outer end of the piston.
  • the piston rod is flexible and is deflected 180° at the end of the cartridge. Thereby it is made possible to place the dose setting device next to the car ⁇ tridge instead of in axial continuation of the cartridge as it is commonly seen.
  • the dose setting device is here schematically illustrated as a threaded spindle 7 which may be rotated by turning a knob 8 at one end of the spindle 7 the other end of which is rotatably guided in the piston rod which is hollow as it is made as a tight wound helix leaving a hole along its axis.
  • a nut 9 which is mounted in the housing 1 in a way making it unrotatable relative to the housing but displaceable in the longitudinal direction thereof, will move along the spindle 7.
  • the compartment accommodating the cartridge 2 is closed by a lid 11 which may be slided in the longitudinal direction of the syringe .
  • the lid 11 is connected to a connecting part 12 which is guided in an appropriate guideway in the housing 1 to ensure said longitudinal displacement in the direction towards the needle end of the cartridge 2.
  • the connecting part 12 is provided with a carrier part 13 extending perpendicularly to the connecting part 12 and sur ⁇ rounds the deflected end of the piston rod 5 by a free fit allowing the piston rod 5 but not its end cap 10 to pass through an opening in the carrier part 13.
  • the lid is slided in the distal direction of the syringe that is in the direction towards the needle mounting end of the car ⁇ tridge.
  • the syringe e. g. the conven ⁇ tional form having the cartridge and the dose setting part placed in axial continuation of each other, it may be appro- priate to have a lid which is slided in the proximal direction of the syringe.
  • the carrier part 13 of the connecting part grips behind the end cap 10 of the piston rod and pull this rod so that its end carrying the foot 6 is pulled out of the car ⁇ tridge.
  • the piston rod 5 will also be drawn totally out of the cartridge which may then be removed and replaced by a new full one without any interference with the piston rod 5.
  • the carrier part 13 may move the nut 9 along the spindle 7.
  • the nut may comprise two halves which moves away from each other to couple them free of the spindle unless they are kept together by an external pressure.
  • this external pressure may be pro ⁇ vided by the connecting part 12 abutting a locking part 14 of the nut.
  • Figure 3 shows the syringe at a status during the opening of the compartment in which the cartridge is accommodated.
  • the carrier part 13 is pulling the piston rod 5 out of the car- tridge and is at the same time displacing the nut 9 along the spindle 7 in a direction towards the knob 8 all concurrently with the sliding of the lid to a position leaving free access to the compartment over the full length of an cartridge.
  • Figure 5 shows this full opened position for the lid. Now the empty cartridge may be removed and a new cartridge may be inserted without any interference with the piston rod which is drawn fully out of the compartment with its foot 6 forming an end wall of this compartment.
  • the lid is slided back to its position closing this compartment.
  • the carrier part 13 will slide along the piston rod without carrying along neither this rod nor the nut 9 abutting the end cap 10 of the piston rod.
  • the recess 15 in surface of the connecting part 12 is moved past the locking part 14 of the nut 9 and this locking part will now abut the not recessed part of the surface and keep the nut 9 in engagement with the thread of the spindle 7.
  • Rotating the knob 8 in an appropriate direction will make the nut 9 move in a direction towards the end cap 10 of a first end of the piston rod 5 and this way force the se ⁇ cond end of this piston rod into the cartridge in the compart ⁇ ment to press out the liquid content of said cartridge through a not shown needle mounted at the neck part 3 of said cartridge.
  • the foot 6 through which the piston rod 5 influences the piston 4 is requested to be constantly abutting the piston 4 until the content of the cartridge is used and the cartridge is ready for changing.
  • a mechanism is provided which ensures that when the lid is partly opened, it cannot be closed again without first being fully opened. This way an unaware partly opening and closing is avoided.
  • the mentioned mechanism comprises a toothing 16 in the housing 1 which toothing collaborates with a pawl 17 mounted on the connecting part 12.
  • a toothing 16 in the housing 1 which toothing collaborates with a pawl 17 mounted on the connecting part 12.
  • the pawl may click along the toothing as long as an opening movement is performed but if attempt is made to slide the lid in the closing direction, the pawl will bar this movement as it is seen in figure 3.
  • the pawl When the lid is fully opened as shown in figure 5, the pawl will reach a recess 18 at an end of the toothing.
  • the lid is shown as a slidable one. Also a hinged lid could be used when an appropriate coupling is established be ⁇ tween the opening movement of the lid and the carrier moving the piston rod out of the cartridge.
  • the sy- ringe may be of a type having the dosing mechanism and the cartridge positioned end to end.

Abstract

A syringe for dosed injection of a medicine from an exchangeable cartridge has a housing comprising a cartridge holder and a dosing mechanism by which a dose is set and subsequently injected by successively advancing a piston rod to press a piston into the cartridge. The dosing mechanism comprises a threaded spindle and a nut member co-operating with the spindle. A dose is set by relative rotation of the spindle and nut member whereby the nut member is moved along the spindle. The position of the nut member on the spindle defines how far the piston rod is advanced. The spindle and the nut is locked against relative rotation when the dosing mechanism is not operated to set a dose. Access to the cartridge holder is obtained by opening a lid connected to the housing and coupled to the dosing mechanism in such a way that the locking of the nut element in its position on the spindle is released when the lid is opened, and the opening movement of the lid is transmitted to a piston rod retraction mechanism.

Description

Automatic Withdrawal of Piston Rod
The invention relates to syringes for dosed injection of a medicine from an exchangeable cartridge of the kind having a piston which is forced into a tubular cartridge to press out a dose of medicine corresponding to the movement of the pis¬ ton, the syringe having a housing comprising a cartridge holder and a dosing mechanism by which a dose is set and sub¬ sequently injected by successively advancing a piston rod to press the piston into the cartridge, said dosing mechanism comprising a threaded spindle and a nut member co-operating with the spindle so that by setting of a dose relative rota¬ tion of the spindle and the nut member will move the nut member along the spindle, the position of the nut member on the spindle defining how far the piston rod is advanced during the injection, and the relative rotation of the spind¬ le and said nut member being locked to keep the nut member in its position on the spindle when the dosing mechanism is not operated to set a dose.
To make a syringe as easy to handle as possible, the number of operation means should be minimized. Ideally the operation means only comprises a means for setting a dose and a means for injecting the set dose. Disposable syringes only compri- sing these two kinds of means are known, but if it is wanted to have a syringe which does not infer that the dosing mecha¬ nism is disposed of each time a cartridge integrated in such a pen is empty, the .cartridge must be exchangeable. This infers that one more operation must be performed frequently as the cartridge must be changed when it is empty.
This in itself should cause no more complications than the fact that a new disposable syringe must be taken into use when the previous one is empty. However the syringe must be screwed apart to open access to the used cartridge and screwed to¬ gether again when a new cartridge has been inserted. This is a mounting function by which care must be taken not to damage the threads by which the syringe is screwed apart and the screwing movement is difficult to perform when the tactile mo¬ tor function is reduced.
Further, the medicine is pressed out of the cartridge by a piston which is pressed successively further into the tubular cartridge by the piston rod forming a part and the dosing mechanism. When the cartridge is empty said piston rod pro- jects into the cartridge in almost the total length thereof. To change the cartridge the piston rod must first be drawn out of the empty cartridge, and thereafter it must be brought back to its initial position in the dose setting part. The last operation is made possible by locks getting unlocked when the empty cartridge is removed from the syringe, whereafter the piston rod may be pushed or screwed back to its initial position.
Although this retraction of the piston rod may seem to be simple, it infers a major risk for destroying the pen due to wrong handling as an attempt to press a piston rod which should have been screwed is just as destroying as screwing a piston rod which should have been pressed.
It is the object of the invention to provide a syringe in which a cartridge may be changed without having to perform screwing movements, without having to take the syringe to pieces, and without having to pay attention to the piston rod and its retraction.
This is obtained by a syringe of the kind mentioned in the opening of this specification which syringe is characterised in that access to the cartridge holder is obtained by opening a lid connected to the housing and coupled to the dosing me- chanism in such a way, that the locking of the nut element in its position on the spindle is released when the lid is opened .
The release of said locking may be obtained either by bringing the inner thread of the nut member out of engagement with the spindle or by allowing a free relative rotation of the nut member and the spindle. When the locking is released the nut member, which have during the injections performed been moved to a position on the spindle corresponding to a fully advanced piston rod, may be moved along the spindle back to its position corresponding to a totally retracted piston rod.
According to the invention the opening movement of the lid may further be transmitted to a piston rod retraction mechanism so that the piston rod is automatically withdrawn from the car¬ tridge and the nut element is moved to its corresponding initial position when the lid is opened.
Further according to the invention the lid may be a slideable lid which gives access to the cartridge holder by being slided in the axial direction of the syringe. A piston rod retraction member may be rigidly connected to the lid and may engage means at the rear end of the piston rod to draw this piston rod and the nut member back to an initial position when the lid is slided in the axial direction of the syringe to give access to the cartridge holder. The piston rod retraction member may be provided with means engaging the dosing mecha¬ nism to release the locking of the nut element in its position on the spindle during the initial part of the sliding move- ment of the lid to have access to the cartridge holder. In this way the cartridge holder is made ready to receive a new cartridge when the lid is slided away to give access to the cartridge holder.
However, as only partly opening of the lid immediately may result in a partly withdrawal of the piston rod, it may result in an imprecise dosing if the lid is partly opened and then closed again. It is therefore appropriate to provide a detent mechanism which prevents the lid from being closed unless it has been fully opened as it may be practised as a well established habit that the pen must be made ready for use in the same way as when a new cartridge is mounted every time the lid has been opened.
The detent mechanism may comprise a finger on the lid, which finger resiliently engages a track in the syringe housing which track comprises a first and a second of parallel grooves so that the finger follows the first groove during the opening movement of the lid and the second groove during the closing movement of the lid, at least the first groove being provided with saw tooth detents which only allows the finger to be moved in the opening direction of the lid.
In another embodiment the detent mechanism may comprise a pawl mounted on a part rigidly connected to the lid and designed to engage a linear toothing in the housing, recesses being provided at each end of the toothing, which recesses allow the pawl to change its direction of detention.
In an embodiment the lid may be hinged to the syringe housing and the cartridge holder may follow the lid when swung out from the housing to give access to this cartridge holder from the front end thereof. In this embodiment the piston rod must either be retracted from the cartridge holder before this holder is swung away from its axial direction in relation to the rest of the syringe, or the piston rod must be flexible to allow it to be deflected with the piston holder. In this case a used cartridge is pulled out from the end of the cartridge holder leaving the piston rod extending axially in the holder but with the locking of the nut member in its position on the spindle is released. When a new cartridge is inserted from the end of the cartridge holder with its piston foremost the piston rod will automatically be pressed back and will bring the nut element back to its initial position when the car¬ tridge is inserted . As the piston rod is surrounded by the cartridge holder, there is no risk that the user will try to screw it back.
In the following the invention is described in further details with references to the drawing, wherein
Figure 1 shows schematically a sectional view of a sy¬ ringe according to the invention with its lid closed and the cartridge empty ready for changing,
Figure 2 shows in a reduced scale a 3-dimensional view of the part in figure 1,
Figure 3 shows a view corresponding figure 1 with the lid partly opened,
Figure 4 shows in a reduced scale a 3-dimensional view of the part in figure 3,
Figure 5 shows a view corresponding to the views of fi- gure 1 and 3 with the lid fully opened,
Figure 6 shows in a reduced scale a 3-dimensional view of the part in figure 5,
Figure 7 shows schematically a view corresponding to the views in figure 1, 3, and 5 with the lid closed after a new cartridge has been loaded into the syringe, and
Figure 8 shows in a reduced scale a 3-dimensional view of the part in figure 7 The syringe comprises a housing 1 accommodating in a compart¬ ment a cartridge 2 from which a medicament may be forced out through a needle (not shown) mounted at a neck part 3 of the cartridge 2 at one end thereof. The other end of the cartridge 2 is closed by a piston 4, and the medicament is forced out through the needle by forcing the piston 4 into the cartridge 2. The piston 4 is pressed by a piston rod 5 having a foot 6 abutting against the outer end of the piston.
In the showed embodiment the piston rod is flexible and is deflected 180° at the end of the cartridge. Thereby it is made possible to place the dose setting device next to the car¬ tridge instead of in axial continuation of the cartridge as it is commonly seen.
The dose setting device is here schematically illustrated as a threaded spindle 7 which may be rotated by turning a knob 8 at one end of the spindle 7 the other end of which is rotatably guided in the piston rod which is hollow as it is made as a tight wound helix leaving a hole along its axis. When the spindle 7 is rotated a nut 9, which is mounted in the housing 1 in a way making it unrotatable relative to the housing but displaceable in the longitudinal direction thereof, will move along the spindle 7. When the nut 9 is moved towards the deflected end of the piston rod 5 it will press this end in and axial direction and this movement is transmitted through the deflected part of the piston rod, which is guided in a corresponding channel in the housing 1, to the other end of the piston rod 5 which will then force the piston 4 further into the cartridge 2. The piston rod end abutting the nut 9 is provided with an end cap 10 having a larger diameter than the piston rod 5.
The compartment accommodating the cartridge 2 is closed by a lid 11 which may be slided in the longitudinal direction of the syringe .
The lid 11 is connected to a connecting part 12 which is guided in an appropriate guideway in the housing 1 to ensure said longitudinal displacement in the direction towards the needle end of the cartridge 2. At its end opposite said needle end the connecting part 12 is provided with a carrier part 13 extending perpendicularly to the connecting part 12 and sur¬ rounds the deflected end of the piston rod 5 by a free fit allowing the piston rod 5 but not its end cap 10 to pass through an opening in the carrier part 13.
When the cartridge is empty as in figure 1, it have to be changed by a full one. To do this by the shown embodiment the lid is slided in the distal direction of the syringe that is in the direction towards the needle mounting end of the car¬ tridge. By other embodiments of the syringe, e. g. the conven¬ tional form having the cartridge and the dose setting part placed in axial continuation of each other, it may be appro- priate to have a lid which is slided in the proximal direction of the syringe.
When the lid is displaced to open the cartridge accommodating compartment the carrier part 13 of the connecting part grips behind the end cap 10 of the piston rod and pull this rod so that its end carrying the foot 6 is pulled out of the car¬ tridge. When the compartment is opened totally, the piston rod 5 will also be drawn totally out of the cartridge which may then be removed and replaced by a new full one without any interference with the piston rod 5.
However, precautions have to be taken to make it possible to the carrier part 13 to move the nut 9 along the spindle 7. This is obtained by using a nut which is engaging the spindle in a releasable way. E.g. the nut may comprise two halves which moves away from each other to couple them free of the spindle unless they are kept together by an external pressure. In the schematic drawing this external pressure may be pro¬ vided by the connecting part 12 abutting a locking part 14 of the nut. During the very first part of the sliding movement of the lid and the connecting part a recess 15 in the surface en¬ gaging the locking part 14 of the nut 9 is brought to a posi¬ tion abreast of the locking part 14 and consequently the engagement between the nut 9 and the spindle 7 is released and the nut may freely be moved along the spindle when the piston rod 5 is pulled back by the carrier part 13.
Figure 3 shows the syringe at a status during the opening of the compartment in which the cartridge is accommodated. The carrier part 13 is pulling the piston rod 5 out of the car- tridge and is at the same time displacing the nut 9 along the spindle 7 in a direction towards the knob 8 all concurrently with the sliding of the lid to a position leaving free access to the compartment over the full length of an cartridge.
Figure 5 shows this full opened position for the lid. Now the empty cartridge may be removed and a new cartridge may be inserted without any interference with the piston rod which is drawn fully out of the compartment with its foot 6 forming an end wall of this compartment.
After a new cartridge has been placed in the compartment, the lid is slided back to its position closing this compartment. During the closing movement of the lid and its connecting part the carrier part 13 will slide along the piston rod without carrying along neither this rod nor the nut 9 abutting the end cap 10 of the piston rod. Very early during the closing movement of the lid the recess 15 in surface of the connecting part 12 is moved past the locking part 14 of the nut 9 and this locking part will now abut the not recessed part of the surface and keep the nut 9 in engagement with the thread of the spindle 7. Rotating the knob 8 in an appropriate direction will make the nut 9 move in a direction towards the end cap 10 of a first end of the piston rod 5 and this way force the se¬ cond end of this piston rod into the cartridge in the compart¬ ment to press out the liquid content of said cartridge through a not shown needle mounted at the neck part 3 of said cartridge.
When a new cartridge is taken into use, the foot 6 through which the piston rod 5 influences the piston 4 is requested to be constantly abutting the piston 4 until the content of the cartridge is used and the cartridge is ready for changing. To avoid that the foot 6 of the piston rod is drawn partly back due to the lid being partly opened and thereafter closed again a mechanism is provided which ensures that when the lid is partly opened, it cannot be closed again without first being fully opened. This way an unaware partly opening and closing is avoided.
The mentioned mechanism comprises a toothing 16 in the housing 1 which toothing collaborates with a pawl 17 mounted on the connecting part 12. When an opening of the lid is initiated the pawl may click along the toothing as long as an opening movement is performed but if attempt is made to slide the lid in the closing direction, the pawl will bar this movement as it is seen in figure 3. When the lid is fully opened as shown in figure 5, the pawl will reach a recess 18 at an end of the toothing. This recess will allow the pawl to change is direc¬ tion of blocking so that when a closing movement is initiated a renewed opening movement may only be initiated after the lid has been fully closed as the pawl now will block any movement in the opening direction until the pawl may turn its direction of blocking by entering a recess 19 at the other end of the toothing as is the case in figure 1 and 7. A not shown spring tends to force the pawl to a position perpendicular to the toothing. 10
In the above description the engagement between nut and spind¬ le is described as releasable. Another way to make it possible to displace the nut along the spindle is to give the thread a pitch so that it is not self blocking i.e. so that the spindle will rotate when the nut is by force displaced along the spindle. The locking function released when an opening of the lid is initiated must then be provided by a lock preventing the spindle from rotating inadvertently during the use of the syringe.
Further the lid is shown as a slidable one. Also a hinged lid could be used when an appropriate coupling is established be¬ tween the opening movement of the lid and the carrier moving the piston rod out of the cartridge. As mentioned also the sy- ringe may be of a type having the dosing mechanism and the cartridge positioned end to end.

Claims

Claims
1. A syringe for dosed injection of a medicine from an ex¬ changeable cartridge of the kind having a piston which is forced into a tubular cartridge to press out a dose of me¬ dicine corresponding to the movement of the piston, the sy¬ ringe having a housing comprising a cartridge holder and a dosing mechanism by which a dose is set and subsequently injected by successively advancing a piston rod to press the piston into the cartridge, said dosing mechanism comprising a threaded spindle and a nut member co-operating with the spindle so that by setting of a dose relative rotation of the spindle and the nut member will move the nut member along the spindle, the position of the nut member on the spindle defi- ning how far the piston rod is advanced during the injection, and the relative rotation of the spindle and said nut member being locked to keep the nut member in its position on the spindle when the dosing mechanism is not operated to set a dose, characterised in that access to the cartridge holder is obtained by opening a lid connected to the housing and coupled to the dosing mechanism in such a way, that the locking of the nut element in its position on the spindle is released when the lid is opened.
2. A syringe according to claim 1, characterised in that the opening movement of the lid is transmitted to a piston rod retraction mechanism.
3. A syringe according to claim 1 or 2 characterised in that the lid is a slidable lid which gives access to the cartridge holder by being slided in the axial direction of the syringe.
4. A syringe according to claim 3 characterised in that a piston rod retraction member is rigidly connected to the lid and engages means at the rear end of the piston rod to draw this piston rod back into the dosing mechanism when the lid is slided in the axial direction of the syringe to give access to the cartridge holder.
5. A syringe according to claim 4, characterised in that the piston rod retraction member is provided with means engaging the dosing mechanism to release the locking of the nut ele¬ ment in its position on the spindle during the initial part of the sliding movement of the lid to have access to the car¬ tridge holder.
6. Syringe according to claim 4 or 5, characterised in that the lid is provided with a detent mechanism which prevents the lid from being closed unless it has been fully opened.
7. Syringe according to claim 6, characterised in that the detent mechanism comprises a finger on the lid which finger resiliently engages a track in the syringe housing which track comprises a first and a second of parallel grooves so that the finger follows the first groove during the opening movement of the lid and the second groove during the closing movement of the lid, at least the first groove being provided with saw tooth detents which only allows the finger to be moved in the opening direction of the lid.
8. A syringe according to claim 6, characterised in that the detent mechanism comprises a pawl mounted on a part rigidly connected to the lid and designed to engage a linear toothing in the housing, recesses being provided at each end of the toothing, which recesses allow the pawl to change its direc¬ tion of detention.
9. A syringe according to claim 1, characterised in that the lid is hinged to a syringe housing and the cartridge holder follows the lid when swung out from the housing to give access to this cartridge holder from the front end thereof.
PCT/DK1996/000236 1995-06-02 1996-06-03 Automatic withdrawal of piston rod WO1996038190A1 (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
JP53612096A JP3802064B2 (en) 1995-06-02 1996-06-03 Automatic retracting piston rod
EP96916020A EP0840628B1 (en) 1995-06-02 1996-06-03 Automatic withdrawal of piston rod
MX9709306A MX9709306A (en) 1995-06-02 1996-06-03 Automatic withdrawal of piston rod.
AU58934/96A AU705105B2 (en) 1995-06-02 1996-06-03 Automatic withdrawal of piston rod
BR9608634A BR9608634A (en) 1995-06-02 1996-06-03 Syringe for injection
DE69621133T DE69621133T2 (en) 1995-06-02 1996-06-03 AUTOMATIC PISTON RETREAT
PL96323562A PL181217B1 (en) 1995-06-02 1996-06-03 Method of causing automatic retraction of piston rod
CA002222411A CA2222411C (en) 1995-06-02 1996-06-03 A syringe with an exchangeable cartridge
HU9802676A HU219757B (en) 1995-06-02 1996-06-03 Automatic withdrawal of piston rod
RU98100106/14A RU2173180C2 (en) 1995-06-02 1996-06-03 Automatic remover of piston rod
UA97125734A UA42066C2 (en) 1995-06-02 1996-06-03 Syringe for metered injections of drug
DK96916020T DK0840628T3 (en) 1995-06-02 1996-06-03 Automatic piston rod retraction
US08/973,109 US6045537A (en) 1995-06-02 1996-06-03 Syringe with automatically withdrawable of piston rod
AT96916020T ATE217200T1 (en) 1995-06-02 1996-06-03 AUTOMATIC PISTON ROD RETRACT
NO19975525A NO313739B1 (en) 1995-06-02 1997-12-01 Syringe for dosed injection of a medicine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK0625/95 1995-06-02
DK62595 1995-06-02

Publications (1)

Publication Number Publication Date
WO1996038190A1 true WO1996038190A1 (en) 1996-12-05

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ID=8095702

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1996/000236 WO1996038190A1 (en) 1995-06-02 1996-06-03 Automatic withdrawal of piston rod

Country Status (21)

Country Link
US (1) US6045537A (en)
EP (1) EP0840628B1 (en)
JP (1) JP3802064B2 (en)
KR (1) KR100427750B1 (en)
CN (1) CN1124861C (en)
AT (1) ATE217200T1 (en)
AU (1) AU705105B2 (en)
BR (1) BR9608634A (en)
CA (1) CA2222411C (en)
CZ (1) CZ288961B6 (en)
DE (1) DE69621133T2 (en)
DK (1) DK0840628T3 (en)
ES (1) ES2176457T3 (en)
HU (1) HU219757B (en)
MX (1) MX9709306A (en)
NO (1) NO313739B1 (en)
PL (1) PL181217B1 (en)
PT (1) PT840628E (en)
RU (1) RU2173180C2 (en)
UA (1) UA42066C2 (en)
WO (1) WO1996038190A1 (en)

Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5947934A (en) * 1996-09-13 1999-09-07 Novo Nordisk A/S Dose display for an injection syringe
WO2001023020A2 (en) * 1999-09-29 2001-04-05 Sterling Medivations, Inc. Reusable medication delivery device
US6482186B1 (en) 1999-09-29 2002-11-19 Sterling Medivations, Inc. Reusable medication delivery device
US6659982B2 (en) 2000-05-08 2003-12-09 Sterling Medivations, Inc. Micro infusion drug delivery device
EP1280575B1 (en) * 2000-05-04 2008-12-17 Novo Nordisk A/S Method of assembling an injection device comprising a preasssembled dose setting and injection mechanism
US8052645B2 (en) 2008-07-23 2011-11-08 Avant Medical Corp. System and method for an injection using a syringe needle
US8177749B2 (en) 2008-05-20 2012-05-15 Avant Medical Corp. Cassette for a hidden injection needle
US8900204B2 (en) 2006-05-16 2014-12-02 Novo Nordisk A/S Gearing mechanism for an injection device
US9022991B2 (en) 2000-06-16 2015-05-05 Novo Nordisk A/S Injection device
US9028454B2 (en) 2003-03-03 2015-05-12 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US9192727B2 (en) 2006-05-18 2015-11-24 Novo Nordisk A/S Injection device with mode locking means
US9205197B2 (en) 2003-03-03 2015-12-08 Sanofi-Aventis Deutschland Gmbh Drug delivery device dose setting mechanism
US9265893B2 (en) 2007-02-05 2016-02-23 Novo Nordisk A/S Injection button
US9533106B2 (en) 2011-12-29 2017-01-03 Novo Nordisk A/S Torsion-spring based wind-up auto injector pen with dial-up/dial-down mechanism
USRE46363E1 (en) 2004-10-21 2017-04-11 Novo Nordisk A/S Dial-down mechanism for wind-up pen
WO2017066885A1 (en) * 2015-10-19 2017-04-27 Tecpharma Licensing Ag Device for administering an active substance and method for operating said device
US9672328B2 (en) 2014-07-10 2017-06-06 Companion Medical, Inc. Medicine administering system including injection pen and companion device
US9974904B2 (en) 2008-05-20 2018-05-22 Avant Medical Corp. Autoinjector system
US10092706B2 (en) 2011-04-20 2018-10-09 Amgen Inc. Autoinjector apparatus
US10092703B2 (en) 2013-03-15 2018-10-09 Amgen Inc. Drug cassette, autoinjector, and autoinjector system
US10492990B2 (en) 2013-03-15 2019-12-03 Amgen Inc. Drug cassette, autoinjector, and autoinjector system
USD893020S1 (en) 2018-05-11 2020-08-11 Companion Medical, Inc. Injection pen
USD892819S1 (en) 2018-06-20 2020-08-11 Companion Medical, Inc. Display screen with graphical user interface
US10754927B2 (en) 2013-09-26 2020-08-25 Companion Medical, Inc. System for administering a medicament
USD898908S1 (en) 2012-04-20 2020-10-13 Amgen Inc. Pharmaceutical product cassette for an injection device
US10850036B2 (en) 2015-08-27 2020-12-01 E3D Agricultural Cooperative Association Reusable automatic injection device
US10864327B2 (en) 2016-01-29 2020-12-15 Companion Medical, Inc. Automatic medication delivery tracking
US10898653B2 (en) 2018-05-08 2021-01-26 Companion Medical, Inc. Intelligent medication delivery systems and methods for dose setting and dispensing monitoring
US11318191B2 (en) 2020-02-18 2022-05-03 Novo Nordisk A/S GLP-1 compositions and uses thereof
US11383043B2 (en) 2017-12-12 2022-07-12 Bigfoot Biomedical, Inc. Medicine injection and disease management systems, devices, and methods
US11464459B2 (en) 2017-12-12 2022-10-11 Bigfoot Biomedical, Inc. User interface for diabetes management systems including flash glucose monitor
US11484657B2 (en) 2017-06-09 2022-11-01 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods
US11568975B2 (en) 2017-10-12 2023-01-31 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods for dose recommendation and management
US11587663B2 (en) 2018-06-20 2023-02-21 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods for medicine dose calculation and reporting
US11664107B2 (en) 2018-05-08 2023-05-30 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods using a prescription-regulated software application
US11701473B2 (en) 2021-06-23 2023-07-18 Medtronic Minimed, Inc. Reusable injection pens
US11752198B2 (en) 2017-08-24 2023-09-12 Novo Nordisk A/S GLP-1 compositions and uses thereof
US11844923B2 (en) 2017-12-12 2023-12-19 Bigfoot Biomedical, Inc. Devices, systems, and methods for estimating active medication from injections
US11865306B2 (en) 2014-02-10 2024-01-09 E3D A.C.A.L Ltd Semi disposable auto injector
US11896797B2 (en) 2017-12-12 2024-02-13 Bigfoot Biomedical, Inc. Pen cap for insulin injection pens and associated methods and systems
US11931549B2 (en) 2017-12-12 2024-03-19 Bigfoot Biomedical, Inc. User interface for diabetes management systems and devices
US11948671B2 (en) 2019-04-11 2024-04-02 Medtronic Minimed, Inc. Intelligent accessories for medicine dispensing device
US11957884B2 (en) 2021-07-29 2024-04-16 Bigfoot Biomedical, Inc. Insulin injection assistance systems, methods, and devices

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW523415B (en) 2000-03-24 2003-03-11 Novo Nordisk As A flexible piston rod
US6699234B2 (en) 2001-03-16 2004-03-02 Show-Way Yeh Light, thin, and flexible medication infusion apparatuses attachable to user's skin
GB0107608D0 (en) * 2001-03-27 2001-05-16 Dca Design Int Ltd Improvements in and relating to an injection device
GB0107600D0 (en) * 2001-03-27 2001-05-16 Dca Design Int Ltd Improvements in and relating to an injection device
WO2004009160A1 (en) * 2002-07-24 2004-01-29 M 2 Medical A/S An infusion pump system, an infusion pump unit and an infusion pump
US20050160858A1 (en) * 2002-07-24 2005-07-28 M 2 Medical A/S Shape memory alloy actuator
JP2006504476A (en) 2002-11-05 2006-02-09 エム２・メディカル・アクティーゼルスカブ Disposable, wearable insulin administration device, combination of the device and program control device, and operation control method of the device
US7175897B2 (en) * 2002-12-17 2007-02-13 Avery Dennison Corporation Adhesive articles which contain at least one hydrophilic or hydrophobic layer, method for making and uses for same
EP1583573B1 (en) * 2002-12-23 2011-02-16 Asante Solutions, Inc. Flexible piston rod
EP1583571B1 (en) 2002-12-23 2008-02-13 M2 Medical A/S Medical dispensing device for insulin
WO2005072794A2 (en) * 2004-01-29 2005-08-11 M 2 Medical A/S Disposable medicine dispensing device
PL1715904T3 (en) * 2004-02-18 2016-01-29 Ares Trading Sa Hand-held electronically controlled injection device for injecting liquid medications
EP1877115A1 (en) 2005-04-06 2008-01-16 M 2 Medical A/S An actuator
ES1060690Y (en) 2005-07-05 2006-02-01 Prieto Carracedo Jose Luis INJECTOR DEVICE FOR SYRINGES
US7534226B2 (en) 2005-09-26 2009-05-19 M2 Group Holdings, Inc. Dispensing fluid from an infusion pump system
US8551046B2 (en) 2006-09-18 2013-10-08 Asante Solutions, Inc. Dispensing fluid from an infusion pump system
US8057436B2 (en) 2005-09-26 2011-11-15 Asante Solutions, Inc. Dispensing fluid from an infusion pump system
US8105279B2 (en) 2005-09-26 2012-01-31 M2 Group Holdings, Inc. Dispensing fluid from an infusion pump system
EP1933902B1 (en) * 2005-09-26 2014-12-17 Asante Solutions, Inc. Infusion pump with a drive having a ratchet and pawl combination
US8409142B2 (en) 2005-09-26 2013-04-02 Asante Solutions, Inc. Operating an infusion pump system
WO2007056592A2 (en) 2005-11-08 2007-05-18 M2 Medical A/S Method and system for manual and autonomous control of an infusion pump
US8475408B2 (en) * 2005-11-08 2013-07-02 Asante Solutions, Inc. Infusion pump system
US20090198183A1 (en) * 2006-11-03 2009-08-06 Krumme John F Apparatus and methods for injecting dermal fillers
DE102007018696A1 (en) * 2007-04-18 2008-10-23 Sanofi-Aventis Deutschland Gmbh Injection device for dispensing a medicament
US7981102B2 (en) 2007-05-21 2011-07-19 Asante Solutions, Inc. Removable controller for an infusion pump
US7833196B2 (en) * 2007-05-21 2010-11-16 Asante Solutions, Inc. Illumination instrument for an infusion pump
US7892199B2 (en) * 2007-05-21 2011-02-22 Asante Solutions, Inc. Occlusion sensing for an infusion pump
US7794426B2 (en) * 2007-05-21 2010-09-14 Asante Solutions, Inc. Infusion pump system with contamination-resistant features
US7717903B2 (en) 2007-09-06 2010-05-18 M2 Group Holdings, Inc. Operating an infusion pump system
US7828528B2 (en) 2007-09-06 2010-11-09 Asante Solutions, Inc. Occlusion sensing system for infusion pumps
US8032226B2 (en) 2007-09-07 2011-10-04 Asante Solutions, Inc. User profile backup system for an infusion pump device
US7879026B2 (en) 2007-09-07 2011-02-01 Asante Solutions, Inc. Controlled adjustment of medicine dispensation from an infusion pump device
US8287514B2 (en) 2007-09-07 2012-10-16 Asante Solutions, Inc. Power management techniques for an infusion pump system
US7935076B2 (en) 2007-09-07 2011-05-03 Asante Solutions, Inc. Activity sensing techniques for an infusion pump system
US7959598B2 (en) 2008-08-20 2011-06-14 Asante Solutions, Inc. Infusion pump systems and methods
CA2769030C (en) 2009-07-30 2016-05-10 Tandem Diabetes Care, Inc. Infusion pump system with disposable cartridge having pressure venting and pressure feedback
USD669165S1 (en) 2010-05-27 2012-10-16 Asante Solutions, Inc. Infusion pump
US10188801B2 (en) * 2010-08-13 2019-01-29 Sanofi-Aventis Deutschland Gmbh Mechanism for preventing selection of a dose
US8852152B2 (en) 2011-02-09 2014-10-07 Asante Solutions, Inc. Infusion pump systems and methods
US8454581B2 (en) 2011-03-16 2013-06-04 Asante Solutions, Inc. Infusion pump systems and methods
US20130085349A1 (en) 2011-06-21 2013-04-04 Yofimeter, Llc Analyte testing devices
US8333716B1 (en) 2011-06-21 2012-12-18 Yofimeter, Llc Methods for using an analyte testing device
US8585657B2 (en) 2011-06-21 2013-11-19 Asante Solutions, Inc. Dispensing fluid from an infusion pump system
US9289556B2 (en) 2011-09-30 2016-03-22 Becton Dickinson France, S.A.S. Syringe with plunger rod having a flexible portion
US9180242B2 (en) 2012-05-17 2015-11-10 Tandem Diabetes Care, Inc. Methods and devices for multiple fluid transfer
EP2862588B1 (en) 2012-06-13 2018-09-19 PHC Holdings Corporation Drug injection device
US20140163521A1 (en) * 2012-12-12 2014-06-12 Animas Corporation Medical infusion pump mechanism
US9173998B2 (en) 2013-03-14 2015-11-03 Tandem Diabetes Care, Inc. System and method for detecting occlusions in an infusion pump
DK2983763T3 (en) * 2013-04-10 2017-08-28 Sanofi Sa DRIVING MECHANISM FOR A PHARMACEUTICAL SUPPLY DEVICE
US9561324B2 (en) 2013-07-19 2017-02-07 Bigfoot Biomedical, Inc. Infusion pump system and method
US10569015B2 (en) 2013-12-02 2020-02-25 Bigfoot Biomedical, Inc. Infusion pump system and method
USD959694S1 (en) * 2015-04-01 2022-08-02 Novartis Ag Container for pharmaceuticals
US9878097B2 (en) 2015-04-29 2018-01-30 Bigfoot Biomedical, Inc. Operating an infusion pump system
US10987468B2 (en) 2016-01-05 2021-04-27 Bigfoot Biomedical, Inc. Operating multi-modal medicine delivery systems
US10449294B1 (en) 2016-01-05 2019-10-22 Bigfoot Biomedical, Inc. Operating an infusion pump system
USD809134S1 (en) 2016-03-10 2018-01-30 Bigfoot Biomedical, Inc. Infusion pump assembly
US10426896B2 (en) 2016-09-27 2019-10-01 Bigfoot Biomedical, Inc. Medicine injection and disease management systems, devices, and methods
USD836769S1 (en) 2016-12-12 2018-12-25 Bigfoot Biomedical, Inc. Insulin delivery controller
CA3037432A1 (en) 2016-12-12 2018-06-21 Bigfoot Biomedical, Inc. Alarms and alerts for medication delivery devices and related systems and methods
USD839294S1 (en) 2017-06-16 2019-01-29 Bigfoot Biomedical, Inc. Display screen with graphical user interface for closed-loop medication delivery
US11389088B2 (en) 2017-07-13 2022-07-19 Bigfoot Biomedical, Inc. Multi-scale display of blood glucose information

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064858A1 (en) * 1981-05-07 1982-11-17 Merck & Co. Inc. Dose adjustable delivery system for semi-solid medicaments
DE4419235A1 (en) * 1994-06-01 1995-12-07 Thomas Braeger Injection syringe

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU29311A1 (en) * 1932-01-28 1933-02-28 М.Т. Баранов Piston apparatus for the introduction of toxic substances with doses into the burrows of animals - agricultural pests
US3110310A (en) * 1961-07-20 1963-11-12 Ideal Instr & Mfg Co Inc Metering hypodermic syringe
US4430079A (en) * 1978-11-08 1984-02-07 Minnesota Mining And Manufacturing Company Fluid dispensing device
US4749109A (en) * 1983-11-15 1988-06-07 Kamen Dean L Volumetric pump with replaceable reservoir assembly
JP2717808B2 (en) * 1988-08-10 1998-02-25 テルモ株式会社 Syringe pump
FR2642786B1 (en) * 1989-02-07 1991-05-10 Europ Agence Spatiale LINEAR OR CIRCULAR LOCKING DEVICE, OF THE SAID RATCHET TYPE, SELF-LOCKING AND WITH AUTOMATIC RELEASE
SU1757681A1 (en) * 1990-01-04 1992-08-30 Е.В.Кузнецова и С.Г.Кузнецов Single use syringe
US5637095A (en) * 1995-01-13 1997-06-10 Minimed Inc. Medication infusion pump with flexible drive plunger

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064858A1 (en) * 1981-05-07 1982-11-17 Merck & Co. Inc. Dose adjustable delivery system for semi-solid medicaments
DE4419235A1 (en) * 1994-06-01 1995-12-07 Thomas Braeger Injection syringe

Cited By (86)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5947934A (en) * 1996-09-13 1999-09-07 Novo Nordisk A/S Dose display for an injection syringe
WO2001023020A2 (en) * 1999-09-29 2001-04-05 Sterling Medivations, Inc. Reusable medication delivery device
WO2001023020A3 (en) * 1999-09-29 2002-01-10 Sterling Medivations Inc Reusable medication delivery device
US6482186B1 (en) 1999-09-29 2002-11-19 Sterling Medivations, Inc. Reusable medication delivery device
EP1280575B1 (en) * 2000-05-04 2008-12-17 Novo Nordisk A/S Method of assembling an injection device comprising a preasssembled dose setting and injection mechanism
US6659982B2 (en) 2000-05-08 2003-12-09 Sterling Medivations, Inc. Micro infusion drug delivery device
US9022991B2 (en) 2000-06-16 2015-05-05 Novo Nordisk A/S Injection device
US10245383B2 (en) 2000-06-16 2019-04-02 Novo Nordisk A/S Injection device
US9623190B2 (en) 2003-03-03 2017-04-18 Sanofi-Aventis Deutschland Gmbh Pen-type injector
US9610409B2 (en) 2003-03-03 2017-04-04 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US9028454B2 (en) 2003-03-03 2015-05-12 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US9827379B2 (en) 2003-03-03 2017-11-28 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US9205197B2 (en) 2003-03-03 2015-12-08 Sanofi-Aventis Deutschland Gmbh Drug delivery device dose setting mechanism
US9775954B2 (en) 2003-03-03 2017-10-03 Sanofi-Aventis Deutschland Gmbh Pen-type injector
US9533105B2 (en) 2003-03-03 2017-01-03 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US10821231B2 (en) 2003-03-03 2020-11-03 Sanofi-Aventis Deutschland Gmbh Pen-type injector
US9561331B2 (en) 2003-03-03 2017-02-07 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US9604009B2 (en) 2003-03-03 2017-03-28 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US9604008B2 (en) 2003-03-03 2017-03-28 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US11554217B2 (en) 2003-03-03 2023-01-17 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US10729855B2 (en) 2003-03-03 2020-08-04 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US11197959B2 (en) 2003-03-03 2021-12-14 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US10653841B2 (en) 2003-03-03 2020-05-19 Sanofi-Aventis Deutschland Gmbh Drive mechanisms suitable for use in drug delivery devices
US9623189B2 (en) 2003-03-03 2017-04-18 Sanofi-Aventis Deutschland Gmbh Relating to drive mechanisms suitable for use in drug delivery devices
US11160928B2 (en) 2003-03-03 2021-11-02 Sanofi-Aventis Deutschland Gmbh Pen-type injector
USRE46363E1 (en) 2004-10-21 2017-04-11 Novo Nordisk A/S Dial-down mechanism for wind-up pen
US8900204B2 (en) 2006-05-16 2014-12-02 Novo Nordisk A/S Gearing mechanism for an injection device
US9192727B2 (en) 2006-05-18 2015-11-24 Novo Nordisk A/S Injection device with mode locking means
US9265893B2 (en) 2007-02-05 2016-02-23 Novo Nordisk A/S Injection button
US8177749B2 (en) 2008-05-20 2012-05-15 Avant Medical Corp. Cassette for a hidden injection needle
US11883633B2 (en) 2008-05-20 2024-01-30 Avant Medical Corp. Autoinjector system
US10792426B2 (en) 2008-05-20 2020-10-06 Avant Medical Corp. Autoinjector system
US10864324B2 (en) 2008-05-20 2020-12-15 Avant Medical Corp. Autoinjector system
US9925336B2 (en) 2008-05-20 2018-03-27 Avant Medical Corp. Cassette for a hidden injection needle
US9974904B2 (en) 2008-05-20 2018-05-22 Avant Medical Corp. Autoinjector system
US10639422B2 (en) 2008-07-23 2020-05-05 Avant Medical Corp. System and method for an injection using a syringe needle
US11724032B2 (en) 2008-07-23 2023-08-15 Avant Medical Corp. System and method for an injection using a syringe needle
US9616173B2 (en) 2008-07-23 2017-04-11 Avant Medical Corporation System and method for an injection using a syringe needle
US8052645B2 (en) 2008-07-23 2011-11-08 Avant Medical Corp. System and method for an injection using a syringe needle
US10918805B2 (en) 2011-04-20 2021-02-16 Amgen Inc. Autoinjector apparatus
US11419990B2 (en) 2011-04-20 2022-08-23 Amgen Inc. Autoinjector apparatus
US10092706B2 (en) 2011-04-20 2018-10-09 Amgen Inc. Autoinjector apparatus
US9533106B2 (en) 2011-12-29 2017-01-03 Novo Nordisk A/S Torsion-spring based wind-up auto injector pen with dial-up/dial-down mechanism
USD898908S1 (en) 2012-04-20 2020-10-13 Amgen Inc. Pharmaceutical product cassette for an injection device
US10786629B2 (en) 2013-03-15 2020-09-29 Amgen Inc. Drug cassette, autoinjector, and autoinjector system
US11020537B2 (en) 2013-03-15 2021-06-01 Amgen Inc. Drug cassette, autoinjector, and autoinjector system
US10092703B2 (en) 2013-03-15 2018-10-09 Amgen Inc. Drug cassette, autoinjector, and autoinjector system
US11944798B2 (en) 2013-03-15 2024-04-02 Amgen Inc. Drug cassette, autoinjector, and autoinjector system
US10492990B2 (en) 2013-03-15 2019-12-03 Amgen Inc. Drug cassette, autoinjector, and autoinjector system
US10754927B2 (en) 2013-09-26 2020-08-25 Companion Medical, Inc. System for administering a medicament
US11865306B2 (en) 2014-02-10 2024-01-09 E3D A.C.A.L Ltd Semi disposable auto injector
US9672328B2 (en) 2014-07-10 2017-06-06 Companion Medical, Inc. Medicine administering system including injection pen and companion device
US10483000B2 (en) 2014-07-10 2019-11-19 Companion Medical, Inc. Medicine administering system including injection pen and companion device
US9959391B2 (en) 2014-07-10 2018-05-01 Companion Medical, Inc. Medicine administering system including injection pen and companion device
US11563485B2 (en) 2014-07-10 2023-01-24 Medtronic Minimed, Inc. Medicine administering system including injection pen and companion device
US11786658B2 (en) 2015-08-27 2023-10-17 E3D A.C.A.L. Ltd Reusable automatic injection device
US10850036B2 (en) 2015-08-27 2020-12-01 E3D Agricultural Cooperative Association Reusable automatic injection device
WO2017066885A1 (en) * 2015-10-19 2017-04-27 Tecpharma Licensing Ag Device for administering an active substance and method for operating said device
US11826555B2 (en) 2016-01-29 2023-11-28 Medtronic Minimed, Inc. Automatic medication delivery tracking
US10864327B2 (en) 2016-01-29 2020-12-15 Companion Medical, Inc. Automatic medication delivery tracking
US11484657B2 (en) 2017-06-09 2022-11-01 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods
US11752198B2 (en) 2017-08-24 2023-09-12 Novo Nordisk A/S GLP-1 compositions and uses thereof
US11568975B2 (en) 2017-10-12 2023-01-31 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods for dose recommendation and management
US11383043B2 (en) 2017-12-12 2022-07-12 Bigfoot Biomedical, Inc. Medicine injection and disease management systems, devices, and methods
US11771835B2 (en) 2017-12-12 2023-10-03 Bigfoot Biomedical, Inc. Therapy assist information and/or tracking device and related methods and systems
US11944465B2 (en) 2017-12-12 2024-04-02 Bigfoot Biomedical, Inc. Monitor user interface for diabetes management systems including flash glucose
US11931549B2 (en) 2017-12-12 2024-03-19 Bigfoot Biomedical, Inc. User interface for diabetes management systems and devices
US11844923B2 (en) 2017-12-12 2023-12-19 Bigfoot Biomedical, Inc. Devices, systems, and methods for estimating active medication from injections
US11918789B2 (en) 2017-12-12 2024-03-05 Bigfoot Biomedical, Inc. Therapy management systems, methods, and devices
US11464459B2 (en) 2017-12-12 2022-10-11 Bigfoot Biomedical, Inc. User interface for diabetes management systems including flash glucose monitor
US11896797B2 (en) 2017-12-12 2024-02-13 Bigfoot Biomedical, Inc. Pen cap for insulin injection pens and associated methods and systems
US11547805B2 (en) 2017-12-12 2023-01-10 Bigfoot Biomedical, Inc. Therapy management systems, methods, and devices
US11904145B2 (en) 2017-12-12 2024-02-20 Bigfoot Biomedical, Inc. Diabetes therapy management systems, methods, and devices
US11369743B2 (en) 2018-05-08 2022-06-28 Companion Medical, Inc. Intelligent medication delivery systems and methods for dose setting and dispensing monitoring
US11664107B2 (en) 2018-05-08 2023-05-30 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods using a prescription-regulated software application
US10898653B2 (en) 2018-05-08 2021-01-26 Companion Medical, Inc. Intelligent medication delivery systems and methods for dose setting and dispensing monitoring
US11878151B2 (en) 2018-05-08 2024-01-23 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods for dose setting and dispensing monitoring
USD893020S1 (en) 2018-05-11 2020-08-11 Companion Medical, Inc. Injection pen
USD908210S1 (en) 2018-05-11 2021-01-19 Companion Medical, Inc. Injection pen
US11587663B2 (en) 2018-06-20 2023-02-21 Medtronic Minimed, Inc. Intelligent medication delivery systems and methods for medicine dose calculation and reporting
USD892819S1 (en) 2018-06-20 2020-08-11 Companion Medical, Inc. Display screen with graphical user interface
USD960895S1 (en) 2018-06-20 2022-08-16 Medtronic Minimed, Inc. Display screen with graphical user interface
US11948671B2 (en) 2019-04-11 2024-04-02 Medtronic Minimed, Inc. Intelligent accessories for medicine dispensing device
US11318191B2 (en) 2020-02-18 2022-05-03 Novo Nordisk A/S GLP-1 compositions and uses thereof
US11701473B2 (en) 2021-06-23 2023-07-18 Medtronic Minimed, Inc. Reusable injection pens
US11957884B2 (en) 2021-07-29 2024-04-16 Bigfoot Biomedical, Inc. Insulin injection assistance systems, methods, and devices

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JP3802064B2 (en) 2006-07-26
HUP9802676A3 (en) 1999-04-28
PT840628E (en) 2002-10-31
PL181217B1 (en) 2001-06-29
EP0840628A1 (en) 1998-05-13
DE69621133T2 (en) 2002-11-28
ATE217200T1 (en) 2002-05-15
HU219757B (en) 2001-07-30
CA2222411C (en) 2007-09-11
US6045537A (en) 2000-04-04
NO313739B1 (en) 2002-11-25
EP0840628B1 (en) 2002-05-08
CA2222411A1 (en) 1996-12-05
JPH11505755A (en) 1999-05-25
AU5893496A (en) 1996-12-18
CZ369397A3 (en) 1998-06-17
NO975525D0 (en) 1997-12-01
CN1124861C (en) 2003-10-22
BR9608634A (en) 1999-06-15
UA42066C2 (en) 2001-10-15
ES2176457T3 (en) 2002-12-01
CN1186445A (en) 1998-07-01
HUP9802676A2 (en) 1999-03-29
KR19990022231A (en) 1999-03-25
NO975525L (en) 1998-01-23
MX9709306A (en) 1998-02-28
RU2173180C2 (en) 2001-09-10
AU705105B2 (en) 1999-05-13
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DK0840628T3 (en) 2002-10-07
DE69621133D1 (en) 2002-06-13

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