US20070024104A1 - Retainer sleeve for a rotary bit - Google Patents

Retainer sleeve for a rotary bit Download PDF

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Publication number
US20070024104A1
US20070024104A1 US11/188,959 US18895905A US2007024104A1 US 20070024104 A1 US20070024104 A1 US 20070024104A1 US 18895905 A US18895905 A US 18895905A US 2007024104 A1 US2007024104 A1 US 2007024104A1
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US
United States
Prior art keywords
cylindrical portion
bit
rearwardly
shank
axis
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US11/188,959
Inventor
Kenneth Monyak
Daniel Mouthaan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik Intellectual Property AB
Original Assignee
Sandvik Intellectual Property AB
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
Application filed by Sandvik Intellectual Property AB filed Critical Sandvik Intellectual Property AB
Priority to US11/188,959 priority Critical patent/US20070024104A1/en
Priority to CA002543514A priority patent/CA2543514A1/en
Priority to AU2006201769A priority patent/AU2006201769A1/en
Priority to GB0608487A priority patent/GB2428709A/en
Priority to DE102006029388A priority patent/DE102006029388A1/en
Assigned to SANDVIK INTELLECTUAL PROPERTY AB reassignment SANDVIK INTELLECTUAL PROPERTY AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MONYAK, KENNETH, MOUTHAAN, DANIEL
Publication of US20070024104A1 publication Critical patent/US20070024104A1/en
Abandoned legal-status Critical Current

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Classifications

    • 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

  • the present invention relates primarily to the retention of rotary bits which are comprised of a hardened steel body with a hard tip and retained by a hardened steel retainer sleeve. These bits are mounted to a holder such as drums, chains and wheels in various orientations and quantity. The bit is then engaged in soft rock formations ranging from asphalt to sandstone. The hard tip fixed to the end of the body directly engages the material being mined or cut.
  • the retainer sleeve permits the bit to rotate freely relative to the holder about the bit's center axis, while being restrained against axial dislodgment from the holder. Due to being freely rotatable, the tip is basically self-sharpening.
  • cutting mechanisms of the type described above have been used to cut through hard materials, such as rock and ice, in addition to cutting through softer materials such as asphalt.
  • hard materials such as rock and ice
  • softer materials such as asphalt.
  • the highest rate of bit wear occurs at the carbide tip, so the wear life of the bit is determined by the life of the carbide tip.
  • relatively softer material such as asphalt, coal, and salt
  • the highest rate of wear occurs at the bit head, i.e. erosion caused by cut asphalt rubbing and impacting against the head.
  • the wear life of the cutting bit is determined by the life of the bit body rather than by the bit tip.
  • Efforts have been made to increase the life of the bit body, such as, for example, disclosed in US 2005/0035649 wherein a ring is provided on a shoulder of the body rearwardly of the tip.
  • the ring is formed of a material harder than the bit body and functions to deflect the substance being cut (e.g., asphalt) in a manner minimizing wear of the bit body.
  • the life of the bit body is increased.
  • the sleeve is typically formed from a sheet of spring steel having a thickness no greater than 0.045 inches.
  • a plurality of tabs are deformed radially inwardly from the cylindrical portion and are received in an annular groove of the bit shank.
  • the tabs are usually formed by a punching operation, resulting in each tab being generally U-shaped or V-shaped as viewed in a direction parallel to the axis (see FIG. 7 ). Due to rotary friction occurring between the sleeve and the bit shaft during a cutting operation, the sleeve eventually becomes worn thin, and becomes more susceptible to deformation. Thus, the sleeves gradually lose their bit-retention properties, enabling the bits to become dislodged. Therefore, it would be desirable to provide a retainer sleeve which has a longer bit-retention life.
  • the sleeve comprises a longitudinally slit cylindrical portion defining a longitudinal axis, and at least four circumferentially spaced tabs deformed generally radially inwardly from the cylindrical portion.
  • the sleeve is formed from a sheet of spring steel having a thickness of at least 0.048 inches.
  • Each tab comprises a connector section inclined from the cylindrical portion in a generally radially inward and longitudinally rearward direction.
  • Each tab further includes a keeper section extending rearwardly from a free end of the connector section.
  • the keeper section includes a first flat surface facing the axis and oriented parallel thereto, and a second flat surface facing rearwardly and oriented perpendicularly to the axis.
  • Another aspect of the invention pertains to a cutting assembly which comprises a rotary bit and the above described retainer sleeve for rotatably holding the rotary bit.
  • FIG. 1 is a side elevational view of a cutting assembly according to the present invention which includes a cutter bit and a retainer sleeve therefore.
  • FIG. 1A is a fragmentary longitudinal sectional view of FIG. 1 depicting the manner in which the retainer sleeve engages a shank of the bit.
  • FIG. 2 is a side elevational view of the retainer sleeve in a relaxed state.
  • FIG. 3 is a longitudinal end view of the retainer sleeve.
  • FIG. 4 is an enlarged fragmentary view of FIG. 3 .
  • FIG. 5 is a view taken in the direction of arrow B of FIG. 4 .
  • FIG. 6 is a sectional view taken along the line 6 - 6 in FIG. 3 .
  • FIG. 7 is a view similar to FIG. 4 of a prior art retainer sleeve.
  • FIGS. 1 and 1 A Depicted in FIGS. 1 and 1 A is a tool holder 40 adapted to be mounted, e.g., bolted or welded, to a vehicle (not shown), and a cutting tool or bit 42 mounted in the holder. There would normally be a plurality of holders 40 and bits 42 mounted on a carrier, such as a rotary drum disposed on the vehicle.
  • the holder can be formed of steel and includes a cylindrical bore 44 extending through a front face 46 of the holder.
  • the bit 42 includes a body formed for example of hardened steel, the body including a front head 50 .
  • a hard cutting tip 52 e.g., formed of cemented carbide
  • the body defines a longitudinal center axis A.
  • the head 50 includes a front annular flange 54 of larger diameter than the bore 44 .
  • the body further includes a shank 56 extending rearwardly from the head 53 , the shank 56 having a smaller diameter than the bore 44 .
  • the body further includes a rear cylindrical flange 58 situated at a rear end of the shank 56 and having a diameter no greater than (preferably equal to) that of the rest of the shank.
  • a rear cylindrical flange 58 situated at a rear end of the shank 56 and having a diameter no greater than (preferably equal to) that of the rest of the shank.
  • an annular radial gap is formed between an outer cylindrical surface of the rear flange 58 and the cylindrical wall of the bore 44 .
  • a rear end 61 of the flange 58 is chamfered to facilitate entry into the bore.
  • the head 50 may include a ring 59 that is harder than the body and attached rearwardly of the tip 52 to reduce erosion of the head as disclosed in U.S. Published Application No. 2005/0035649.
  • the shank includes an annular groove 60 formed therein immediately in front of the rear flange, the groove 60 including a bottom surface 65 .
  • a retainer sleeve 70 formed preferably of hardened steel is disposed between the shank 56 and the cylindrical wall of the bore 44 .
  • the retainer sleeve includes a cylindrical portion 72 which includes a longitudinal slit 75 .
  • the cylindrical portion 72 is long enough to cover substantially all of the shank 56 .
  • the cylindrical portion In a relaxed state ( FIG. 2 ), the cylindrical portion has an outer diameter larger than that of the bore 44 .
  • the cylindrical portion After being radially compressed and positioned in the bore ( FIG. 1 ), the cylindrical portion attempts to rebound outwardly and makes tight contact with the bore wall, while the inner diameter of the compressed cylindrical portion 72 only loosely engages (or avoids engaging) the shank 56 to minimize any obstruction to free rotation of the tool.
  • the retainer sleeve 70 includes at least four circumferentially spaced tongues or tabs 74 bent generally radially inwardly from the cylindrical portion and received in the annular groove 60 to prevent axial dislodgement of the bit from the sleeve while permitting free rotation of the bit. If four tabs 74 are employed, they are circumferentially spaced apart generally equidistantly by an angle ⁇ of about 86° ⁇ 5°.
  • the sleeve is formed from a sheet of hardened spring steel having a thickness T greater than that previously used in the making of retainer sleeves, the thickness T being at least 0.048 in.
  • Prior art retainer sleeves had a thickness no greater than 0.045 in.
  • the sleeve according to the present invention has a longer wear life.
  • the sleeve is more robust and exhibits a greater resistance to being compressed when being installed, so that its rebound strength is increased. Accordingly, it bears more tightly against the wall of the bore 44 and thus exerts greater friction force to resist dislodgement from the bore.
  • each tab 74 is shaped in a manner maximizing their bit-retention properties.
  • tabs Ta have been formed with a U-shape or V-shape as viewed in a direction parallel to the axis A (see FIG. 7 ).
  • the present tabs 74 have a generally rectangular shape as viewed parallel to the axis—see FIG. 3 .
  • the tabs are formed by being punched before the sheet is rolled into a cylindrical shape. More specifically, each tab 74 includes a connector section 74 a which extends from the cylindrical portion 72 in a direction inclined radially inwardly and longitudinally rearwardly (see FIG.
  • the keeper section includes a flat surface 74 b′ facing the axis and lying in a plane parallel to the axis, and a flat rearwardly facing stop surface 74 b′′ lying in a plane perpendicular to the axis A.
  • Each tab could have a width W of about 0.21 inches.
  • each tab Due to its increased thickness of at least 0.048 in., each tab has a longer wear life. Due to the increased thickness, and its generally rectangular shape, each tab is less likely to allow the bit shank to slip forwardly therepast as has occurred in connection with prior art V-shaped or U-shaped tabs.
  • a retainer sleeve according to the present invention exhibits longer life, greater resistance to dislodgement, and better bit-retention than prior and retainer sleeves.

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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)

Abstract

A retainer sleeve for retaining a rotary bit includes a longitudinally slit cylindrical portion defining a longitudinal axis, and at least four circumferentially spaced tabs deformed generally radially inwardly from the cylindrical portion. The sleeve is formed from a sheet of spring steel having a thickness of at least 0.048 inches. Each tab comprises a connector section inclined from the cylindrical portion in a generally radially inward and longitudinally rearward direction and a keeper section extending rearwardly from a free end of the connector section. The keeper section includes a first flat surface facing the axis and oriented parallel thereto, and a second flat surface facing rearwardly and oriented perpendicularly to the axis.

Description

    BACKGROUND OF THE INVENTION
  • The present invention relates primarily to the retention of rotary bits which are comprised of a hardened steel body with a hard tip and retained by a hardened steel retainer sleeve. These bits are mounted to a holder such as drums, chains and wheels in various orientations and quantity. The bit is then engaged in soft rock formations ranging from asphalt to sandstone. The hard tip fixed to the end of the body directly engages the material being mined or cut.
  • The retainer sleeve permits the bit to rotate freely relative to the holder about the bit's center axis, while being restrained against axial dislodgment from the holder. Due to being freely rotatable, the tip is basically self-sharpening.
  • It should be understood that cutting mechanisms of the type described above have been used to cut through hard materials, such as rock and ice, in addition to cutting through softer materials such as asphalt. During the cutting of rock, the highest rate of bit wear occurs at the carbide tip, so the wear life of the bit is determined by the life of the carbide tip. However, during the cutting of relatively softer material, such as asphalt, coal, and salt, the highest rate of wear occurs at the bit head, i.e. erosion caused by cut asphalt rubbing and impacting against the head.
  • Thus, when cutting asphalt during a road resurfacing operation, the wear life of the cutting bit is determined by the life of the bit body rather than by the bit tip. Efforts have been made to increase the life of the bit body, such as, for example, disclosed in US 2005/0035649 wherein a ring is provided on a shoulder of the body rearwardly of the tip. The ring is formed of a material harder than the bit body and functions to deflect the substance being cut (e.g., asphalt) in a manner minimizing wear of the bit body. Thus, the life of the bit body is increased.
  • One consequence of the increased life of the bit body is that the tool life is now often determined by the life of the retainer sleeve (also called a keeper). The sleeve is typically formed from a sheet of spring steel having a thickness no greater than 0.045 inches. A plurality of tabs are deformed radially inwardly from the cylindrical portion and are received in an annular groove of the bit shank. The tabs are usually formed by a punching operation, resulting in each tab being generally U-shaped or V-shaped as viewed in a direction parallel to the axis (see FIG. 7). Due to rotary friction occurring between the sleeve and the bit shaft during a cutting operation, the sleeve eventually becomes worn thin, and becomes more susceptible to deformation. Thus, the sleeves gradually lose their bit-retention properties, enabling the bits to become dislodged. Therefore, it would be desirable to provide a retainer sleeve which has a longer bit-retention life.
    • SUMMARY OF THE INVENTION
  • One aspect of the present invention pertains to a retainer sleeve for retaining a rotary bit. The sleeve comprises a longitudinally slit cylindrical portion defining a longitudinal axis, and at least four circumferentially spaced tabs deformed generally radially inwardly from the cylindrical portion. The sleeve is formed from a sheet of spring steel having a thickness of at least 0.048 inches. Each tab comprises a connector section inclined from the cylindrical portion in a generally radially inward and longitudinally rearward direction. Each tab further includes a keeper section extending rearwardly from a free end of the connector section. The keeper section includes a first flat surface facing the axis and oriented parallel thereto, and a second flat surface facing rearwardly and oriented perpendicularly to the axis.
  • Another aspect of the invention pertains to a cutting assembly which comprises a rotary bit and the above described retainer sleeve for rotatably holding the rotary bit.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The objects and advantages of the invention will become apparent from the following detailed description of a preferred embodiment thereof in connection with the accompanying drawings in which like numerals designate like elements.
  • FIG. 1 is a side elevational view of a cutting assembly according to the present invention which includes a cutter bit and a retainer sleeve therefore.
  • FIG. 1A is a fragmentary longitudinal sectional view of FIG. 1 depicting the manner in which the retainer sleeve engages a shank of the bit.
  • FIG. 2 is a side elevational view of the retainer sleeve in a relaxed state.
  • FIG. 3 is a longitudinal end view of the retainer sleeve.
  • FIG. 4 is an enlarged fragmentary view of FIG. 3.
  • FIG. 5 is a view taken in the direction of arrow B of FIG. 4.
  • FIG. 6 is a sectional view taken along the line 6-6 in FIG. 3.
  • FIG. 7 is a view similar to FIG. 4 of a prior art retainer sleeve.
    • DESCRIPTION OF A PREFERRED EMBODIMENT
  • Depicted in FIGS. 1 and 1A is a tool holder 40 adapted to be mounted, e.g., bolted or welded, to a vehicle (not shown), and a cutting tool or bit 42 mounted in the holder. There would normally be a plurality of holders 40 and bits 42 mounted on a carrier, such as a rotary drum disposed on the vehicle.
  • The holder can be formed of steel and includes a cylindrical bore 44 extending through a front face 46 of the holder.
  • The bit 42 includes a body formed for example of hardened steel, the body including a front head 50. A hard cutting tip 52 (e.g., formed of cemented carbide) is mounted in a front end of the head 50. The body defines a longitudinal center axis A.
  • The head 50 includes a front annular flange 54 of larger diameter than the bore 44. The body further includes a shank 56 extending rearwardly from the head 53, the shank 56 having a smaller diameter than the bore 44.
  • The body further includes a rear cylindrical flange 58 situated at a rear end of the shank 56 and having a diameter no greater than (preferably equal to) that of the rest of the shank. Thus, an annular radial gap is formed between an outer cylindrical surface of the rear flange 58 and the cylindrical wall of the bore 44. A rear end 61 of the flange 58 is chamfered to facilitate entry into the bore.
  • The head 50 may include a ring 59 that is harder than the body and attached rearwardly of the tip 52 to reduce erosion of the head as disclosed in U.S. Published Application No. 2005/0035649.
  • The shank includes an annular groove 60 formed therein immediately in front of the rear flange, the groove 60 including a bottom surface 65.
  • A retainer sleeve 70 formed preferably of hardened steel is disposed between the shank 56 and the cylindrical wall of the bore 44. The retainer sleeve includes a cylindrical portion 72 which includes a longitudinal slit 75. The cylindrical portion 72 is long enough to cover substantially all of the shank 56.
  • In a relaxed state (FIG. 2), the cylindrical portion has an outer diameter larger than that of the bore 44. Thus, after being radially compressed and positioned in the bore (FIG. 1), the cylindrical portion attempts to rebound outwardly and makes tight contact with the bore wall, while the inner diameter of the compressed cylindrical portion 72 only loosely engages (or avoids engaging) the shank 56 to minimize any obstruction to free rotation of the tool.
  • The retainer sleeve 70 includes at least four circumferentially spaced tongues or tabs 74 bent generally radially inwardly from the cylindrical portion and received in the annular groove 60 to prevent axial dislodgement of the bit from the sleeve while permitting free rotation of the bit. If four tabs 74 are employed, they are circumferentially spaced apart generally equidistantly by an angle α of about 86°±5°.
  • In accordance with the present invention, the sleeve is formed from a sheet of hardened spring steel having a thickness T greater than that previously used in the making of retainer sleeves, the thickness T being at least 0.048 in. Prior art retainer sleeves had a thickness no greater than 0.045 in. By increasing the thickness to at least 0.048 in., the sleeve according to the present invention has a longer wear life. Also the sleeve is more robust and exhibits a greater resistance to being compressed when being installed, so that its rebound strength is increased. Accordingly, it bears more tightly against the wall of the bore 44 and thus exerts greater friction force to resist dislodgement from the bore.
  • Also, the tabs 74 are shaped in a manner maximizing their bit-retention properties. Previously, tabs Ta have been formed with a U-shape or V-shape as viewed in a direction parallel to the axis A (see FIG. 7). In contrast, the present tabs 74 have a generally rectangular shape as viewed parallel to the axis—see FIG. 3. The tabs are formed by being punched before the sheet is rolled into a cylindrical shape. More specifically, each tab 74 includes a connector section 74 a which extends from the cylindrical portion 72 in a direction inclined radially inwardly and longitudinally rearwardly (see FIG. 6), and a keeper section 74 b which extends rearwardly from a free end of the connector section 74 a in a direction parallel to the axis A. Thus, the keeper section includes a flat surface 74 b′ facing the axis and lying in a plane parallel to the axis, and a flat rearwardly facing stop surface 74 b″ lying in a plane perpendicular to the axis A. Each tab could have a width W of about 0.21 inches.
  • Due to its increased thickness of at least 0.048 in., each tab has a longer wear life. Due to the increased thickness, and its generally rectangular shape, each tab is less likely to allow the bit shank to slip forwardly therepast as has occurred in connection with prior art V-shaped or U-shaped tabs.
  • It will be appreciated that a retainer sleeve according to the present invention exhibits longer life, greater resistance to dislodgement, and better bit-retention than prior and retainer sleeves.
  • Although the present invention has been described in connection with a preferred embodiment thereof, it will be appreciated by those skilled in the art that additions, deletions, modifications, and substitutions not specifically described may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. A cutting assembly comprising:
a bit defining a longitudinal axis of rotation and comprising a body including a head, and a shank projecting longitudinally rearwardly from the head, the bit further including a hard tip mounted at a front end of the head, the shank including a rear end and an annular groove disposed forwardly of the rear end and extending coaxially with the longitudinal axis, and a ring harder than the body and attached rearwardly of the hard-tip; and
a retainer sleeve including a longitudinally split cylindrical portion extending around the shank and extending substantially to the rear end, and at least four circumferentially spaced tabs deformed generally radially inwardly from the cylindrical portion and received in the annular groove, the sleeve formed of a sheet of spring steel having a thickness of at least 0.048 inches, each tab comprising a connector section inclined from the cylindrical portion in a generally radially inward and longitudinally rearward direction, and a keeper section extending rearwardly from a free end of the connector section, the keeper section including a first flat surface facing the axis and oriented parallel thereto and a second flat surface facing rearwardly and oriented perpendicularly to the axis.
2. The cutter assembly according to claim 1 wherein there are exactly four tabs.
3. (canceled)
4. (canceled)
5. The cutter assembly according to claim 2 wherein the four tabs are circumferentially spaced apart by an angle of about 86±5°.
6. The cutter assembly according to claim 1 wherein the bit includes a cylindrical flange rearward of the annular groove and having a diameter no greater than that of the shank.
7. The cutter assembly according to claim 6 wherein a rear end of the cylindrical flange is chamfered.
US11/188,959 2005-07-26 2005-07-26 Retainer sleeve for a rotary bit Abandoned US20070024104A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US11/188,959 US20070024104A1 (en) 2005-07-26 2005-07-26 Retainer sleeve for a rotary bit
CA002543514A CA2543514A1 (en) 2005-07-26 2006-04-13 Retainer sleeve for a rotary bit
AU2006201769A AU2006201769A1 (en) 2005-07-26 2006-04-27 Retainer sleeve for a rotary bit
GB0608487A GB2428709A (en) 2005-07-26 2006-04-28 Retainer sleeve for a rotary bit
DE102006029388A DE102006029388A1 (en) 2005-07-26 2006-06-27 Cutting tool e.g. rotary bit, holder for attachment at vehicle, has tabs and retainer sleeve that is formed from sheet of spring steel with thickness of certain inches, where each tab has connector section inclined from cylindrical section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/188,959 US20070024104A1 (en) 2005-07-26 2005-07-26 Retainer sleeve for a rotary bit

Publications (1)

Publication Number Publication Date
US20070024104A1 true US20070024104A1 (en) 2007-02-01

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ID=36590034

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/188,959 Abandoned US20070024104A1 (en) 2005-07-26 2005-07-26 Retainer sleeve for a rotary bit

Country Status (5)

Country Link
US (1) US20070024104A1 (en)
AU (1) AU2006201769A1 (en)
CA (1) CA2543514A1 (en)
DE (1) DE102006029388A1 (en)
GB (1) GB2428709A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11053742B1 (en) * 2020-02-21 2021-07-06 Halliburton Energy Services, Inc. Cutter retention for rotatable cutter
US11719098B2 (en) 2021-09-10 2023-08-08 Kennametal Inc. Tool retainer
WO2024026154A1 (en) * 2022-07-29 2024-02-01 Kennametal Inc. Tool retainer

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9303461B2 (en) 2012-10-26 2016-04-05 Baker Hughes Incorporated Cutting elements having curved or annular configurations for earth-boring tools, earth-boring tools including such cutting elements, and related methods
US9388639B2 (en) 2012-10-26 2016-07-12 Baker Hughes Incorporated Rotatable cutting elements and related earth-boring tools and methods

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US4921310A (en) * 1987-06-12 1990-05-01 Hedlund Jan Gunnar Tool for breaking, cutting or working of solid materials
US6378952B1 (en) * 1999-05-14 2002-04-30 Betek Bergbau-Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co., Kg Tool for a coal cutting, mining or road cutting machine
US20020074851A1 (en) * 2000-12-20 2002-06-20 Montgomery Robert H. Protective wear sleeve having tapered lock and retainer
US20020153175A1 (en) * 2001-04-19 2002-10-24 Ojanen Randall W. Rotatable cutting tool with isolated retainer stop
US20020175555A1 (en) * 2001-05-23 2002-11-28 Mercier Greg D. Rotatable cutting bit and retainer sleeve therefor
US20030141753A1 (en) * 2002-01-30 2003-07-31 Kent Peay Rotary cutting bit with material-deflecting ledge
US20040118615A1 (en) * 2002-12-20 2004-06-24 Beach Wayne H. Rotatable bit having a resilient retainer sleeve with clearance
US20050035649A1 (en) * 2003-08-15 2005-02-17 Sandvik Ab Rotary cutting bit with material-deflecting ledge
US20050082899A1 (en) * 2001-11-12 2005-04-21 Levankovsky Igor A. Cutting tool for breaking mineral and artificial materials
US20060033379A1 (en) * 2004-08-12 2006-02-16 Frear Joseph K Cutting tool wear sleeves and retention apparatuses

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UA73489C2 (en) * 1998-12-08 2005-08-15 Genisis Mining Technologies Pr Cutting arrangement and sleeve for it
DE20121298U1 (en) * 2001-07-04 2002-09-05 Betek Bergbau & Hartmetall mounting assembly

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Publication number Priority date Publication date Assignee Title
US4921310A (en) * 1987-06-12 1990-05-01 Hedlund Jan Gunnar Tool for breaking, cutting or working of solid materials
US6378952B1 (en) * 1999-05-14 2002-04-30 Betek Bergbau-Und Hartmetalltechnik Karl-Heinz Simon Gmbh & Co., Kg Tool for a coal cutting, mining or road cutting machine
US20020074851A1 (en) * 2000-12-20 2002-06-20 Montgomery Robert H. Protective wear sleeve having tapered lock and retainer
US6786557B2 (en) * 2000-12-20 2004-09-07 Kennametal Inc. Protective wear sleeve having tapered lock and retainer
US20020153175A1 (en) * 2001-04-19 2002-10-24 Ojanen Randall W. Rotatable cutting tool with isolated retainer stop
US20020175555A1 (en) * 2001-05-23 2002-11-28 Mercier Greg D. Rotatable cutting bit and retainer sleeve therefor
US6702393B2 (en) * 2001-05-23 2004-03-09 Sandvik Rock Tools, Inc. Rotatable cutting bit and retainer sleeve therefor
US20050082899A1 (en) * 2001-11-12 2005-04-21 Levankovsky Igor A. Cutting tool for breaking mineral and artificial materials
US20030141753A1 (en) * 2002-01-30 2003-07-31 Kent Peay Rotary cutting bit with material-deflecting ledge
US20040118615A1 (en) * 2002-12-20 2004-06-24 Beach Wayne H. Rotatable bit having a resilient retainer sleeve with clearance
US20050035649A1 (en) * 2003-08-15 2005-02-17 Sandvik Ab Rotary cutting bit with material-deflecting ledge
US20060033379A1 (en) * 2004-08-12 2006-02-16 Frear Joseph K Cutting tool wear sleeves and retention apparatuses

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11053742B1 (en) * 2020-02-21 2021-07-06 Halliburton Energy Services, Inc. Cutter retention for rotatable cutter
US11719098B2 (en) 2021-09-10 2023-08-08 Kennametal Inc. Tool retainer
WO2024026154A1 (en) * 2022-07-29 2024-02-01 Kennametal Inc. Tool retainer
US11898446B1 (en) 2022-07-29 2024-02-13 Kennametal Inc. Tool retainer

Also Published As

Publication number Publication date
AU2006201769A1 (en) 2007-02-15
DE102006029388A1 (en) 2007-02-01
CA2543514A1 (en) 2007-01-26
GB0608487D0 (en) 2006-06-07
GB2428709A (en) 2007-02-07

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