US3796464A - Resilient connection for mining pick and bushing - Google Patents

Resilient connection for mining pick and bushing Download PDF

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US3796464A
US3796464A US00294032A US3796464DA US3796464A US 3796464 A US3796464 A US 3796464A US 00294032 A US00294032 A US 00294032A US 3796464D A US3796464D A US 3796464DA US 3796464 A US3796464 A US 3796464A
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Prior art keywords
protuberance
body portion
bushing
keeper
pin
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US00294032A
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L Hansen
C Davis
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ILLINOIS WATER TREATMENT COMPANY A DE CORP
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Carmet Co
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Assigned to ILLINOIS WATER TREATMENT COMPANY, A DE CORP. reassignment ILLINOIS WATER TREATMENT COMPANY, A DE CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: CARMET COMPANY
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C35/00Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18Mining picks; Holders therefor
    • E21C35/19Means for fixing picks or holders
    • E21C35/193Means for fixing picks or holders using bolts as main fixing elements
    • E21C35/1933Means for fixing picks or holders using bolts as main fixing elements the picks having a cylindrical shank
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/32Articulated members
    • Y10T403/32975Rotatable
    • Y10T403/32983Rod in socket
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/70Interfitted members
    • Y10T403/7075Interfitted members including discrete retainer
    • Y10T403/7077Interfitted members including discrete retainer for telescoping members
    • Y10T403/7079Transverse pin

Definitions

  • ABSTRACT A mining bit with a cylindrical shank has a support block with a longitudinal bore therethrough for receiving a bushing of hard material. The shank is rotatably received in the bushing. The bit is held from axial movement and the bushing from axial and rotational movement by means of a single keeper.
  • the keeper has a body portion which is received in a transverse bore in the block and a matching opening in the bushing.
  • Thekeeper also has a protuberance which extends into a circumferential groove in the bit shank.
  • the protuberance is depressible to move it out of the groove.
  • FIG. 1 is a sectional view of one embodiment of the invention
  • FIG. 2 is an end view of the tool assembly of FIG. 1;
  • FIG. 3 is a view, similar to FIG. 1, showing a second embodiment of the invention
  • FIG. 4 is an end view of the tool assembly of FIG. 3;
  • FIG. 5 is a view, partlyin' section, showing the pre ferred embodiment of the keeper of the invention.
  • FIG. 6 is a view taken on line Vl- VI of FIG. 5;
  • FIG. 7 is an end view of FIG. 5;
  • FIG, 8 is a view, similar to FIG. 5, showing another keeper of the invention.
  • FIG. 9 is a view taken on line IXIX of FIG. 8;
  • FIG. 10 is an end view of FIG. 8;
  • FIG. 11 is a view, similar to FIG. 5, showing still another keeper of the invention.
  • FIG. 12 is a top plan view of FIG. 11;
  • FIG. 13 is a view taken on line XIIIXIII of FIG 11;
  • FIG. 14 is an end view of FIG. 11.
  • FIG. 15 is an elevation of a modified tool of our invention.
  • reference numeral 2 indicates a bit block having an axial bore 4 therethrough.
  • a bushing 6 is removably received in the bore 4 and has'an outwardly extending flange 7 forming a shoulder 8 at itsforward end which bears against and protects the forward end face of block 2.
  • a cutter bit 10 is removably received .in the bushing 6.
  • the bit 10 has a circumferential groove 12 in its shank l4 and a pull out' groove 16 in that portion of the bit extending outwardly beyond the bushing 6.
  • the bushing 6 has an outwardly flaring bevelled portion 18 at the forward end of its bore for receiving a mating bevelled portion 20 on the bit 10.
  • a transverse opening 22 is provided in the block 2 and is open to the bore 4. As shown the cross-section of the opening 22 at its longitudinal center is slightly greater than a semi-circle. As clearly shown in FIGS. 1 and 2 the opening 22 is tangential to bore 4 and extends into the block 2 on two sides of bore 4.
  • the bushing 6 has a transverse opening 24 therein which mates with opening 22 when shoulder 8 abuts the end face of block 2. Opening 24 is also positioned to mate with groove 12 when bevelled portions 18 and 20 are in engagement.
  • a keeper 26 has a body portion 258 which is closely received in openings 22 and 24 and a protuberance 30 which is received in groove 12.
  • the keeper 26 is preferably made of compressible material; e.g., rubber or plastic, or otherwise constructed so that the protuberance 30 can be depressed from groove 12.
  • the bushing 6 is preferably made of an abrasion resistant material; e.g., cemented metal carbides or hardened steel.
  • the bushing 6 is inserted into the bore 4, until shoulder 8 contacts the forward end face of block 2 and the opening 24 is positioned to mate with opening 22.
  • the keeper 26 is then positioned in openings 22 and 24 and the bit 10 inserted into the bushing 6 with the protuberance 30 in groove 12.
  • a tool (not shown) is received in groove 16 and the bit 10 is pulled outwardly with the protuberance being depressed by the outer periphery of shank. 14. It will be seen that the keeper 26 prevents the bushing 6 from rotating and from moving axially. However, the'bushing6 may be easily removed and replaced.
  • the keeper 26 also holds the bit 10 in axial position while permitting it to rotate.
  • FIGS. 3 and 4 The embodiment of our invention shown in FIGS. 3 and 4 is very similar to that shown in FIGS. 1 and 2.
  • the block 2 and keeper 26 are identical.
  • bushing 6 has an eccentric opening 32 rather than a concentric opening.
  • the purpose of this construction is to permit, in the same block, the use of bits 10' having shanks 14 of various diameters.
  • the bushing 6 will have a wall thickness at one position around its periphery equal to the wall thickness of bushing 6 and the opening 24 will be located at. that position.
  • there will be provided a bit-bushing set for each size of bit shank and the selected set will be placed in position and removed as in the first embodiment.
  • FIGS. 5, 6 and 7 show the preferred embodiment of the keeper of the invention. It includes a generally cylindrical body portion 34, a protuberance 30 extending from the body portion, a metal pin 36 of less length than the protuberance having its axis parallel to the axis of the body portion and embedded in the protuberance and body portion with its ends covered with compressible material, and metal casing 38; e.g., steel, covering a major part of the periphery of the body portion.
  • the body portion and the protuberance are of a compressible material, and in this case rubber, which is firmly adhered to the casing and substantially all of the pin.
  • the pin has a main cylindrical body portion 40 with a reduced diameter portion 42 at each end. For ease of insertion the ends of the keeper are tapered at 44.
  • the embodiment of the keeper shown in FIGS. 8, 9 and 10 includes a cylindrical metal pin 46 having bevelled ends 48 embedded in a compressible body portion 50.
  • This embodiment is similar to that shown in FIGS. 5, 6 and 7, and basically differs only in the shape of the pin and in that there is no metal casing. In embodiments such as this where there is no metal casing, it is preferable to use a compressible plastic rather than rubber. Plastics are more suitable for use without metallic. casings as they can generally withstand more abuse than rubber.-
  • FIGS. 11 through 14 show the embodiment of FIGS. 8, 9 and 10 with rubber and a metal casing 56.
  • Pin 52 therein is of the same shape as is pin 46 (FIG. 9), as are plastic body portion 50 (FIG. 9) and rubber body portion 54.
  • the keepers may vary in shape from that shown.
  • the protuberance should deflect, in the area of shank groove 12, from one-eighth to three-sixteenths inch when a radial force of 30. lb. is applied to the top of the protuberance.
  • a bit 60 is mounted directly in bore 62 of a bit block 64.
  • a keeper 66 is mounted in a transverse opening 68 of block 64 with its protuberance 70 extending into a circumferential groove 72 in shank 74 of bit 60.
  • the keeperbe compressible to permit ready insertion and removal of the bit
  • certain advantages of our invention may be obtained even when the keeper is not. In such a case the bushing and bit must be inserted into the bit block before the keeper is put in place and the keeper removed before the bit and/or bushing are removed.
  • a bit block having an axial bore therethrough, a bushing mounted in said block, said bushing having a wall forming a longitudinal opening, abit having a shank received in said longitudinal opening, a circumferential groove in said shank, said bit block having a transverse opening therein open to and tangential to said bore, said transverse opening extending into said bit block on two sides of said bore, said bushing having an opening through its wall mating with said circumferential groove and said transverse opening, a keeper, said keeper having a body portion closely received in said transverse opening on both sides of said bore and in said bushing wall opening and a protuberance extending into said circumferential groove whereby said bushing is held from rotation and axial movement and whereby said bit is held from axial movement but not from rotation thereof.
  • transverse opening is cylindrical in shape with its axis parallel to a tangent of said bore, and said bushing wall opening has cylindrical surfaces having a radius equal to the radius of said transverse opening, and said body portion of said keeper has a cylindrical shape similar to said transverse opening.
  • a bit block having an axial bore therethrough, a bit having a shank received in said bore, a groove in said shank, said block having a transverse opening therein open to and tangential to said bore and extending into said bit block on two sides of said bore, said opening mating with said groove, a keeper, said keeper having a body portion closely received in said transverse opening and a protuberance extending into said groove whereby said bit is held from axial movement thereof, a substantial part of said body portion and said protuberance being of a compressible material, said protuberance having a metal pin of less length than said protuberance embedded therein in the area in which said protuberance extends into said groove, said pin having its axis parallel to the axis of said body portion, said pin being substantially completely surrounded by and firmly adhered to said compressible material, said pin being depressible from said groove.
  • a keeper comprising a generally cylindrical body portion, a substantial part of said body portion being of a compressible material, a protuberance extending from said body portion, a substantial part of said protuberance being of a compressible material, a metal pin of less length than said protuberance with compressible material bonded to each end of said pin and substantially all of its periphery embedded in said protuberance and in said body portion, said metal pin having its axis parallel to the axis of said body portion, a metal casing covering a part of the periphery of said body portion, said pin and said casing being firmly adhered to said compressible material.

Abstract

A mining bit with a cylindrical shank has a support block with a longitudinal bore therethrough for receiving a bushing of hard material. The shank is rotatably received in the bushing. The bit is held from axial movement and the bushing from axial and rotational movement by means of a single keeper. The keeper has a body portion which is received in a transverse bore in the block and a matching opening in the bushing. The keeper also has a protuberance which extends into a circumferential groove in the bit shank. The protuberance is depressible to move it out of the groove.

Description

United States Patent 1191 Hansen et a1.
1111 3,796,464 1451 Mar. 12, 1974 RESILIENT CONNECTION FOR MINING PICK AND BUSHING Lloyd B. Hansen; Charles S. Davis, both of Bridgeport, W. Va.
Carmet Company, Pittsburgh, Pa.
Sept. 27, 1972 [75] Inventors:
Assignee:
Filed:
Appl. No.:
UNITED STATES PATENTS References Cited 3,351,386 11/1967 Prox 299/92 Primary Examiner-Ernest R. Purser Attorney, Agent, or Firm-Vincent G. Gioia [5 7] ABSTRACT A mining bit with a cylindrical shank has a support block with a longitudinal bore therethrough for receiving a bushing of hard material. The shank is rotatably received in the bushing. The bit is held from axial movement and the bushing from axial and rotational movement by means of a single keeper. The keeper has a body portion which is received in a transverse bore in the block and a matching opening in the bushing. Thekeeper also has a protuberance which extends into a circumferential groove in the bit shank.
' The protuberance is depressible to move it out of the groove.
11 Claims, 15 Drawing; Figures RESILIENT CONNECTION FOR MINING PICK AND BUSHING This invention relates to mining tools and more particularly to a tool assembly including a rotatable bit mounted in a removable bushing in a bit block. These tools are subject to rough usage and the bit block, particularly its forward face, becomes worn rather quickly. Also, because of danger of fires and explosions, the tools are not welded and repaired in the mines. In some tool assemblies different size bits cannot be used with the same bit block. Mining tools for this purpose are shown in Prox U.S. Pat. Nos. 3,275,376 and 3,351,386; Kniff U.S. Pat. Nos. 3,499,685 and 3,512,838; and Krekeler U.S. Pat. Nos. 2,965,365, 3,088,721, 3,342,531 and 3,397,012. However, all of these tool assemblieshave one or more drawbacks.
It is accordingly an object of this invention to provide a mine tool and mine tool keeper means.
The foregoing and other objects of the invention will be best understood from the following description, reference being had to the accompanying drawings wherein:
FIG. 1 is a sectional view of one embodiment of the invention;
FIG. 2 is an end view of the tool assembly of FIG. 1;
FIG. 3 is a view, similar to FIG. 1, showing a second embodiment of the invention;
FIG. 4 is an end view of the tool assembly of FIG. 3;
FIG. 5 is a view, partlyin' section, showing the pre ferred embodiment of the keeper of the invention;
FIG. 6 is a view taken on line Vl- VI of FIG. 5;
FIG. 7 is an end view of FIG. 5;
FIG, 8 is a view, similar to FIG. 5, showing another keeper of the invention;
FIG. 9 is a view taken on line IXIX of FIG. 8;
FIG. 10 is an end view of FIG. 8;
FIG. 11 is a view, similar to FIG. 5, showing still another keeper of the invention;
FIG. 12 is a top plan view of FIG. 11;
FIG. 13 is a view taken on line XIIIXIII of FIG 11;
FIG. 14 is an end view of FIG. 11; and
FIG. 15 is an elevation of a modified tool of our invention. I
Referring more particularly to FIGS. 1 and 2 of the drawings, reference numeral 2 indicates a bit block having an axial bore 4 therethrough. A bushing 6 is removably received in the bore 4 and has'an outwardly extending flange 7 forming a shoulder 8 at itsforward end which bears against and protects the forward end face of block 2. A cutter bit 10 is removably received .in the bushing 6. The bit 10 has a circumferential groove 12 in its shank l4 and a pull out' groove 16 in that portion of the bit extending outwardly beyond the bushing 6. The bushing 6 has an outwardly flaring bevelled portion 18 at the forward end of its bore for receiving a mating bevelled portion 20 on the bit 10.
A transverse opening 22 is provided in the block 2 and is open to the bore 4. As shown the cross-section of the opening 22 at its longitudinal center is slightly greater than a semi-circle. As clearly shown in FIGS. 1 and 2 the opening 22 is tangential to bore 4 and extends into the block 2 on two sides of bore 4. The bushing 6 has a transverse opening 24 therein which mates with opening 22 when shoulder 8 abuts the end face of block 2. Opening 24 is also positioned to mate with groove 12 when bevelled portions 18 and 20 are in engagement. A keeper 26 has a body portion 258 which is closely received in openings 22 and 24 and a protuberance 30 which is received in groove 12. The keeper 26 is preferably made of compressible material; e.g., rubber or plastic, or otherwise constructed so that the protuberance 30 can be depressed from groove 12. The bushing 6 is preferably made of an abrasion resistant material; e.g., cemented metal carbides or hardened steel.
In operation, the bushing 6 is inserted into the bore 4, until shoulder 8 contacts the forward end face of block 2 and the opening 24 is positioned to mate with opening 22. The keeper 26 is then positioned in openings 22 and 24 and the bit 10 inserted into the bushing 6 with the protuberance 30 in groove 12. To remove the bit 10 a tool (not shown) is received in groove 16 and the bit 10 is pulled outwardly with the protuberance being depressed by the outer periphery of shank. 14. It will be seen that the keeper 26 prevents the bushing 6 from rotating and from moving axially. However, the'bushing6 may be easily removed and replaced. The keeper 26 also holds the bit 10 in axial position while permitting it to rotate.
The embodiment of our invention shown in FIGS. 3 and 4 is very similar to that shown in FIGS. 1 and 2. The block 2 and keeper 26 are identical. However, bushing 6 has an eccentric opening 32 rather than a concentric opening. The purpose of this construction is to permit, in the same block, the use of bits 10' having shanks 14 of various diameters. In all cases the bushing 6 will have a wall thickness at one position around its periphery equal to the wall thickness of bushing 6 and the opening 24 will be located at. that position. Thus, there will be provided a bit-bushing set for each size of bit shank and the selected set will be placed in position and removed as in the first embodiment.
FIGS. 5, 6 and 7 show the preferred embodiment of the keeper of the invention. It includes a generally cylindrical body portion 34, a protuberance 30 extending from the body portion, a metal pin 36 of less length than the protuberance having its axis parallel to the axis of the body portion and embedded in the protuberance and body portion with its ends covered with compressible material, and metal casing 38; e.g., steel, covering a major part of the periphery of the body portion. The body portion and the protuberance are of a compressible material, and in this case rubber, which is firmly adhered to the casing and substantially all of the pin. The pin has a main cylindrical body portion 40 with a reduced diameter portion 42 at each end. For ease of insertion the ends of the keeper are tapered at 44.
The embodiment of the keeper shown in FIGS. 8, 9 and 10 includes a cylindrical metal pin 46 having bevelled ends 48 embedded in a compressible body portion 50. This embodiment is similar to that shown in FIGS. 5, 6 and 7, and basically differs only in the shape of the pin and in that there is no metal casing. In embodiments such as this where there is no metal casing, it is preferable to use a compressible plastic rather than rubber. Plastics are more suitable for use without metallic. casings as they can generally withstand more abuse than rubber.-
FIGS. 11 through 14 show the embodiment of FIGS. 8, 9 and 10 with rubber and a metal casing 56. Pin 52 therein is of the same shape as is pin 46 (FIG. 9), as are plastic body portion 50 (FIG. 9) and rubber body portion 54.
It should be noted that the keepers may vary in shape from that shown. For best operation the protuberance should deflect, in the area of shank groove 12, from one-eighth to three-sixteenths inch when a radial force of 30. lb. is applied to the top of the protuberance.
While the keeper is of greatest benefit in the combinations of FIGS. 1 to 4 it may also be used without a bushing as shown in FIG. l5. ln this embodiment a bit 60 is mounted directly in bore 62 of a bit block 64. A keeper 66 is mounted in a transverse opening 68 of block 64 with its protuberance 70 extending into a circumferential groove 72 in shank 74 of bit 60.
While it is preferred that the keeperbe compressible to permit ready insertion and removal of the bit, certain advantages of our invention may be obtained even when the keeper is not. In such a case the bushing and bit must be inserted into the bit block before the keeper is put in place and the keeper removed before the bit and/or bushing are removed.
It will be apparent to those skilled in the art that the novel principles of the invention disclosed herein in connection with specific examples thereof will suggest various other modifications and applications of the same. It is accordingly desired that in construing the breadth of the appended claims they shall not be limited to the specific examples of the invention described herein.
We claim:
1. In combination, a bit block having an axial bore therethrough, a bushing mounted in said block, said bushing having a wall forming a longitudinal opening, abit having a shank received in said longitudinal opening, a circumferential groove in said shank, said bit block having a transverse opening therein open to and tangential to said bore, said transverse opening extending into said bit block on two sides of said bore, said bushing having an opening through its wall mating with said circumferential groove and said transverse opening, a keeper, said keeper having a body portion closely received in said transverse opening on both sides of said bore and in said bushing wall opening and a protuberance extending into said circumferential groove whereby said bushing is held from rotation and axial movement and whereby said bit is held from axial movement but not from rotation thereof.
2. The combination of claim 1 in which said bushing has an outwardly extending flange at its forward end forming a shoulder bearing against the forward end face of said block.
3. The combination of claim 1 in which the axis of said longitudinal opening is offset with respect to the outside diameter of said bushing so that the wall thickness varies around the periphery of said bushing, said bushing wall opening being in the wall portion having the minimum thickness.
4. The combination of claim 3 in which said bushing has an outwardly extending flange at its forward end forming a shoulder bearing against the forward end face of said block.
5. The combination of claim 1 in which said keeper is depressible an amount sufficient to permit said protuberance to be displaced from said groove.
6. The combination of claim 5 in which said keeper has a metal pin embedded in said protuberance and in which a substantial part of said protuberance and said body portion is of a compressible material, said pin extending only a portion of the length of said protuberance and having compressible material surrounding substantially all of its peripheral surface and ends.
7. The combination of claim 6 in which a substantial part of said protuberance and body portion is rubber, and said keeper includes a metal casing covering a part of the periphery of said body portion, and in which said pin and said casing are firmly adhered to said rubber.
8. The combination of claim 5 in which said transverse opening is cylindrical in shape with its axis parallel to a tangent of said bore, and said bushing wall opening has cylindrical surfaces having a radius equal to the radius of said transverse opening, and said body portion of said keeper has a cylindrical shape similar to said transverse opening.
9. In combination, a bit block having an axial bore therethrough, a bit having a shank received in said bore, a groove in said shank, said block having a transverse opening therein open to and tangential to said bore and extending into said bit block on two sides of said bore, said opening mating with said groove, a keeper, said keeper having a body portion closely received in said transverse opening and a protuberance extending into said groove whereby said bit is held from axial movement thereof, a substantial part of said body portion and said protuberance being of a compressible material, said protuberance having a metal pin of less length than said protuberance embedded therein in the area in which said protuberance extends into said groove, said pin having its axis parallel to the axis of said body portion, said pin being substantially completely surrounded by and firmly adhered to said compressible material, said pin being depressible from said groove.
10. The combination of claim 9 in which a substantial part of said protuberance and body portion is rubber, and said keeper includes a metal casing covering a part of the periphery of said body portion, and in which said pin and said casing are firmly adhered to said rubber.
1 l. A keeper comprising a generally cylindrical body portion, a substantial part of said body portion being of a compressible material, a protuberance extending from said body portion, a substantial part of said protuberance being of a compressible material, a metal pin of less length than said protuberance with compressible material bonded to each end of said pin and substantially all of its periphery embedded in said protuberance and in said body portion, said metal pin having its axis parallel to the axis of said body portion, a metal casing covering a part of the periphery of said body portion, said pin and said casing being firmly adhered to said compressible material.

Claims (11)

1. In combination, a bit block having an axial bore therethrough, a bushing mounted in said block, said bushing having a wall forming a longitudinal opening, a bit having a shank received in said longitudinal opening, a circumferential groove in said shank, said bit block having a transverse opening therein open to and tangential to said bore, said transverse opening extending into said bit block on two sides of said bore, said bushing having an opening through its wall mating with said circumferential groove and said transverse opening, a keeper, said keeper having a body portion closely received in said transverse opening on both sides of said bore and in said bushing wall opening and a protuberance extending into said circumferential groove whereby said bushing is held from rotation and axial movement and whereby said bit is held from axial movement but not from rotation thereof.
2. The combination of claim 1 in which said bushing has an outwardly extending flange at its forward end forming a shoulder bearing against the forward end face of said block.
3. The combination of claim 1 in which the axis of said longitudinal opening is offset with respect to the outside diameter of said bushing so that the wall thickness varies around the periphery of said bushing, said bushing wall opening being in the wall portion having the minimum thickness.
4. The combination of claim 3 in which said bushing has an outwardly extending flange at its forward end forming a shoulder bearing against the forward end face of said block.
5. The combination of claim 1 in which said keeper is depressible an amount sufficient to permit said protuberance to be displaced from said groove.
6. The combination of claim 5 in which said keeper has a metal pin embedded in said protuberance and in which a substantial part of said protuberance and said body portion is of a compressible material, said pin extending only a portion of the length of said protuberance and having compressible material surrounding substantially all of its peripheral surface and ends.
7. The combination of claim 6 in which a substantial part of said protuberance and body portion is rubber, and said keeper includes a metal casing covering a part of the periphery of said body portion, and in which said pin and said casing are firmly adhered to said rubber.
8. The combination of claim 5 in which said transverse opening is cylindrical in shape with its axis parallel to a tangent of said bore, and said bushing wall opening has cylindrical surfaces having a radius equal to the radius of said transverse opening, and said body portion of said keeper has a cylindrical shape simiLar to said transverse opening.
9. In combination, a bit block having an axial bore therethrough, a bit having a shank received in said bore, a groove in said shank, said block having a transverse opening therein open to and tangential to said bore and extending into said bit block on two sides of said bore, said opening mating with said groove, a keeper, said keeper having a body portion closely received in said transverse opening and a protuberance extending into said groove whereby said bit is held from axial movement thereof, a substantial part of said body portion and said protuberance being of a compressible material, said protuberance having a metal pin of less length than said protuberance embedded therein in the area in which said protuberance extends into said groove, said pin having its axis parallel to the axis of said body portion, said pin being substantially completely surrounded by and firmly adhered to said compressible material, said pin being depressible from said groove.
10. The combination of claim 9 in which a substantial part of said protuberance and body portion is rubber, and said keeper includes a metal casing covering a part of the periphery of said body portion, and in which said pin and said casing are firmly adhered to said rubber.
11. A keeper comprising a generally cylindrical body portion, a substantial part of said body portion being of a compressible material, a protuberance extending from said body portion, a substantial part of said protuberance being of a compressible material, a metal pin of less length than said protuberance with compressible material bonded to each end of said pin and substantially all of its periphery embedded in said protuberance and in said body portion, said metal pin having its axis parallel to the axis of said body portion, a metal casing covering a part of the periphery of said body portion, said pin and said casing being firmly adhered to said compressible material.
US00294032A 1972-09-27 1972-09-27 Resilient connection for mining pick and bushing Expired - Lifetime US3796464A (en)

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DE2822548A1 (en) * 1978-05-23 1979-11-29 Sandvik Ab DEVICE FOR CONNECTING A PROJECTING PART TO A RECEIVING PART
US4274678A (en) * 1979-07-11 1981-06-23 Austin Hoy And Company Limited Socketed boss having means for retaining a tool shank
WO1982003235A1 (en) * 1981-03-16 1982-09-30 Radigan Michael T Retaining pin assembly for earthworking tool
US4372703A (en) * 1981-01-12 1983-02-08 The Singer Company Tapered screw fastening means for bushings, sleeves and bearings
US4462638A (en) * 1981-12-30 1984-07-31 Denbesten Leroy E Mining bit with improved split ring retainer
US4515497A (en) * 1981-10-26 1985-05-07 Magyar Aluminiumipari Troszt Clamping element for the releasable fastening of spatially arranged, or parallel bars, tubes and similar objects
US4559842A (en) * 1983-10-21 1985-12-24 Nissan Motor Co., Ltd. Mounting setup of governor shaft
US4561698A (en) * 1984-06-21 1985-12-31 Beebe Donald E Wear protector for tooth brackets on roadway surface cutting machines
US4627665A (en) * 1985-04-04 1986-12-09 Ss Indus. Cold-headed and roll-formed pick type cutter body with carbide insert
US4747278A (en) * 1985-06-06 1988-05-31 Bernedette M. Roncelli Shift lock
EP0286555A1 (en) * 1987-04-07 1988-10-12 Morgon S.A. Device for securely, rapidly and removably attaching a tool to a tool holder
FR2615562A1 (en) * 1987-05-20 1988-11-25 Seraphin Leon Device for rapidly and securely fixing a tool on a tool-holder and corresponding fixing method
US4823720A (en) * 1987-07-24 1989-04-25 Foster Lewis R Batten attachment
US4844550A (en) * 1987-07-21 1989-07-04 Beebe Donald E Wear protector for tooth brackets on roadway surface cutting machines
US4865392A (en) * 1985-07-18 1989-09-12 Gte Products Corporation Rotatable cutting bit
US5116072A (en) * 1990-08-20 1992-05-26 Swenson John C Ball hitch with rotatable ball
US5174694A (en) * 1991-09-24 1992-12-29 The United States Of America As Represented By The Administrator Of The National Aeronautics & Space Administration Retractable tool bit having slider type catch mechanism
WO1993005245A1 (en) * 1991-09-10 1993-03-18 Caterpillar Inc. Retaining mechanism for a tooth assembly
US5205057A (en) * 1991-09-10 1993-04-27 Caterpillar Inc. Retaining mechanism for a tooth assembly
US5746381A (en) * 1995-06-07 1998-05-05 Daiwa Seiko, Inc. Fishing reel with clutch mechanism utilizing an engaging protrusion and engaging recesses
US5810102A (en) * 1996-08-23 1998-09-22 Stewart; Gary L. Reversible bit assembly
US5913634A (en) * 1995-10-20 1999-06-22 Trw Occupant Restraint Systems Gmbh Attachment device for connecting a vehicle steering wheel to a steering shaft
US5973242A (en) * 1997-10-31 1999-10-26 Spezia; Raffaele System for fixing the neck onto the body of stringed instruments
US6354771B1 (en) 1998-12-12 2002-03-12 Boart Longyear Gmbh & Co. Kg Cutting or breaking tool as well as cutting insert for the latter
US20020121003A1 (en) * 2001-02-06 2002-09-05 Shuker John Douglas Vehicle door hinge
US6478383B1 (en) 1999-10-18 2002-11-12 Kennametal Pc Inc. Rotatable cutting tool-tool holder assembly
USRE38151E1 (en) 1985-07-18 2003-06-24 Kennametal Inc. Rotatable cutting bit
US6749237B1 (en) * 2001-06-08 2004-06-15 Shu Lan Ma Unitary body swiveling hoist ring and method of manufacture
US20050127742A1 (en) * 2003-12-11 2005-06-16 River City Manufacturing Inc. Retaining system for securing a cutting tool to a support block
WO2005084893A1 (en) * 2004-03-08 2005-09-15 Jakob Werner J Handle for tools
US20080236900A1 (en) * 2005-06-09 2008-10-02 Us Synthetic Corporation Cutting element apparatuses and drill bits so equipped
US20090208307A1 (en) * 2008-02-18 2009-08-20 Guyton Jason D Releasable Fastener Systems and Methods
US20100236831A1 (en) * 2007-08-06 2010-09-23 Mitsubishi Materials Corporation Excavation Tool
US20110129294A1 (en) * 2009-04-07 2011-06-02 Toyota Jidosha Kabushiki Kaisha Shaft connection structure
US20130008992A1 (en) * 2011-07-06 2013-01-10 Harney William L Pick retainer
US20140234039A1 (en) * 2011-11-09 2014-08-21 Vijay Kumar Mada Novel rigid universal cartridge for holding system
US20150137052A1 (en) * 2013-11-15 2015-05-21 Michael T. DeKeuster Removable floor jack saddle
US20160124163A1 (en) * 2014-10-29 2016-05-05 Compass Electro Optical Systems Ltd. Vacuum gripper
US20160271778A1 (en) * 2015-03-21 2016-09-22 Chih Kuan Hsieh Fixing Structure for Cylinder
US9724701B2 (en) 2013-03-12 2017-08-08 Joy Mm Delaware, Inc. Tapered pick holder
US20170266669A1 (en) * 2013-03-12 2017-09-21 Joy Mm Delaware, Inc. Pick with limited tapered engagement
US9828742B2 (en) 2014-01-31 2017-11-28 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements
US10086666B2 (en) * 2014-09-26 2018-10-02 Subaru Corporation Coupling structure for vehicle chassis members
US20190030755A1 (en) * 2017-07-27 2019-01-31 Everpads Co., Ltd. Cutting tool holding device
US10352163B2 (en) 2014-01-31 2019-07-16 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements

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US5931542A (en) * 1997-03-18 1999-08-03 Rogers Tool Works, Inc. Device and method for preventing wear on road milling and trenching equipment

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US3351386A (en) * 1965-11-10 1967-11-07 Frank Prox Company Inc Retainer for coal cutter bits

Cited By (61)

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Publication number Priority date Publication date Assignee Title
DE2822548A1 (en) * 1978-05-23 1979-11-29 Sandvik Ab DEVICE FOR CONNECTING A PROJECTING PART TO A RECEIVING PART
US4212559A (en) * 1978-05-23 1980-07-15 Sandvik Aktiebolag Means for connecting a male part with a female part
US4274678A (en) * 1979-07-11 1981-06-23 Austin Hoy And Company Limited Socketed boss having means for retaining a tool shank
US4372703A (en) * 1981-01-12 1983-02-08 The Singer Company Tapered screw fastening means for bushings, sleeves and bearings
WO1982003235A1 (en) * 1981-03-16 1982-09-30 Radigan Michael T Retaining pin assembly for earthworking tool
US4515497A (en) * 1981-10-26 1985-05-07 Magyar Aluminiumipari Troszt Clamping element for the releasable fastening of spatially arranged, or parallel bars, tubes and similar objects
US4462638A (en) * 1981-12-30 1984-07-31 Denbesten Leroy E Mining bit with improved split ring retainer
US4559842A (en) * 1983-10-21 1985-12-24 Nissan Motor Co., Ltd. Mounting setup of governor shaft
US4561698A (en) * 1984-06-21 1985-12-31 Beebe Donald E Wear protector for tooth brackets on roadway surface cutting machines
US4627665A (en) * 1985-04-04 1986-12-09 Ss Indus. Cold-headed and roll-formed pick type cutter body with carbide insert
US4747278A (en) * 1985-06-06 1988-05-31 Bernedette M. Roncelli Shift lock
USRE38151E1 (en) 1985-07-18 2003-06-24 Kennametal Inc. Rotatable cutting bit
US4865392A (en) * 1985-07-18 1989-09-12 Gte Products Corporation Rotatable cutting bit
EP0286555A1 (en) * 1987-04-07 1988-10-12 Morgon S.A. Device for securely, rapidly and removably attaching a tool to a tool holder
FR2613768A1 (en) * 1987-04-07 1988-10-14 Ugicarb Morgon DEVICE FOR FAST, FAST AND REMOVABLE FASTENING OF A TOOL TO A TOOL HOLDER
FR2615562A1 (en) * 1987-05-20 1988-11-25 Seraphin Leon Device for rapidly and securely fixing a tool on a tool-holder and corresponding fixing method
US4844550A (en) * 1987-07-21 1989-07-04 Beebe Donald E Wear protector for tooth brackets on roadway surface cutting machines
US4823720A (en) * 1987-07-24 1989-04-25 Foster Lewis R Batten attachment
US5116072A (en) * 1990-08-20 1992-05-26 Swenson John C Ball hitch with rotatable ball
WO1993005245A1 (en) * 1991-09-10 1993-03-18 Caterpillar Inc. Retaining mechanism for a tooth assembly
US5205057A (en) * 1991-09-10 1993-04-27 Caterpillar Inc. Retaining mechanism for a tooth assembly
GB2264133A (en) * 1991-09-10 1993-08-18 Caterpillar Inc Retaining mechanism for a tooth assembly
GB2264133B (en) * 1991-09-10 1995-03-29 Caterpillar Inc Retaining mechanism
US5174694A (en) * 1991-09-24 1992-12-29 The United States Of America As Represented By The Administrator Of The National Aeronautics & Space Administration Retractable tool bit having slider type catch mechanism
US5746381A (en) * 1995-06-07 1998-05-05 Daiwa Seiko, Inc. Fishing reel with clutch mechanism utilizing an engaging protrusion and engaging recesses
US5913634A (en) * 1995-10-20 1999-06-22 Trw Occupant Restraint Systems Gmbh Attachment device for connecting a vehicle steering wheel to a steering shaft
US5810102A (en) * 1996-08-23 1998-09-22 Stewart; Gary L. Reversible bit assembly
US5973242A (en) * 1997-10-31 1999-10-26 Spezia; Raffaele System for fixing the neck onto the body of stringed instruments
US6354771B1 (en) 1998-12-12 2002-03-12 Boart Longyear Gmbh & Co. Kg Cutting or breaking tool as well as cutting insert for the latter
US6478383B1 (en) 1999-10-18 2002-11-12 Kennametal Pc Inc. Rotatable cutting tool-tool holder assembly
US7805811B2 (en) * 2001-02-06 2010-10-05 Multimatic Advanced Technologies, Inc. Vehicle door hinge
US20020121003A1 (en) * 2001-02-06 2002-09-05 Shuker John Douglas Vehicle door hinge
US6749237B1 (en) * 2001-06-08 2004-06-15 Shu Lan Ma Unitary body swiveling hoist ring and method of manufacture
US20050127742A1 (en) * 2003-12-11 2005-06-16 River City Manufacturing Inc. Retaining system for securing a cutting tool to a support block
WO2005084893A1 (en) * 2004-03-08 2005-09-15 Jakob Werner J Handle for tools
US8528670B1 (en) 2005-06-09 2013-09-10 Us Synthetic Corporation Cutting element apparatuses and drill bits so equipped
US20080236900A1 (en) * 2005-06-09 2008-10-02 Us Synthetic Corporation Cutting element apparatuses and drill bits so equipped
US7942218B2 (en) * 2005-06-09 2011-05-17 Us Synthetic Corporation Cutting element apparatuses and drill bits so equipped
US9091132B1 (en) 2005-06-09 2015-07-28 Us Synthetic Corporation Cutting element apparatuses and drill bits so equipped
US9909366B1 (en) 2005-06-09 2018-03-06 Us Synthetic Corporation Cutting element apparatuses and drill bits so equipped
US20100236831A1 (en) * 2007-08-06 2010-09-23 Mitsubishi Materials Corporation Excavation Tool
US8104551B2 (en) * 2007-08-06 2012-01-31 Mitsubishi Materials Corporation Excavation tool
US20090208307A1 (en) * 2008-02-18 2009-08-20 Guyton Jason D Releasable Fastener Systems and Methods
US8221043B2 (en) * 2008-02-18 2012-07-17 Lockheed Martin Corporation Releasable fastener systems and methods
US8277142B2 (en) * 2009-04-07 2012-10-02 Toyota Jidosha Kabushiki Kaisha Shaft connection structure
US20110129294A1 (en) * 2009-04-07 2011-06-02 Toyota Jidosha Kabushiki Kaisha Shaft connection structure
US20130008992A1 (en) * 2011-07-06 2013-01-10 Harney William L Pick retainer
US9757730B2 (en) * 2011-07-06 2017-09-12 Joy Mm Delaware, Inc. Pick retainer
US20140234039A1 (en) * 2011-11-09 2014-08-21 Vijay Kumar Mada Novel rigid universal cartridge for holding system
US9770770B2 (en) * 2012-11-09 2017-09-26 Vijay Kumar Mada Rigid universal cartridge for holding system
US20160136740A1 (en) * 2012-11-09 2016-05-19 Vijay Kumar Mada Novel rigid universal cartridge for holding system
US9724701B2 (en) 2013-03-12 2017-08-08 Joy Mm Delaware, Inc. Tapered pick holder
US20170266669A1 (en) * 2013-03-12 2017-09-21 Joy Mm Delaware, Inc. Pick with limited tapered engagement
US20150137052A1 (en) * 2013-11-15 2015-05-21 Michael T. DeKeuster Removable floor jack saddle
US9828742B2 (en) 2014-01-31 2017-11-28 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements
US10352163B2 (en) 2014-01-31 2019-07-16 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements
US10086666B2 (en) * 2014-09-26 2018-10-02 Subaru Corporation Coupling structure for vehicle chassis members
US20160124163A1 (en) * 2014-10-29 2016-05-05 Compass Electro Optical Systems Ltd. Vacuum gripper
US20160271778A1 (en) * 2015-03-21 2016-09-22 Chih Kuan Hsieh Fixing Structure for Cylinder
US20190030755A1 (en) * 2017-07-27 2019-01-31 Everpads Co., Ltd. Cutting tool holding device
US10596723B2 (en) * 2017-07-27 2020-03-24 Everpads Co., Ltd. Cutting tool holding device

Also Published As

Publication number Publication date
FR2200435B1 (en) 1982-08-27
FR2200435A1 (en) 1974-04-19
DE2348446C2 (en) 1981-10-01
AU476593B2 (en) 1976-09-30
AU6007573A (en) 1975-03-06
DE2348446A1 (en) 1974-04-04
CA987353A (en) 1976-04-13

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Owner name: ILLINOIS WATER TREATMENT COMPANY, 4669 SHEPHERD TR

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CARMET COMPANY;REEL/FRAME:004182/0225

Effective date: 19830929