US3807804A - Impacting tool with tungsten carbide insert tip - Google Patents

Impacting tool with tungsten carbide insert tip Download PDF

Info

Publication number
US3807804A
US3807804A US00288292A US28829272A US3807804A US 3807804 A US3807804 A US 3807804A US 00288292 A US00288292 A US 00288292A US 28829272 A US28829272 A US 28829272A US 3807804 A US3807804 A US 3807804A
Authority
US
United States
Prior art keywords
bore
tool according
impacting tool
holder
impact member
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.)
Expired - Lifetime
Application number
US00288292A
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English (en)
Inventor
T Kniff
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.)
EAGLE SIGNAL CONTROLS CORP A CORP OF DE
Kennametal Inc
Original Assignee
Kennametal Inc
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 Kennametal Inc filed Critical Kennametal Inc
Priority to US00288292A priority Critical patent/US3807804A/en
Priority to CA180,255A priority patent/CA963652A/en
Priority to GB4141873A priority patent/GB1403137A/en
Priority to JP10099373A priority patent/JPS5543868B2/ja
Priority to FR7332852A priority patent/FR2198812B1/fr
Priority to DE19732345965 priority patent/DE2345965A1/de
Application granted granted Critical
Publication of US3807804A publication Critical patent/US3807804A/en
Assigned to EAGLE SIGNAL CONTROLS CORP., A CORP. OF DE. reassignment EAGLE SIGNAL CONTROLS CORP., A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: WICKES MANUFACTURING COMPANY, A DE. CORP.
Assigned to WICKES MANUFACTURING COMPANY, A CORP. OF DE. reassignment WICKES MANUFACTURING COMPANY, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GULF & WESTERN INDUSTRIES, INC., FORMERLY GULF & WESTERN INDUSTRIES, INC.,
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits

Definitions

  • the massive carbide element can be press fitted in the steel holder or shrink fitted therein or brazed thereto and, furthermore, the carbide element can be fitted to a steel sleeve adapted for being secured to a steel holder as by threading or brazing.
  • the present invention relates to an impact tool, especially to a heavy duty impact tool adapted for being driven by a motor against a formation or rock to be broken.
  • Impacting tools are known in which an arrangement is provided for driving an impact tool against a rock or formation to be broken or reduced.
  • Reciprocating motors can be employed for reciprocating the impact tool and the motor can either be fluid operated or pneumatically operated.
  • Such impact tools are also adapted for being dropped under the influence of a weight against a region to be impacted thereby.
  • hard steel has been employed as the impact tool, or at least the working end of the impact tool, has been formed of hard steel or has been hard faced.
  • Such impact tools havebeen provided with small inserts of hard cemented metal carbide material and this greatly improves the wear resistance of the, working end of the tool but, nevertheless, the steel in which the carbide elements are mounted tends to wear away leaving the elements exposed and will sometimes mushroom and create difficulties.
  • the present invention proposes the provision of an impact tool of the nature referred to which avoids the drawbacks referred to above in connection with prior art impact tools.
  • a particular object of the present invention is the provision of an impact tool in which only a single massive wear resistant element is provided as opposed to the provision of multiple wear resistant elements.
  • Still another object is the provision of an impact point arrangement for an impact tool which can be fitted to a worn impact tool, or detachably mounted on an impact tool formed in such a manner as to receive the point.
  • FIG. 1 is a fragmentary view partly in section showing the working end of an impact tool according to the present invention.
  • FIG. 2 is a view like FIG. 1 but shows a modification.
  • FIG. 3 is a view like FIG. 1 but shows still another modification.
  • FIG. 4 is a fragmentary sectional view showing how a pocket could be formed in the steel holder of the tool for receiving shavings when the hard wear resistant tip is pressed into the holder.
  • FIG. 5 is a view similar to FIG. 4 but shows another manner of forming the pocket for receiving shavings.
  • a steel member of substantial size which is adapted for being impelled forcibly in the axial direction against a formation or a rock which is to be reduced or broken tungsten carbide, is mounted in the working end of the steel member and provides a hard wear resistant tip by means of which the tool impacts on the formation or rock.
  • the steel member thus forms a holder and is referred to herein in this manner.
  • the carbide can be pressed into the steel holder or shrink fitted therein or brazed in position or otherwise secured to the steel holder so as to be fixed thereto.
  • the end of the piece of carbide disposed in the steel holder takes a bearing directly on the holder and is, thus, efiicient for transferring the energy from the holder into the work engaged by the outer end of the carbide piece.
  • the carbide piece can be mounted directly in the holder, or it can be mounted in steel retaining ring which is welded to the end of a steel holder or threadedly engaged therewith.
  • 10 indicates a steel body adapted to reciprocate in the direction of arrow 12 so as to drive the working end thereof against a formation or rock.
  • the body 10 forms a holder for a hard wear resistant tip and the lower end of the holder is formed with an axial bore 14 and mounted therein is a massive tip element 16 formed of hard wear resistant material, in particular, cemented metal carbide, especially cemented tungsten carbide.
  • the tip element 16 has a cylindrical portion closely fitting in bore 14 and outwardly beyond the lower end of holder 10 tapers inwardly along a first region 18 at one angle and then tapers inwardly more sharply along a second region 20 to a point.
  • the holder 10 commencing at about the lower end of the cylindrical region of tip element 16 tapers out-- element 16 thereby providing for a shrink fit of the tip 1 element in the holder or the tip element can be brazed into the holder by placing it in bore 14 with braze material in surrounding relation thereto and heating the holder and tip element to brazing temperature.
  • tip element 16 at 26 takes a firm solid bearing on the surface at the bottom of bore 14 for an efficient transfer of energy from holder 10 into tip element 16.
  • a tip element 16 can be fixed in a steel support ring 28 and the steel support ring 28 welded, as by welding 30 to the lower end of a steel holder 32 which has been cut off to receive the ring 28.
  • both ring 28 and holder 32 are cut off to provide an annular V-shaped recess in which the welding material 30 is received.
  • Tip element 16 in FIG. 2 extends completely through ring 28 and it will be noted that the upper end 26 thereof takes a full and solid bearing on the lower end of holder 32.
  • tip element 16 is fitted in a steel ring 34 which is provided with threads 36 at the upper end adapted threadedly to engage threads 38 formed on holder 40.
  • ring 34 is torqued up tight on holder 40, the upper end 26 of tip element 16 will take a firm bearing on the downwardly facing lower end of holder 40.
  • tip element 16 can be press fitted into the holder and FIG. 4 shows how a holder 42 could be provided with a pocket 44 adjacent the bottom of the bore in which tip element 16 is pressed so that any shavings taken from the holder by the tip element during the pressing of the tip element into the bore in the holder will be received in the pocket 44 and will not be disposed between the inner end 26 of tip element 16 and the bottom wall of the bore in the holder.
  • FIG. 5 shows a manner in which a tip element 16a could be provided with a region thereof at the inner end at 46 somewhat reduced in diameter thereby to provide a pocket 48 for receiving any shavings taken by the tip element as it is pressed into the holder.
  • FIGS. 4 and 5 show arrangements wherein the inner end of the tip element takes a full solid bearing on the bottom of the bore in the holder when the tip element is pressed into the holder.
  • the pockets of FIGS. 4 and 5 are not required for the FIGS. 2 and 3 modifications because the rings shown therein in which the tip elements are mounted can be freed of shavings before assembly with the holder.
  • such a carbide tip element might be 1% inches in diameter by about 5 inches long and could weigh as much as about 6 pounds.
  • steel holder means steel holder means, a blind cylindrical bore extending into said holder means from the working end thereof, and an impact member in the form of a single cylindrical piece of cemented hard metal carbide material fixed in said bore and having a pointed end protruding from the working end of said holder means, the axially inner end of said impact member bearing directly on the bottom of said bore in load transmitting relation thereto.
  • An impacting tool according to claim 1 in which the pointed outer end of said member comprises a first portion at the point having a wide angle and a second portion adjacent thereto having a narrow angle.
  • said holder means comprises a first axial portion at the working end through which said bore extends, and a second axial portion connected to said first portion and having a region forming the bottom of said bore.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
US00288292A 1972-09-12 1972-09-12 Impacting tool with tungsten carbide insert tip Expired - Lifetime US3807804A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US00288292A US3807804A (en) 1972-09-12 1972-09-12 Impacting tool with tungsten carbide insert tip
CA180,255A CA963652A (en) 1972-09-12 1973-09-04 Impacting tool
GB4141873A GB1403137A (en) 1972-09-12 1973-09-04 Impacting tool
JP10099373A JPS5543868B2 (fi) 1972-09-12 1973-09-07
FR7332852A FR2198812B1 (fi) 1972-09-12 1973-09-12
DE19732345965 DE2345965A1 (de) 1972-09-12 1973-09-12 Schlagwerkzeug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00288292A US3807804A (en) 1972-09-12 1972-09-12 Impacting tool with tungsten carbide insert tip

Publications (1)

Publication Number Publication Date
US3807804A true US3807804A (en) 1974-04-30

Family

ID=23106513

Family Applications (1)

Application Number Title Priority Date Filing Date
US00288292A Expired - Lifetime US3807804A (en) 1972-09-12 1972-09-12 Impacting tool with tungsten carbide insert tip

Country Status (6)

Country Link
US (1) US3807804A (fi)
JP (1) JPS5543868B2 (fi)
CA (1) CA963652A (fi)
DE (1) DE2345965A1 (fi)
FR (1) FR2198812B1 (fi)
GB (1) GB1403137A (fi)

Cited By (109)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005906A (en) * 1975-12-15 1977-02-01 Kennametal Inc. Impact or demolition tool
US4047583A (en) * 1976-06-01 1977-09-13 Dresser Industries, Inc. Earth boring cutting element retention system
US4077734A (en) * 1976-06-29 1978-03-07 Kennametal Inc. Insert for mining tools and the like
DE2807353A1 (de) * 1977-03-03 1978-09-07 Sandvik Ab Gesteins-bohrspitze
US4289211A (en) * 1977-03-03 1981-09-15 Sandvik Aktiebolag Rock drill bit
US4655508A (en) * 1983-09-05 1987-04-07 Tomlinson Peter N Tool component
US4678237A (en) * 1982-08-06 1987-07-07 Huddy Diamond Crown Setting Company (Proprietary) Limited Cutter inserts for picks
US4725099A (en) * 1985-07-18 1988-02-16 Gte Products Corporation Rotatable cutting bit
US4804231A (en) * 1985-06-24 1989-02-14 Gte Laboratories Incorporated Point attack mine and road milling tool with replaceable cutter tip
US4865392A (en) * 1985-07-18 1989-09-12 Gte Products Corporation Rotatable cutting bit
US5131481A (en) * 1990-12-19 1992-07-21 Kennametal Inc. Insert having a surface of carbide particles
US5582494A (en) * 1985-10-15 1996-12-10 Cook; Harold D. Tool holder system and method of use
US5975816A (en) * 1997-07-09 1999-11-02 Cook; Harold D. Harmonic dampener for rotary tool holder
US5979912A (en) * 1997-07-09 1999-11-09 Cook; Harold D. Heavy-metal shrink fit cutting tool mount
US6035512A (en) * 1997-07-09 2000-03-14 Cook; Harold D. Machine tool extension and method of forming the same
US6109842A (en) * 1999-08-03 2000-08-29 Cook; Harold D. Tool holder with harmonic dampening drive mechanism
US6161309A (en) * 1999-04-28 2000-12-19 Cook; Harold D. Heat shrink tool holder cooler
US6234729B1 (en) 1999-04-28 2001-05-22 Harold D. Cook Shrink fit shoulder interface
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
US6382888B2 (en) 1997-07-09 2002-05-07 Harold D Cook Vibration dampened spindle and tool holder assembly
US6425716B1 (en) 2000-04-13 2002-07-30 Harold D. Cook Heavy metal burr tool
US20050035649A1 (en) * 2003-08-15 2005-02-17 Sandvik Ab Rotary cutting bit with material-deflecting ledge
US6932172B2 (en) * 2000-11-30 2005-08-23 Harold A. Dvorachek Rotary contact structures and cutting elements
US20070290547A1 (en) * 2006-06-16 2007-12-20 Hall David R Superhard Composite Material Bonded to a Steel Body
US20070290546A1 (en) * 2006-06-16 2007-12-20 Hall David R A Wear Resistant Tool
US7320505B1 (en) 2006-08-11 2008-01-22 Hall David R Attack tool
US20080036271A1 (en) * 2006-08-11 2008-02-14 Hall David R Method for Providing a Degradation Drum
US20080035380A1 (en) * 2006-08-11 2008-02-14 Hall David R Pointed Diamond Working Ends on a Shear Bit
US20080036274A1 (en) * 2006-08-11 2008-02-14 Hall David R Sleeve in a Degradation Assembly
US20080036280A1 (en) * 2006-08-11 2008-02-14 Hall David R Pick Assembly
US20080036275A1 (en) * 2006-08-11 2008-02-14 Hall David R Retainer Sleeve in a Degradation Assembly
US20080036276A1 (en) * 2006-08-11 2008-02-14 Hall David R Lubricated Pick
US20080035386A1 (en) * 2006-08-11 2008-02-14 Hall David R Pick Assembly
US20080035383A1 (en) * 2006-08-11 2008-02-14 Hall David R Non-rotating Pick with a Pressed in Carbide Segment
US20080036269A1 (en) * 2006-08-11 2008-02-14 Hall David R Hollow Pick Shank
US20080036283A1 (en) * 2006-08-11 2008-02-14 Hall David R Attack Tool
US20080036279A1 (en) * 2006-08-11 2008-02-14 Hall David R Holder for a degradation assembly
US20080035387A1 (en) * 2006-08-11 2008-02-14 Hall David R Downhole Drill Bit
US20080054707A1 (en) * 2006-09-01 2008-03-06 Hall David R Formation Breaking Assembly
US7347292B1 (en) 2006-10-26 2008-03-25 Hall David R Braze material for an attack tool
US20080088172A1 (en) * 2006-08-11 2008-04-17 Hall David R Holder Assembly
US20080099250A1 (en) * 2006-10-26 2008-05-01 Hall David R Superhard Insert with an Interface
US20080115977A1 (en) * 2006-08-11 2008-05-22 Hall David R Impact Tool
US7384105B2 (en) 2006-08-11 2008-06-10 Hall David R Attack tool
US7387345B2 (en) 2006-08-11 2008-06-17 Hall David R Lubricating drum
US7396086B1 (en) 2007-03-15 2008-07-08 Hall David R Press-fit pick
US20080185468A1 (en) * 2006-08-11 2008-08-07 Hall David R Degradation insert with overhang
US7413256B2 (en) 2006-08-11 2008-08-19 Hall David R Washer for a degradation assembly
US20080197691A1 (en) * 2006-08-11 2008-08-21 Hall David R Locking fixture for a degradation assembly
US20080211290A1 (en) * 2006-08-11 2008-09-04 Hall David R Tapered Bore in a Pick
US20080246329A1 (en) * 2006-08-11 2008-10-09 Hall David R Retention System
US20080250724A1 (en) * 2007-04-12 2008-10-16 Hall David R High Impact Shearing Element
US20080264697A1 (en) * 2006-08-11 2008-10-30 Hall David R Retention for an Insert
US7445294B2 (en) 2006-08-11 2008-11-04 Hall David R Attack tool
US20080284234A1 (en) * 2007-05-14 2008-11-20 Hall David R Pick with a Reentrant
US20080284235A1 (en) * 2007-05-15 2008-11-20 Hall David R Spring Loaded Pick
US20080309149A1 (en) * 2006-08-11 2008-12-18 Hall David R Braze Thickness Control
US20080309147A1 (en) * 2006-08-11 2008-12-18 Hall David R Shield of a Degradation Assembly
US20090051211A1 (en) * 2006-10-26 2009-02-26 Hall David R Thick Pointed Superhard Material
US20090066149A1 (en) * 2007-09-07 2009-03-12 Hall David R Pick with Carbide Cap
US20090133938A1 (en) * 2006-08-11 2009-05-28 Hall David R Thermally Stable Pointed Diamond with Increased Impact Resistance
US20090155010A1 (en) * 2007-12-17 2009-06-18 Cook Harold D Tool holder dampening system
US20090160238A1 (en) * 2007-12-21 2009-06-25 Hall David R Retention for Holder Shank
US20090200855A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
US20090200857A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
US20090205811A1 (en) * 2008-02-19 2009-08-20 Cook Harold D Heat shrink tool holder cooling cart
US20090267403A1 (en) * 2006-08-11 2009-10-29 Hall David R Resilient Pick Shank
US7628233B1 (en) 2008-07-23 2009-12-08 Hall David R Carbide bolster
US7648210B2 (en) 2006-08-11 2010-01-19 Hall David R Pick with an interlocked bolster
US7669938B2 (en) 2006-08-11 2010-03-02 Hall David R Carbide stem press fit into a steel body of a pick
US20100054875A1 (en) * 2006-08-11 2010-03-04 Hall David R Test Fixture that Positions a Cutting Element at a Positive Rake Angle
US7722127B2 (en) 2006-08-11 2010-05-25 Schlumberger Technology Corporation Pick shank in axial tension
US7740414B2 (en) 2005-03-01 2010-06-22 Hall David R Milling apparatus for a paved surface
WO2010085730A1 (en) * 2009-01-26 2010-07-29 Kennametal Inc. Cold-formed cutting tool
US20100237135A1 (en) * 2006-08-11 2010-09-23 Schlumberger Technology Corporation Methods For Making An Attack Tool
US20100242375A1 (en) * 2009-03-30 2010-09-30 Hall David R Double Sintered Thermally Stable Polycrystalline Diamond Cutting Elements
US20100263939A1 (en) * 2006-10-26 2010-10-21 Hall David R High Impact Resistant Tool with an Apex Width between a First and Second Transitions
US20100264721A1 (en) * 2009-04-16 2010-10-21 Hall David R Seal with Rigid Element for Degradation Assembly
US20100275425A1 (en) * 2009-04-29 2010-11-04 Hall David R Drill Bit Cutter Pocket Restitution
US7832808B2 (en) 2007-10-30 2010-11-16 Hall David R Tool holder sleeve
US20100326740A1 (en) * 2009-06-26 2010-12-30 Hall David R Bonded Assembly Having Low Residual Stress
ITMI20091205A1 (it) * 2009-07-08 2011-01-09 Delfino Giuseppe Utensile manuale per materiale lapideo e mazzetta per tale utensile
EP2305433A1 (en) 2009-10-05 2011-04-06 Giancarlo Di Mario Impact demolition tool
US7950746B2 (en) 2006-06-16 2011-05-31 Schlumberger Technology Corporation Attack tool for degrading materials
US20110175430A1 (en) * 2010-01-20 2011-07-21 Ernst Heiderich Pick tool and method for making same
US20110198818A1 (en) * 2004-06-14 2011-08-18 Franz Haimer Maschinenbau Kg Tool holder for a rotary tool
US8007051B2 (en) 2006-08-11 2011-08-30 Schlumberger Technology Corporation Shank assembly
US20110241407A1 (en) * 2008-05-20 2011-10-06 Sandvik Intellectual Property Ab Carbide block and sleeve wear surface
US8061457B2 (en) 2009-02-17 2011-11-22 Schlumberger Technology Corporation Chamfered pointed enhanced diamond insert
EP2465644A1 (en) * 2010-12-20 2012-06-20 Giovanni Andrina Percussion tool for a demolishing hammer or the like
US8250786B2 (en) 2010-06-30 2012-08-28 Hall David R Measuring mechanism in a bore hole of a pointed cutting element
US8414085B2 (en) 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US8485609B2 (en) 2006-08-11 2013-07-16 Schlumberger Technology Corporation Impact tool
US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US8646848B2 (en) 2007-12-21 2014-02-11 David R. Hall Resilient connection between a pick shank and block
US8668275B2 (en) 2011-07-06 2014-03-11 David R. Hall Pick assembly with a contiguous spinal region
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US8728382B2 (en) 2011-03-29 2014-05-20 David R. Hall Forming a polycrystalline ceramic in multiple sintering phases
US8777326B2 (en) 2012-01-23 2014-07-15 David R. Hall Pick with hardened core assembly
US20150035344A1 (en) * 2013-07-31 2015-02-05 David R. Hall Pick Tool with a Removable Shank
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US9068410B2 (en) 2006-10-26 2015-06-30 Schlumberger Technology Corporation Dense diamond body
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit
WO2016153364A3 (en) * 2015-03-20 2018-04-26 Bihasa Ismael L Chipping bit
WO2020163621A1 (en) * 2019-02-07 2020-08-13 Milwaukee Electric Tool Corporation Hammer with hardened textured hammer face
US11707818B2 (en) * 2019-09-20 2023-07-25 Milwaukee Electric Tool Corporation Two-piece hammer for impact tool
US11833651B2 (en) 2019-02-07 2023-12-05 Milwaukee Electric Tool Corporation Hammer with hardened textured striking face

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6061182U (ja) * 1983-10-01 1985-04-27 三菱マテリアル株式会社 ブレ−カ−ノミ
CS261223B2 (en) * 1984-02-07 1989-01-12 Alsthom Atlantique Instrument for impacts generation
JPS619279U (ja) * 1984-06-25 1986-01-20 新キャタピラ−三菱株式会社 油圧ブレ−カ−用チゼル
DE4218134A1 (de) * 1992-06-02 1993-12-09 Lorenz Halder Verfahren und Werkzeug zum Abbau von Boden- oder Wandbeschichtungen
DK9400350U3 (da) * 1994-09-13 1995-12-13 American Tool Comp Inc Boreopsætning for hammermaskiner
EP2502708B1 (en) 2011-03-22 2017-02-01 Black & Decker Inc. Chisels
DE102011075137A1 (de) * 2011-05-03 2012-11-08 Robert Bosch Gmbh Handgeführtes Elektrowerkzeug mit einem schwingfähigen Anregungsaktor
USD734792S1 (en) 2013-03-15 2015-07-21 Black & Decker Inc. Drill bit
USD737875S1 (en) 2013-03-15 2015-09-01 Black & Decker Inc. Drill bit

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161062A (en) * 1934-03-24 1939-06-06 Robert J Killgore Percussion tool
US3268260A (en) * 1962-03-24 1966-08-23 Minsup Mining Supplies Mounting boxes and picks for coal-cutting machines
US3356418A (en) * 1965-01-09 1967-12-05 Tungsten Carbide Developments Coal-cutter pick with hard metal tip and method of making

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2065898A (en) * 1932-09-15 1936-12-29 Union Carbide & Carbon Corp Tool and method of making same
GB1114156A (en) * 1964-09-01 1968-05-15 Coal Industry Patents Ltd Improvements in or relating to cutter picks
US3382940A (en) * 1965-10-21 1968-05-14 Frank E. Stebley Percussion drill bit
US3459073A (en) * 1967-06-12 1969-08-05 Timken Roller Bearing Co Rock bit assembly and bit insert assembly process

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2161062A (en) * 1934-03-24 1939-06-06 Robert J Killgore Percussion tool
US3268260A (en) * 1962-03-24 1966-08-23 Minsup Mining Supplies Mounting boxes and picks for coal-cutting machines
US3356418A (en) * 1965-01-09 1967-12-05 Tungsten Carbide Developments Coal-cutter pick with hard metal tip and method of making

Cited By (194)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4005906A (en) * 1975-12-15 1977-02-01 Kennametal Inc. Impact or demolition tool
US4047583A (en) * 1976-06-01 1977-09-13 Dresser Industries, Inc. Earth boring cutting element retention system
US4077734A (en) * 1976-06-29 1978-03-07 Kennametal Inc. Insert for mining tools and the like
DE2807353A1 (de) * 1977-03-03 1978-09-07 Sandvik Ab Gesteins-bohrspitze
US4181187A (en) * 1977-03-03 1980-01-01 Sandvik Aktiebolag Rock drill bit with stress relief insert sockets
US4289211A (en) * 1977-03-03 1981-09-15 Sandvik Aktiebolag Rock drill bit
US4678237A (en) * 1982-08-06 1987-07-07 Huddy Diamond Crown Setting Company (Proprietary) Limited Cutter inserts for picks
US4655508A (en) * 1983-09-05 1987-04-07 Tomlinson Peter N Tool component
US4804231A (en) * 1985-06-24 1989-02-14 Gte Laboratories Incorporated Point attack mine and road milling tool with replaceable cutter tip
US4725099A (en) * 1985-07-18 1988-02-16 Gte Products Corporation Rotatable cutting bit
US4865392A (en) * 1985-07-18 1989-09-12 Gte Products Corporation Rotatable cutting bit
USRE38151E1 (en) 1985-07-18 2003-06-24 Kennametal Inc. Rotatable cutting bit
US5582494A (en) * 1985-10-15 1996-12-10 Cook; Harold D. Tool holder system and method of use
US5131481A (en) * 1990-12-19 1992-07-21 Kennametal Inc. Insert having a surface of carbide particles
US6071219A (en) * 1997-07-09 2000-06-06 Cook; Harold D. Method and apparatus for mitigating vibration associated with rotary cutting machines
US6035512A (en) * 1997-07-09 2000-03-14 Cook; Harold D. Machine tool extension and method of forming the same
US5975816A (en) * 1997-07-09 1999-11-02 Cook; Harold D. Harmonic dampener for rotary tool holder
US6382888B2 (en) 1997-07-09 2002-05-07 Harold D Cook Vibration dampened spindle and tool holder assembly
US5979912A (en) * 1997-07-09 1999-11-09 Cook; Harold D. Heavy-metal shrink fit cutting tool mount
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
US6161309A (en) * 1999-04-28 2000-12-19 Cook; Harold D. Heat shrink tool holder cooler
US6234729B1 (en) 1999-04-28 2001-05-22 Harold D. Cook Shrink fit shoulder interface
US6109842A (en) * 1999-08-03 2000-08-29 Cook; Harold D. Tool holder with harmonic dampening drive mechanism
US6425716B1 (en) 2000-04-13 2002-07-30 Harold D. Cook Heavy metal burr tool
US6932172B2 (en) * 2000-11-30 2005-08-23 Harold A. Dvorachek Rotary contact structures and cutting elements
US20050035649A1 (en) * 2003-08-15 2005-02-17 Sandvik Ab Rotary cutting bit with material-deflecting ledge
US7204560B2 (en) 2003-08-15 2007-04-17 Sandvik Intellectual Property Ab Rotary cutting bit with material-deflecting ledge
US8439369B2 (en) * 2004-06-14 2013-05-14 Franz Haimer Maschinenbau Kg Tool holder for a rotary tool
US20110198818A1 (en) * 2004-06-14 2011-08-18 Franz Haimer Maschinenbau Kg Tool holder for a rotary tool
US7740414B2 (en) 2005-03-01 2010-06-22 Hall David R Milling apparatus for a paved surface
US20070290547A1 (en) * 2006-06-16 2007-12-20 Hall David R Superhard Composite Material Bonded to a Steel Body
US20070290546A1 (en) * 2006-06-16 2007-12-20 Hall David R A Wear Resistant Tool
US7950746B2 (en) 2006-06-16 2011-05-31 Schlumberger Technology Corporation Attack tool for degrading materials
US7469972B2 (en) 2006-06-16 2008-12-30 Hall David R Wear resistant tool
US7568770B2 (en) * 2006-06-16 2009-08-04 Hall David R Superhard composite material bonded to a steel body
US7669674B2 (en) 2006-08-11 2010-03-02 Hall David R Degradation assembly
US7600823B2 (en) 2006-08-11 2009-10-13 Hall David R Pick assembly
US20080035383A1 (en) * 2006-08-11 2008-02-14 Hall David R Non-rotating Pick with a Pressed in Carbide Segment
US20080036269A1 (en) * 2006-08-11 2008-02-14 Hall David R Hollow Pick Shank
US20080036283A1 (en) * 2006-08-11 2008-02-14 Hall David R Attack Tool
US20080036279A1 (en) * 2006-08-11 2008-02-14 Hall David R Holder for a degradation assembly
US20080035387A1 (en) * 2006-08-11 2008-02-14 Hall David R Downhole Drill Bit
US7338135B1 (en) 2006-08-11 2008-03-04 Hall David R Holder for a degradation assembly
US8118371B2 (en) 2006-08-11 2012-02-21 Schlumberger Technology Corporation Resilient pick shank
US8136887B2 (en) 2006-08-11 2012-03-20 Schlumberger Technology Corporation Non-rotating pick with a pressed in carbide segment
US8061784B2 (en) 2006-08-11 2011-11-22 Schlumberger Technology Corporation Retention system
US20080088172A1 (en) * 2006-08-11 2008-04-17 Hall David R Holder Assembly
US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US20080115977A1 (en) * 2006-08-11 2008-05-22 Hall David R Impact Tool
US7384105B2 (en) 2006-08-11 2008-06-10 Hall David R Attack tool
US7387345B2 (en) 2006-08-11 2008-06-17 Hall David R Lubricating drum
US7390066B2 (en) 2006-08-11 2008-06-24 Hall David R Method for providing a degradation drum
US10378288B2 (en) 2006-08-11 2019-08-13 Schlumberger Technology Corporation Downhole drill bit incorporating cutting elements of different geometries
US8033615B2 (en) 2006-08-11 2011-10-11 Schlumberger Technology Corporation Retention system
US20080185468A1 (en) * 2006-08-11 2008-08-07 Hall David R Degradation insert with overhang
US7410221B2 (en) 2006-08-11 2008-08-12 Hall David R Retainer sleeve in a degradation assembly
US7413256B2 (en) 2006-08-11 2008-08-19 Hall David R Washer for a degradation assembly
US20080197691A1 (en) * 2006-08-11 2008-08-21 Hall David R Locking fixture for a degradation assembly
US7419224B2 (en) 2006-08-11 2008-09-02 Hall David R Sleeve in a degradation assembly
US20080211290A1 (en) * 2006-08-11 2008-09-04 Hall David R Tapered Bore in a Pick
US20080246329A1 (en) * 2006-08-11 2008-10-09 Hall David R Retention System
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit
US20080258536A1 (en) * 2006-08-11 2008-10-23 Hall David R High-impact Resistant Tool
US20080264697A1 (en) * 2006-08-11 2008-10-30 Hall David R Retention for an Insert
US7445294B2 (en) 2006-08-11 2008-11-04 Hall David R Attack tool
US9708856B2 (en) 2006-08-11 2017-07-18 Smith International, Inc. Downhole drill bit
US8033616B2 (en) 2006-08-11 2011-10-11 Schlumberger Technology Corporation Braze thickness control
US7464993B2 (en) 2006-08-11 2008-12-16 Hall David R Attack tool
US20080309149A1 (en) * 2006-08-11 2008-12-18 Hall David R Braze Thickness Control
US20080309147A1 (en) * 2006-08-11 2008-12-18 Hall David R Shield of a Degradation Assembly
US20080309146A1 (en) * 2006-08-11 2008-12-18 Hall David R Degradation assembly shield
US20080309148A1 (en) * 2006-08-11 2008-12-18 Hall David R Degradation Assembly Shield
US7469971B2 (en) 2006-08-11 2008-12-30 Hall David R Lubricated pick
US20080036276A1 (en) * 2006-08-11 2008-02-14 Hall David R Lubricated Pick
US7475948B2 (en) 2006-08-11 2009-01-13 Hall David R Pick with a bearing
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
US9366089B2 (en) 2006-08-11 2016-06-14 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US8029068B2 (en) 2006-08-11 2011-10-04 Schlumberger Technology Corporation Locking fixture for a degradation assembly
US20090133938A1 (en) * 2006-08-11 2009-05-28 Hall David R Thermally Stable Pointed Diamond with Increased Impact Resistance
US20090146489A1 (en) * 2006-08-11 2009-06-11 Hall David R Retention System
US8007051B2 (en) 2006-08-11 2011-08-30 Schlumberger Technology Corporation Shank assembly
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US20080036275A1 (en) * 2006-08-11 2008-02-14 Hall David R Retainer Sleeve in a Degradation Assembly
US20090200855A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
US20090200857A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
US8007050B2 (en) 2006-08-11 2011-08-30 Schlumberger Technology Corporation Degradation assembly
US20080036271A1 (en) * 2006-08-11 2008-02-14 Hall David R Method for Providing a Degradation Drum
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US7997661B2 (en) 2006-08-11 2011-08-16 Schlumberger Technology Corporation Tapered bore in a pick
US20090267403A1 (en) * 2006-08-11 2009-10-29 Hall David R Resilient Pick Shank
US20090294182A1 (en) * 2006-08-11 2009-12-03 Hall David R Degradation Assembly
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
US7635168B2 (en) 2006-08-11 2009-12-22 Hall David R Degradation assembly shield
US7637574B2 (en) 2006-08-11 2009-12-29 Hall David R Pick assembly
US7648210B2 (en) 2006-08-11 2010-01-19 Hall David R Pick with an interlocked bolster
US7661765B2 (en) 2006-08-11 2010-02-16 Hall David R Braze thickness control
US7992944B2 (en) 2006-08-11 2011-08-09 Schlumberger Technology Corporation Manually rotatable tool
US20080036280A1 (en) * 2006-08-11 2008-02-14 Hall David R Pick Assembly
US7669938B2 (en) 2006-08-11 2010-03-02 Hall David R Carbide stem press fit into a steel body of a pick
US20100054875A1 (en) * 2006-08-11 2010-03-04 Hall David R Test Fixture that Positions a Cutting Element at a Positive Rake Angle
US7992945B2 (en) 2006-08-11 2011-08-09 Schlumberger Technology Corporation Hollow pick shank
US7712693B2 (en) 2006-08-11 2010-05-11 Hall David R Degradation insert with overhang
US7717365B2 (en) 2006-08-11 2010-05-18 Hall David R Degradation insert with overhang
US7722127B2 (en) 2006-08-11 2010-05-25 Schlumberger Technology Corporation Pick shank in axial tension
US20080036274A1 (en) * 2006-08-11 2008-02-14 Hall David R Sleeve in a Degradation Assembly
US7744164B2 (en) 2006-08-11 2010-06-29 Schluimberger Technology Corporation Shield of a degradation assembly
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US8567532B2 (en) 2006-08-11 2013-10-29 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US20100237135A1 (en) * 2006-08-11 2010-09-23 Schlumberger Technology Corporation Methods For Making An Attack Tool
US8534767B2 (en) 2006-08-11 2013-09-17 David R. Hall Manually rotatable tool
US20080035386A1 (en) * 2006-08-11 2008-02-14 Hall David R Pick Assembly
US8500209B2 (en) 2006-08-11 2013-08-06 Schlumberger Technology Corporation Manually rotatable tool
US8500210B2 (en) 2006-08-11 2013-08-06 Schlumberger Technology Corporation Resilient pick shank
US7832809B2 (en) 2006-08-11 2010-11-16 Schlumberger Technology Corporation Degradation assembly shield
US8485609B2 (en) 2006-08-11 2013-07-16 Schlumberger Technology Corporation Impact tool
US8454096B2 (en) 2006-08-11 2013-06-04 Schlumberger Technology Corporation High-impact resistant tool
US8453497B2 (en) 2006-08-11 2013-06-04 Schlumberger Technology Corporation Test fixture that positions a cutting element at a positive rake angle
US7871133B2 (en) 2006-08-11 2011-01-18 Schlumberger Technology Corporation Locking fixture
US8449040B2 (en) 2006-08-11 2013-05-28 David R. Hall Shank for an attack tool
US7320505B1 (en) 2006-08-11 2008-01-22 Hall David R Attack tool
US8434573B2 (en) 2006-08-11 2013-05-07 Schlumberger Technology Corporation Degradation assembly
US8414085B2 (en) 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US7946657B2 (en) 2006-08-11 2011-05-24 Schlumberger Technology Corporation Retention for an insert
US7946656B2 (en) 2006-08-11 2011-05-24 Schlumberger Technology Corporation Retention system
US20080035380A1 (en) * 2006-08-11 2008-02-14 Hall David R Pointed Diamond Working Ends on a Shear Bit
US7963617B2 (en) 2006-08-11 2011-06-21 Schlumberger Technology Corporation Degradation assembly
US7503628B2 (en) * 2006-09-01 2009-03-17 Hall David R Formation breaking assembly
US20080054707A1 (en) * 2006-09-01 2008-03-06 Hall David R Formation Breaking Assembly
US7588102B2 (en) 2006-10-26 2009-09-15 Hall David R High impact resistant tool
US20090051211A1 (en) * 2006-10-26 2009-02-26 Hall David R Thick Pointed Superhard Material
US20100263939A1 (en) * 2006-10-26 2010-10-21 Hall David R High Impact Resistant Tool with an Apex Width between a First and Second Transitions
US8960337B2 (en) 2006-10-26 2015-02-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
US9068410B2 (en) 2006-10-26 2015-06-30 Schlumberger Technology Corporation Dense diamond body
US8028774B2 (en) 2006-10-26 2011-10-04 Schlumberger Technology Corporation Thick pointed superhard material
US7665552B2 (en) 2006-10-26 2010-02-23 Hall David R Superhard insert with an interface
US8109349B2 (en) 2006-10-26 2012-02-07 Schlumberger Technology Corporation Thick pointed superhard material
US9540886B2 (en) 2006-10-26 2017-01-10 Schlumberger Technology Corporation Thick pointed superhard material
US10029391B2 (en) 2006-10-26 2018-07-24 Schlumberger Technology Corporation High impact resistant tool with an apex width between a first and second transitions
US20080099250A1 (en) * 2006-10-26 2008-05-01 Hall David R Superhard Insert with an Interface
US7353893B1 (en) 2006-10-26 2008-04-08 Hall David R Tool with a large volume of a superhard material
US7347292B1 (en) 2006-10-26 2008-03-25 Hall David R Braze material for an attack tool
US20100065338A1 (en) * 2006-10-26 2010-03-18 Hall David R Thick Pointed Superhard Material
US8365845B2 (en) 2007-02-12 2013-02-05 Hall David R High impact resistant tool
US7396086B1 (en) 2007-03-15 2008-07-08 Hall David R Press-fit pick
US7401863B1 (en) 2007-03-15 2008-07-22 Hall David R Press-fit pick
US20080250724A1 (en) * 2007-04-12 2008-10-16 Hall David R High Impact Shearing Element
US9051794B2 (en) 2007-04-12 2015-06-09 Schlumberger Technology Corporation High impact shearing element
US20080284234A1 (en) * 2007-05-14 2008-11-20 Hall David R Pick with a Reentrant
US7594703B2 (en) 2007-05-14 2009-09-29 Hall David R Pick with a reentrant
US20110080036A1 (en) * 2007-05-15 2011-04-07 Schlumberger Technology Corporation Spring Loaded Pick
US20080284235A1 (en) * 2007-05-15 2008-11-20 Hall David R Spring Loaded Pick
US8342611B2 (en) 2007-05-15 2013-01-01 Schlumberger Technology Corporation Spring loaded pick
US7926883B2 (en) 2007-05-15 2011-04-19 Schlumberger Technology Corporation Spring loaded pick
US20090066149A1 (en) * 2007-09-07 2009-03-12 Hall David R Pick with Carbide Cap
US8038223B2 (en) 2007-09-07 2011-10-18 Schlumberger Technology Corporation Pick with carbide cap
US7832808B2 (en) 2007-10-30 2010-11-16 Hall David R Tool holder sleeve
US20090155010A1 (en) * 2007-12-17 2009-06-18 Cook Harold D Tool holder dampening system
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US8646848B2 (en) 2007-12-21 2014-02-11 David R. Hall Resilient connection between a pick shank and block
US20090160238A1 (en) * 2007-12-21 2009-06-25 Hall David R Retention for Holder Shank
US7886560B2 (en) 2008-02-19 2011-02-15 Cook Harold D Heat shrink tool holder cooling cart
US20090205811A1 (en) * 2008-02-19 2009-08-20 Cook Harold D Heat shrink tool holder cooling cart
US8931854B2 (en) 2008-04-30 2015-01-13 Schlumberger Technology Corporation Layered polycrystalline diamond
US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
US20110241407A1 (en) * 2008-05-20 2011-10-06 Sandvik Intellectual Property Ab Carbide block and sleeve wear surface
US8657385B2 (en) * 2008-05-20 2014-02-25 Sandvik Intellectual Property Ab Carbide block and sleeve wear surface
US7628233B1 (en) 2008-07-23 2009-12-08 Hall David R Carbide bolster
US20100187896A1 (en) * 2009-01-26 2010-07-29 Kennametal Inc. Cold-formed cutting tool
WO2010085730A1 (en) * 2009-01-26 2010-07-29 Kennametal Inc. Cold-formed cutting tool
US8079648B2 (en) 2009-01-26 2011-12-20 Kennametal Inc. Cold-formed cutting tool
US8061457B2 (en) 2009-02-17 2011-11-22 Schlumberger Technology Corporation Chamfered pointed enhanced diamond insert
US20100242375A1 (en) * 2009-03-30 2010-09-30 Hall David R Double Sintered Thermally Stable Polycrystalline Diamond Cutting Elements
US20100264721A1 (en) * 2009-04-16 2010-10-21 Hall David R Seal with Rigid Element for Degradation Assembly
US8322796B2 (en) 2009-04-16 2012-12-04 Schlumberger Technology Corporation Seal with contact element for pick shield
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
US20100275425A1 (en) * 2009-04-29 2010-11-04 Hall David R Drill Bit Cutter Pocket Restitution
US20100326740A1 (en) * 2009-06-26 2010-12-30 Hall David R Bonded Assembly Having Low Residual Stress
ITMI20091205A1 (it) * 2009-07-08 2011-01-09 Delfino Giuseppe Utensile manuale per materiale lapideo e mazzetta per tale utensile
EP2305433A1 (en) 2009-10-05 2011-04-06 Giancarlo Di Mario Impact demolition tool
US20110175430A1 (en) * 2010-01-20 2011-07-21 Ernst Heiderich Pick tool and method for making same
US9028009B2 (en) * 2010-01-20 2015-05-12 Element Six Gmbh Pick tool and method for making same
US9033425B2 (en) 2010-01-20 2015-05-19 Element Six Gmbh Pick tool and method for making same
US8250786B2 (en) 2010-06-30 2012-08-28 Hall David R Measuring mechanism in a bore hole of a pointed cutting element
US8459751B2 (en) 2010-12-20 2013-06-11 Giovanni Andrina Percussion tool for a demolishing hammer or the like
ITTO20101023A1 (it) * 2010-12-20 2012-06-21 Giovanni Andrina Utensile di percussione per un martello demolitore o simile.
EP2465644A1 (en) * 2010-12-20 2012-06-20 Giovanni Andrina Percussion tool for a demolishing hammer or the like
US8728382B2 (en) 2011-03-29 2014-05-20 David R. Hall Forming a polycrystalline ceramic in multiple sintering phases
US8668275B2 (en) 2011-07-06 2014-03-11 David R. Hall Pick assembly with a contiguous spinal region
US8777326B2 (en) 2012-01-23 2014-07-15 David R. Hall Pick with hardened core assembly
US20150035344A1 (en) * 2013-07-31 2015-02-05 David R. Hall Pick Tool with a Removable Shank
WO2016153364A3 (en) * 2015-03-20 2018-04-26 Bihasa Ismael L Chipping bit
WO2020163621A1 (en) * 2019-02-07 2020-08-13 Milwaukee Electric Tool Corporation Hammer with hardened textured hammer face
US11833651B2 (en) 2019-02-07 2023-12-05 Milwaukee Electric Tool Corporation Hammer with hardened textured striking face
US11707818B2 (en) * 2019-09-20 2023-07-25 Milwaukee Electric Tool Corporation Two-piece hammer for impact tool

Also Published As

Publication number Publication date
JPS5543868B2 (fi) 1980-11-08
CA963652A (en) 1975-03-04
JPS4994000A (fi) 1974-09-06
FR2198812B1 (fi) 1978-04-28
FR2198812A1 (fi) 1974-04-05
GB1403137A (en) 1975-08-13
DE2345965A1 (de) 1974-03-28

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