US3830546A - Mining tool and support block therefor - Google Patents

Mining tool and support block therefor Download PDF

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Publication number
US3830546A
US3830546A US00336935A US33693573A US3830546A US 3830546 A US3830546 A US 3830546A US 00336935 A US00336935 A US 00336935A US 33693573 A US33693573 A US 33693573A US 3830546 A US3830546 A US 3830546A
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bit
block
bore
shank
shoulder
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US00336935A
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T Kniff
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Kennametal Inc
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Kennametal Inc
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Priority to US00336935A priority Critical patent/US3830546A/en
Priority to ZA00740921A priority patent/ZA74921B/en
Priority to GB643574A priority patent/GB1453374A/en
Priority to AU65579/74A priority patent/AU481678B2/en
Priority to CA192,543A priority patent/CA994373A/en
Priority to DE2409629A priority patent/DE2409629B2/en
Priority to FR7407156A priority patent/FR2219996B1/fr
Application granted granted Critical
Publication of US3830546A publication Critical patent/US3830546A/en
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details 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
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/19—Means for fixing picks or holders
    • E21C35/197—Means for fixing picks or holders using sleeves, rings or the like, as main fixing elements

Definitions

  • ABSTRACT A mining tool of the pick type which is symmetrical about a longitudinal axis and which has a shank which is circular in cross section that is rotatably received in a correspondingly shaped bore in a support block.
  • the bore in the support block has a forwardly facing shoulder intermediate the ends and the shank of the bit has a rearwardly facing shoulder engaging the forwardly facing shoulder in the bore.
  • the forward face of the support block is flat and perpendicular to the axis of the bore therein and the bit comprises a radial flange which is spaced from the forward end of the block when the bit and block are new but which, upon one or the other of the shoulders on the bit shank and block becoming worn, will engage the front of the block and take at least part of the axial load imposed on the bit.
  • the present invention relates to mining tools and is particularly concerned with pick type bits and support blocks in which the pick type bits are rotatably supported.
  • Bits and support blocks of the general nature referred to are known and are illustrated, for example, in US. Pat. Nos. 3,499,685, 3,519,309 and 3,650,565.
  • the bits and support blocks have interengaging tapered shoulders thereon for absorbing thrusts imposed on the bit during working operations.
  • the provision of the tapered shoulders are adequate for supporting the bit throughout its working life and wear on the shoulders is not particularly pronounced.
  • the pick and block combination has the tapered load bearing shoulder disposed at the mouth of the bore extending into the block and this has proved to be quite satisfactory for supporting the smaller sized bits.
  • the tapered shoulder is disposed about midway in the length of the bore in the block and the shank on the tool is formed to two diameters with a rearwardly facing shoulder at the juncture thereof which engages the shoulder in the block.
  • This arrangement has been provided for the purpose of permitting a sleeve to be interposed between a small type pick and the block to distribute wear between the pick and sleeve and block while at the same time permitting the sleeve to be withdrawn from the block and replaced by a heavy duty bit having a substantially larger shank than a bit that is receivable in the sleeve.
  • Such heavy duty picks can operate under loads that would break or bend the small bits and are, thus, employed when hard formations are to be reduced by the mining tool.
  • the present invention has as a primary objective the provision of a bit and block combination in which the bit and block are provided with additional opposed interengageable areas which will come into engagement upon any appreciable wear taking place on the conventional tapered shoulders provided on the bit and block.
  • a further object is the provision of a bit construction in which access of fine abrasive material into the bore in the block is inhibitedand wherein the operation of the bit is stabilized and made more secure.
  • FIG. 1 is a side view showing a bit according to the present invention mounted in a support block with the bit partially in cross section and the block in full cross section;
  • FIG. 2 is a fragmentary view similar to FIG. 1 but showing a different arrangement for holding the bit in the bore in the block.
  • a mining tool support block having a bore extending therethrough from the front end on an axis perpendicular to the front end and with a larger forward part and a smaller rearward part with a forwardly facing tapered shoulder at the juncture of the parts of the bore.
  • a mining bit having a shank which is circular in cross section iw provided with a shank which is circular in cross section and receivable in the bore in the block with the shank having a rearwardly portion of smaller diameter and a forward portion and a rearwardly facing shoulder at the juncture of said portions; the shoulder on the bit shank engaging the shoulder in the bore.
  • the bit projects forwardly from the front end of the block and has a circular forward portion which tapers inwardly to a point disposed on the longitudinal axis of the bit and which point is advantageously provided by an element of hard wear resistant material such as a cemented hard metallic carbide which is mounted in the forward portion of the bit.
  • the bit Immediately forwardly of the front face of the block the bit is provided with a rearwardly facing radial shoulder, formed by an annular flange on the bit.
  • the rearwardly facing shoulder is normally spaced at least a slight distance forwardly from the front end of the block but will engage the block when any sensible amount of wear occurs on one or both of the shoulders in the bore of the block and on the shank of the bit.
  • the radial shoulder at the front end of the block inhibits the entrance of grit into the bore of the block and, furthermore, once it engages or comes quite close to the front end of the block, stabilizes the bit in the block by inhibiting tilting of the bit in the block. Once the radial shoulder on the bit engages the front end of the block, it stabilizes the bit to the fullest extent possible while also sharing in the axial load imposed on the bit during working operations and even more completely sealing the bore in the block against the ingress of fine abrasive material.
  • the support block indicated at 10
  • the bore has a smaller rear part 18 and a larger front part 20 and an inclined shoulder 22 at the juncture of said parts and disposed about midway along the length of bore 12.
  • a pick type bit is adapted for being rotatably mounted in support block 10 and includes a shank generally indicated at 30 having a smaller rearward portion 32 and a larger forward portion 34 and a shoulder 36 connecting portions 32 and 34 and inclined so as to be complementary to shoulder 22 in the bore.
  • Smaller diameter portion 32 of the shank may extend out of the bore beyond the rear face 16 of the block and having snap ring 38 mounted in a groove 40 provided in the shank so as to retain the shank in the block while permitting free rotation of the shank in the block.
  • the bit Outwardly from forward face 14 of the block the bit has a forward working portion 42 tapering inwardly to a pointed end 44 and which pointed end is advantageously provided by an insert 46 formed of cemented hard metal carbide, tungsten carbide, for example.
  • Point 44 it will be noted, is on the axis of the bit and the bit is circular at each point therealong and symmetrical about the aforementioned axis.
  • the bit Immediately forwardly of front face 14 of block the bit has a flange or larger diameter portion 48 which provides a rearwardly facing shoulder radial 50 which is parallel to the plane of front face 14 of the block.
  • radial shoulder 50 is spaced at least a slight distance forwardly from the front face 14 of block 10 but will engage face 14 when one or the other, or both of the shoulders on the bit shank and in the bore in the block wear down.
  • flange 48 tends to inhibit the entrance of abrasive grit into the bore in block 10 and, when shoulder 50 engages front end face 14 of the block, shoulder 50 shares the axial load on the bit and inhibits tilting of the bit in the block, thus, reducing wear on the periphery of the bit shank and on the axial portions of the bore in the block. Further, when shoulder 50 engages face 14, the bore in the block is substantially sealed against the ingress of abrasive grit.
  • FIG. 2 shows a modification in which the bit, generally designated at 60, is held in the block, designated generally at 62, by a resilient annular spring clip 64 mounted in a groove 66 formed in the shank of the bit and resiliently contractable in the groove to permit the bit to be inserted in the bore in the block and then radially expansible when the bit is positioned in the block so as to engage the annular undercut 68 formed in the bore in the block.
  • the resilient clip 62 forms a connecting arrangement which will hold the bit in the block while permitting free rotation thereof and, furthermore, permits the bit to be pressed into the block and either pried or driven therefrom quite readily.
  • a bit symmetrical about a longitudinal axis and having a cylindrical shank portion at the rear end with the rearward part of the shank portion substantially smaller in diameter than the forward part thereof and with an inclined rearwardly facing annular shoulder at the juncture of said parts, said bit having a cylindrical working portion at the front end of about the same diameter as the forward part of said shank and terminating in a point at the forward end with the point on said longitudinal axis of the tool, the rear end of said working portion being integrally joined to the forward end of said forward part of said shank portion, and a radially outwardly projecting annular flange at the juncture of said working portion with said shank portion forming a rearwardly facing radial shoulder in a plane substantially perpendicular to the longitudinal axis of the tool.
  • a mining tool according to claim 1 in which the said rearward part of said shank portion includes means for detachably and rotatably retaining said bit in a support block.
  • a mining tool according to claim 1 in which the said rearward and forward parts of said shank portion are about equal in length.
  • a mining tool according to claim 1 in which the length of said forward working portion is about equal to the length of said shank portion.
  • a mining tool including in combination therewith a support block having a shouldered bore adapted rotatably to receive said shank portion of said bit, the shoulder in said bore facing forwardly and being inclined at the same angle as the inclined shoulder on said shank portion and engaging the inclined shoulder on said shank portion, said block having a forward face with at least the portion surrounding said bore disposed in a plane perpendicular to the axis of said bore, said portion of said forward face of said block being positioned immediately rearwardly of said radial shoulder on said bit so as to be engageable with said radial shoulder in the event of wear of said inclined shoulders.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Earth Drilling (AREA)

Abstract

A mining tool of the pick type which is symmetrical about a longitudinal axis and which has a shank which is circular in cross section that is rotatably received in a correspondingly shaped bore in a support block. The bore in the support block has a forwardly facing shoulder intermediate the ends and the shank of the bit has a rearwardly facing shoulder engaging the forwardly facing shoulder in the bore. The forward face of the support block is flat and perpendicular to the axis of the bore therein and the bit comprises a radial flange which is spaced from the forward end of the block when the bit and block are new but which, upon one or the other of the shoulders on the bit shank and block becoming worn, will engage the front of the block and take at least part of the axial load imposed on the bit.

Description

Unite Staes Knifi tent [191 [451 Aug. 20, 1974 1 MINING TOOL AND SUPPORT BLOCK THEREFOR [75] Inventor: Thomas .I. Kniff, Bedford, Pa.
[73] Assignee: Kennametal Inc., Latrobe, Pa.
[22] Filed: Mar. 1, 1973 [21] Appl. No.: 336,935
[52] US. Cl. 299/86, 175/354 [51] Int. Cl. E2lc 35/18 [58] Field of Search 299/86, 91, 92; 175/354 [56] References Cited UNITED STATES PATENTS 3,342,531 9/1967 Krekeler 299/92 FOREIGN PATENTS OR APPLICATIONS 816,565 7/1969 Canada 299/92 Primary ExaminerErnest R. Purser Attorney, Agent, or Firm-Melvin A. Crosby [57] ABSTRACT A mining tool of the pick type which is symmetrical about a longitudinal axis and which has a shank which is circular in cross section that is rotatably received in a correspondingly shaped bore in a support block. The bore in the support block has a forwardly facing shoulder intermediate the ends and the shank of the bit has a rearwardly facing shoulder engaging the forwardly facing shoulder in the bore. The forward face of the support block is flat and perpendicular to the axis of the bore therein and the bit comprises a radial flange which is spaced from the forward end of the block when the bit and block are new but which, upon one or the other of the shoulders on the bit shank and block becoming worn, will engage the front of the block and take at least part of the axial load imposed on the bit.
5 Claims, 2 Drawing Figures 1 MINING TOOL AND SUPPORT BLOCK THEREFOR The present invention relates to mining tools and is particularly concerned with pick type bits and support blocks in which the pick type bits are rotatably supported.
Bits and support blocks of the general nature referred to are known and are illustrated, for example, in US. Pat. Nos. 3,499,685, 3,519,309 and 3,650,565. In each case, the bits and support blocks have interengaging tapered shoulders thereon for absorbing thrusts imposed on the bit during working operations. In many cases, the provision of the tapered shoulders are adequate for supporting the bit throughout its working life and wear on the shoulders is not particularly pronounced.
In its simplest form, the pick and block combination has the tapered load bearing shoulder disposed at the mouth of the bore extending into the block and this has proved to be quite satisfactory for supporting the smaller sized bits. In one of the patents referred to above, the tapered shoulder is disposed about midway in the length of the bore in the block and the shank on the tool is formed to two diameters with a rearwardly facing shoulder at the juncture thereof which engages the shoulder in the block.
This arrangement has been provided for the purpose of permitting a sleeve to be interposed between a small type pick and the block to distribute wear between the pick and sleeve and block while at the same time permitting the sleeve to be withdrawn from the block and replaced by a heavy duty bit having a substantially larger shank than a bit that is receivable in the sleeve.
Such heavy duty picks can operate under loads that would break or bend the small bits and are, thus, employed when hard formations are to be reduced by the mining tool.
As a natural consequence of a formation being hard, fine abrasive particles will be developed which can get into the bore in the block around the shank of the bit and promote wear of the bit shank and of the block. Some of this wear naturally occurs on the shoulders in the block and on the bit but, inasmuch as the bit rotates in the block, there is also wear on the periphery of the bit shank and on the sides of the bore in the block. Such wear has led to the bits becoming loose in the blocks and has led to premature failure of the bits and the wearing out of the blocks before their normallyuseful term of life had expired.
With the foregoing in mind, the present invention has as a primary objective the provision of a bit and block combination in which the bit and block are provided with additional opposed interengageable areas which will come into engagement upon any appreciable wear taking place on the conventional tapered shoulders provided on the bit and block.
A further object is the provision of a bit construction in which access of fine abrasive material into the bore in the block is inhibitedand wherein the operation of the bit is stabilized and made more secure.
These and other objects and advantages of the present invention will become more apparent upon reference to the following detailed specification taken in connection with the accompanying drawings in which:
FIG. 1 is a side view showing a bit according to the present invention mounted in a support block with the bit partially in cross section and the block in full cross section;
FIG. 2 is a fragmentary view similar to FIG. 1 but showing a different arrangement for holding the bit in the bore in the block.
BRIEF SUMMARY OF THE INVENTION According to the present invention, a mining tool support block is provided having a bore extending therethrough from the front end on an axis perpendicular to the front end and with a larger forward part and a smaller rearward part with a forwardly facing tapered shoulder at the juncture of the parts of the bore.
A mining bit having a shank which is circular in cross section iw provided with a shank which is circular in cross section and receivable in the bore in the block with the shank having a rearwardly portion of smaller diameter and a forward portion and a rearwardly facing shoulder at the juncture of said portions; the shoulder on the bit shank engaging the shoulder in the bore. The bit projects forwardly from the front end of the block and has a circular forward portion which tapers inwardly to a point disposed on the longitudinal axis of the bit and which point is advantageously provided by an element of hard wear resistant material such as a cemented hard metallic carbide which is mounted in the forward portion of the bit.
Immediately forwardly of the front face of the block the bit is provided with a rearwardly facing radial shoulder, formed by an annular flange on the bit. The rearwardly facing shoulder is normally spaced at least a slight distance forwardly from the front end of the block but will engage the block when any sensible amount of wear occurs on one or both of the shoulders in the bore of the block and on the shank of the bit.
The radial shoulder at the front end of the block inhibits the entrance of grit into the bore of the block and, furthermore, once it engages or comes quite close to the front end of the block, stabilizes the bit in the block by inhibiting tilting of the bit in the block. Once the radial shoulder on the bit engages the front end of the block, it stabilizes the bit to the fullest extent possible while also sharing in the axial load imposed on the bit during working operations and even more completely sealing the bore in the block against the ingress of fine abrasive material.
DETAILED DESCRIPTION OF THE INVENTION Referring to the drawings somewhat more in detail, in FIG. 1, the support block, indicated at 10, has a bore generally indicated at 12 extending therethrough from front face 14 to rearward face 16 of the block and the axis of which is perpendicular to front face 14. The bore has a smaller rear part 18 and a larger front part 20 and an inclined shoulder 22 at the juncture of said parts and disposed about midway along the length of bore 12.
A pick type bit is adapted for being rotatably mounted in support block 10 and includes a shank generally indicated at 30 having a smaller rearward portion 32 and a larger forward portion 34 and a shoulder 36 connecting portions 32 and 34 and inclined so as to be complementary to shoulder 22 in the bore.
Smaller diameter portion 32 of the shank may extend out of the bore beyond the rear face 16 of the block and having snap ring 38 mounted in a groove 40 provided in the shank so as to retain the shank in the block while permitting free rotation of the shank in the block.
Outwardly from forward face 14 of the block the bit has a forward working portion 42 tapering inwardly to a pointed end 44 and which pointed end is advantageously provided by an insert 46 formed of cemented hard metal carbide, tungsten carbide, for example. Point 44, it will be noted, is on the axis of the bit and the bit is circular at each point therealong and symmetrical about the aforementioned axis.
Immediately forwardly of front face 14 of block the bit has a flange or larger diameter portion 48 which provides a rearwardly facing shoulder radial 50 which is parallel to the plane of front face 14 of the block. When the bit and shank are new, radial shoulder 50 is spaced at least a slight distance forwardly from the front face 14 of block 10 but will engage face 14 when one or the other, or both of the shoulders on the bit shank and in the bore in the block wear down.
At all times, flange 48 tends to inhibit the entrance of abrasive grit into the bore in block 10 and, when shoulder 50 engages front end face 14 of the block, shoulder 50 shares the axial load on the bit and inhibits tilting of the bit in the block, thus, reducing wear on the periphery of the bit shank and on the axial portions of the bore in the block. Further, when shoulder 50 engages face 14, the bore in the block is substantially sealed against the ingress of abrasive grit.
FIG. 2 shows a modification in which the bit, generally designated at 60, is held in the block, designated generally at 62, by a resilient annular spring clip 64 mounted in a groove 66 formed in the shank of the bit and resiliently contractable in the groove to permit the bit to be inserted in the bore in the block and then radially expansible when the bit is positioned in the block so as to engage the annular undercut 68 formed in the bore in the block.
The resilient clip 62 forms a connecting arrangement which will hold the bit in the block while permitting free rotation thereof and, furthermore, permits the bit to be pressed into the block and either pried or driven therefrom quite readily.
What is claimed is:
1. In a mining tool; a bit symmetrical about a longitudinal axis and having a cylindrical shank portion at the rear end with the rearward part of the shank portion substantially smaller in diameter than the forward part thereof and with an inclined rearwardly facing annular shoulder at the juncture of said parts, said bit having a cylindrical working portion at the front end of about the same diameter as the forward part of said shank and terminating in a point at the forward end with the point on said longitudinal axis of the tool, the rear end of said working portion being integrally joined to the forward end of said forward part of said shank portion, and a radially outwardly projecting annular flange at the juncture of said working portion with said shank portion forming a rearwardly facing radial shoulder in a plane substantially perpendicular to the longitudinal axis of the tool.
2. A mining tool according to claim 1 in which the said rearward part of said shank portion includes means for detachably and rotatably retaining said bit in a support block.
3. A mining tool according to claim 1 in which the said rearward and forward parts of said shank portion are about equal in length.
4. A mining tool according to claim 1 in which the length of said forward working portion is about equal to the length of said shank portion.
5. A mining tool according to claim 1 including in combination therewith a support block having a shouldered bore adapted rotatably to receive said shank portion of said bit, the shoulder in said bore facing forwardly and being inclined at the same angle as the inclined shoulder on said shank portion and engaging the inclined shoulder on said shank portion, said block having a forward face with at least the portion surrounding said bore disposed in a plane perpendicular to the axis of said bore, said portion of said forward face of said block being positioned immediately rearwardly of said radial shoulder on said bit so as to be engageable with said radial shoulder in the event of wear of said inclined shoulders.

Claims (5)

1. In a mining tool; a bit symmetrical about a longitudinal axis and having a cylindrical shank portion at the rear end with the rearward part of the shank portion substantially smaller in diameter than the forward part thereof and with an inclined rearwardly facing annular shoulder at the juncture of said parts, said bit having a cylindrical working portion at the front end of about the same diameter as the forward part of said shank and terminating in a point at the forward end with the point on said longitudinal axis of the tool, the rear end of said working portion being integrally joined to the forward end of said forward part of said shank portion, and a radially outwardly projecting annular flange at the juncture of said working portion with said shank portion forming a rearwardly facing radial shoulder in a plane substantially perpendicular to the longitudinal axis of the tool.
2. A mining tool according to claim 1 in which the said rearward part of said shank portion includes means for detachably and rotatably retaining said bit in a support block.
3. A mining tool according to claim 1 in which the said rearward and forward parts of said shank portion are about equal in length.
4. A mining tool according to claim 1 in which the length of said forward working portion is about equal to the length of said shank portion.
5. A mining tool according to claim 1 including in combination therewith a support block having a shouldered bore adapted rotatably to receive said shank portion of said bit, the shoulder in said bore facing forwardly and being inclined at the same angle as the inclined shoulder on said shank portion and engaging the inclined shoulder on said shank portion, said block having a forward face with at least the portion surrounding said bore disposed in a plane perpendicular to the axis of said bore, said portion of said forward face of said block being positioned immediately rearwardly of said radial shoulder on said bit so as to be engageable with said radial shoulder in the evenT of wear of said inclined shoulders.
US00336935A 1973-03-01 1973-03-01 Mining tool and support block therefor Expired - Lifetime US3830546A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00336935A US3830546A (en) 1973-03-01 1973-03-01 Mining tool and support block therefor
ZA00740921A ZA74921B (en) 1973-03-01 1974-02-12 Mining tool and support block therefor
GB643574A GB1453374A (en) 1973-03-01 1974-02-13 Bit assembly for use in mining and excavating
AU65579/74A AU481678B2 (en) 1974-02-14 Mining tool
CA192,543A CA994373A (en) 1973-03-01 1974-02-14 Mining tool and support block therefor
DE2409629A DE2409629B2 (en) 1973-03-01 1974-02-28 Cutter or drill bit arrangement for mining machines
FR7407156A FR2219996B1 (en) 1973-03-01 1974-03-01

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US00336935A US3830546A (en) 1973-03-01 1973-03-01 Mining tool and support block therefor

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US3830546A true US3830546A (en) 1974-08-20

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US00336935A Expired - Lifetime US3830546A (en) 1973-03-01 1973-03-01 Mining tool and support block therefor

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US (1) US3830546A (en)
CA (1) CA994373A (en)
DE (1) DE2409629B2 (en)
FR (1) FR2219996B1 (en)
GB (1) GB1453374A (en)
ZA (1) ZA74921B (en)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240669A (en) * 1978-10-02 1980-12-23 Joy Manufacturing Company Mining cutter bit holder and mounting assemblies
US4938538A (en) * 1983-03-23 1990-07-03 Santrade Limited Excavating tool cutting insert
US5161859A (en) * 1983-03-23 1992-11-10 Santrade Limited Excavating tool cutting insert
US5219209A (en) * 1992-06-11 1993-06-15 Kennametal Inc. Rotatable cutting bit insert
US5324098A (en) * 1992-12-17 1994-06-28 Kennametal Inc. Cutting tool having hard tip with lobes
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
US6607249B2 (en) 1999-12-02 2003-08-19 The Sollami Company Conical bit penetrator pocket protector for earth displacement equipment
US6712431B1 (en) * 1998-12-08 2004-03-30 Genesis Mining Technologies (Pty) Limited Cutting arrangement
US20060261663A1 (en) * 2005-05-19 2006-11-23 Sollami Jimmie L Spring lock mechanism for a ground-engaging
US20060261662A1 (en) * 2005-05-19 2006-11-23 Sollami Jimmie L Spring lock mechanism for a ground-engaging tool
US20060279133A1 (en) * 2005-06-10 2006-12-14 River City Manufacturing Inc. Retaining system for securing a cutting tool to a support block
US20070014644A1 (en) * 2003-09-05 2007-01-18 Shinjo Metal Industries, Ltd. Rotary cutting tool and cutting method using the same
US20100018776A1 (en) * 2008-07-28 2010-01-28 Keller Donald E Cutting bit for mining and excavating tools
CN103334752A (en) * 2013-06-28 2013-10-02 黑龙江科技学院 Duplex pickaxe type cutting tooth holder of drum shearer
US20140232172A1 (en) * 2011-10-11 2014-08-21 Wirtgen Gmbh Shank-Type Pick
US9222354B2 (en) 2011-10-11 2015-12-29 Wirtgen Gmbh Tool system
US9399914B2 (en) 2011-10-11 2016-07-26 Wirtgen Gmbh Tool holder
USD863386S1 (en) 2018-06-06 2019-10-15 Kennametal Inc. Ribbed cutting insert
WO2020101991A1 (en) 2018-11-15 2020-05-22 Caterpillar Inc. Carbide cutter bit with ribbed sides and conical tip

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7529069U (en) * 1975-09-13 1976-02-05 Ugine Carbone, Grenoble (Frankreich) CHISEL HOLDER
DE2644992A1 (en) * 1976-10-06 1978-04-13 Reinhard Wirtgen Road surface stripper cutting mechanism - has lug shaped chisels rotating in radial depression on roller

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1036535A (en) * 1964-05-20 1966-07-20 Hall & Pickles Ltd Improvements in or relating to coal cutter picks and boxes
GB1077171A (en) * 1966-02-01 1967-07-26 Stanley Arthur Hart Improvements in or relating to means for retaining a pick in a box of a coal or like mineral-cutting machine
FR1483463A (en) * 1966-06-15 1967-06-02 Self-sharpening drill bit and its mounting block
US3650565A (en) * 1970-05-04 1972-03-21 Kennametal Inc Pick type mining bit and support block therefor

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4240669A (en) * 1978-10-02 1980-12-23 Joy Manufacturing Company Mining cutter bit holder and mounting assemblies
US4938538A (en) * 1983-03-23 1990-07-03 Santrade Limited Excavating tool cutting insert
US5161859A (en) * 1983-03-23 1992-11-10 Santrade Limited Excavating tool cutting insert
US5219209A (en) * 1992-06-11 1993-06-15 Kennametal Inc. Rotatable cutting bit insert
US5324098A (en) * 1992-12-17 1994-06-28 Kennametal Inc. Cutting tool having hard tip with lobes
US6712431B1 (en) * 1998-12-08 2004-03-30 Genesis Mining Technologies (Pty) Limited Cutting arrangement
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
US6607249B2 (en) 1999-12-02 2003-08-19 The Sollami Company Conical bit penetrator pocket protector for earth displacement equipment
US7306412B2 (en) * 2003-09-05 2007-12-11 Shinjo Metal Industries, Ltd. Rotary milling cutter and milling method using the same technical field
US20070014644A1 (en) * 2003-09-05 2007-01-18 Shinjo Metal Industries, Ltd. Rotary cutting tool and cutting method using the same
US20060261663A1 (en) * 2005-05-19 2006-11-23 Sollami Jimmie L Spring lock mechanism for a ground-engaging
US20060261662A1 (en) * 2005-05-19 2006-11-23 Sollami Jimmie L Spring lock mechanism for a ground-engaging tool
US20060279133A1 (en) * 2005-06-10 2006-12-14 River City Manufacturing Inc. Retaining system for securing a cutting tool to a support block
US20100018776A1 (en) * 2008-07-28 2010-01-28 Keller Donald E Cutting bit for mining and excavating tools
US20140232172A1 (en) * 2011-10-11 2014-08-21 Wirtgen Gmbh Shank-Type Pick
US9144922B2 (en) * 2011-10-11 2015-09-29 Wirtgen Gmbh Shank-type pick
US9222354B2 (en) 2011-10-11 2015-12-29 Wirtgen Gmbh Tool system
US9399914B2 (en) 2011-10-11 2016-07-26 Wirtgen Gmbh Tool holder
CN103334752A (en) * 2013-06-28 2013-10-02 黑龙江科技学院 Duplex pickaxe type cutting tooth holder of drum shearer
USD863386S1 (en) 2018-06-06 2019-10-15 Kennametal Inc. Ribbed cutting insert
WO2020101991A1 (en) 2018-11-15 2020-05-22 Caterpillar Inc. Carbide cutter bit with ribbed sides and conical tip
US11098584B2 (en) 2018-11-15 2021-08-24 Caterpillar Inc. Carbide cutter bit with ribbed sides and conical tip
US11746507B2 (en) 2018-11-15 2023-09-05 Caterpillar Inc. Carbide cutter bit with ribbed sides and conical tip

Also Published As

Publication number Publication date
CA994373A (en) 1976-08-03
GB1453374A (en) 1976-10-20
AU6557974A (en) 1975-08-14
FR2219996A1 (en) 1974-09-27
DE2409629B2 (en) 1975-04-24
DE2409629A1 (en) 1974-09-12
FR2219996B1 (en) 1976-10-08
ZA74921B (en) 1975-01-29

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