US3493268A - Cutter bit - Google Patents

Cutter bit Download PDF

Info

Publication number
US3493268A
US3493268A US464370A US3493268DA US3493268A US 3493268 A US3493268 A US 3493268A US 464370 A US464370 A US 464370A US 3493268D A US3493268D A US 3493268DA US 3493268 A US3493268 A US 3493268A
Authority
US
United States
Prior art keywords
bit
shank
block
cutter
cutter bit
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
US464370A
Other languages
English (en)
Inventor
Arnold B Bower Jr
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.)
Hughes Tool Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US3493268A publication Critical patent/US3493268A/en
Assigned to HUGHES TOOL COMPANY A CORP OF DE reassignment HUGHES TOOL COMPANY A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: GENERAL ELECTRIC COMPANY
Assigned to HUGHES TOOL COMPANY - USA, A CORP OF DE reassignment HUGHES TOOL COMPANY - USA, A CORP OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HUGHES TOOL COMPANY, A CORP OF DE
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • 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
    • E21C35/184—Reversible picks, i.e. having two working ends, one operating, the other in reserve

Definitions

  • a cutter bit having a generally cylindrical shank and a cutter tip mounted centrally at both axial extremities of the shank.
  • the center portion of the cutter bit contains a radially projecting shoulder encircling the shank, providing seating surfaces for the bit on both sides thereof, so that the bit may be reversibly held in a block.
  • Circumferential recesses between the shoulder and both cutter tips are adapted to receive holding means to retain the bit in a block.
  • Cutter bit This invention relates to a cutter bit, and more specifically to a cutter bit of the type used in mining machines.
  • Cutter bits of the type having a generally cylindrical shank and a cutter tip mounted at a central axial extrimity of the shank are known and have been used to advantage in mining machines.
  • Such cutter bits possess the advantage, as contrasted with rectangular bits in which the cutting tip is mounted radially offset from the central axis, of having the cutting forces operate through a larger cross section of both the bit body and the block in which it is mounted.
  • the principal object of the present invention is to provide a cutter bit, of the type having a generally cylindrical shank and a centrally located cutting tip, with cutting tips at both ends thereof so that the bit is reversible, thereby having approximately twice the life of previous cutter bits of this type but nevertheless retaining its advantages.
  • the reversible cutter bit of the present invention comprises a generally cylindrical shank having cutting tips at its axial opposite ends and a raised or projecting collar at its approximate axial midpoint.
  • the collar provides dual seating or bearing surfaces for the cutter bit when it is positioned in a block in which it is held.
  • the shank contains two circumferential recesses, one between each of the cutting tips and the central collar to receive a holding means for retaining the bit in a block.
  • FIGURE 1 is an elevational view, partially in section, of a block of the type used in the mining of coal with the bit of the invention mounted for operation therein;
  • FIGURE 2 is a side elevational view of the cutter bit shown in FIG. 1;
  • FIGURE 3 is a fragmentary side elevational view showing an alternate tip design.
  • FIG. 1 shows a block 1 having a cylindrical bore 2 in which is mounted a reversible cutter bit 3 of the invention.
  • the bit 3 may form a relatively loose fit in the bore 2 for easy insertion and removal of the bit and for rotation of the bit in the block during operation.
  • the forward end of bore 2 is flared to provide a seating or bearing surface 4 for the corresponding bearing surface 5' (FIG. 2) of the bit.
  • the cutter bit 3 is held in block 1 by means of a retention pin 6 fitting a hole 7 through the block.
  • a plurality of blocks of the type shown in FIG. 1 may be attached to a mining machine in conventional fashinon, as by welding or other suitable means.
  • the cutter bit comprises a generally cylindrical shank 8 having identical cutting tips 9 and 9' of cemented tungsten carbide at axially opposite ends thereof.
  • Shank 8 is conically tapered at 10 and 10' toward cutting tips 9 and 9' respectively at both ends of the shank.
  • the central portion of the shank contains a raised rim or collar 11 projecting annularly around the axial center of the cutter bit.
  • the collar 11 is tapered radially on both sides thereof to provide annular seating surfaces 5 and 5' for the bit When the bit is held in the block.
  • a continuous curved circumferential recess 12 and 12' between the collar 11 and each tip 9 and 9' respectively is adapted to receive a holding pin to prevent removal of the bit from the block (as shown in FIG. 1).
  • the cutting tips may assume a variety of shapes.
  • the exposed portion of the tips may be conical and terminate in a point or they may even be cylindrical and terminate in a fiat cutting surface.
  • the drawing illustrates two such shapes.
  • the exposed portions of tips 9 and 9' are tetrahedral and contain a plurality of surfaces 13 and 13' which terminate in a sharp cutting point 14 and 14' and which together form a generally tetrahedral shaped cutting tip at both ends of the shank.
  • the base 15 and 15' of the tips 9 and 9, which are brazed to the bit by conventional brazing techniques, are of cylindrical shape.
  • FIG. 3 illustrates an alternate tip shape in which the projecting portion of tip 16 is of hemispheroidal shape.
  • the tip is otherwise the same as tips 9 and 9 of FIGS. 1 and 2.
  • the cutter bit is symmetrical .about a plane radially bisecting the shank, i.e., a plane passing perpendicular to the axis of the bit through the center of collar 11 in FIG. .2.
  • Such symmetry is of course necessary if the cutter bit is to be truly reversible in the block in which it is mounted to present two cutting tips in substantially identical operating position.
  • the design of the bit is such that it is also symmetrical about a plane passing through the central axis of the bit. Such design is desirable to permit rotation of the bit in the block during cutting, or to permit utilization of the bit regardless of its particular position of rotation around its central axis when inserted in the block.
  • a reversible cutter bit comprising a generally cylindrical shank having cutting tips at central axially opposite ends thereof, said shank being conically tapered at said opposite ends toward said cutting tips,
  • said shank containing a continuous circumferential recess along a cylindrical portion thereof between said collar and the conically tapered portions of said shank to receive a holding pin adapted to retain said bit rotatably in a block,
  • said bit being symmetrical about both its central axis and a plane radially bisecting the shank, the shank being in the shape of a right cylinder except for the conically tapered opposite ends thereof, the tapered radially projecting collar and the circumferential recess.
  • a bit member comprising: a body symmetrical about a central longitudinal axis and having an enlarged diameter region in about the middle of the length thereof with tapered shoulders on opposite sides, the body on each side of said region being smaller in diameter than said region and including a cylindrical region operable to serve as a supporting shank for the bit member, the body on each end terminating in a point, an element harder than said body carried by said body at each said point, a support block having a bore for receiving the shank of the bit member, and means for retaining such shank in said bore against axial movement therein while permitting free rotation of said body on said axis.

Landscapes

  • 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)
US464370A 1965-06-16 1965-06-16 Cutter bit Expired - Lifetime US3493268A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US46437065A 1965-06-16 1965-06-16

Publications (1)

Publication Number Publication Date
US3493268A true US3493268A (en) 1970-02-03

Family

ID=23843673

Family Applications (1)

Application Number Title Priority Date Filing Date
US464370A Expired - Lifetime US3493268A (en) 1965-06-16 1965-06-16 Cutter bit

Country Status (5)

Country Link
US (1) US3493268A (is")
BE (1) BE682651A (is")
DE (1) DE1280177B (is")
GB (1) GB1117694A (is")
NL (1) NL6608342A (is")

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4159746A (en) * 1976-04-14 1979-07-03 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Bit of circular cross-section
US4298233A (en) * 1979-06-07 1981-11-03 Gerd Elfgen Milling tool for a rotating milling cylinder
US4729603A (en) * 1984-11-22 1988-03-08 Gerd Elfgen Round cutting tool for cutters
US5054217A (en) * 1987-03-25 1991-10-08 Sandvik Ab Hard insert for ice/snow clearing tool
US5791837A (en) * 1996-08-16 1998-08-11 Johnson; Samuel Annular tool for cutting holes in metal
US5810102A (en) * 1996-08-23 1998-09-22 Stewart; Gary L. Reversible bit assembly
US20050127742A1 (en) * 2003-12-11 2005-06-16 River City Manufacturing Inc. Retaining system for securing a cutting tool to a support block
US6926100B1 (en) * 2002-03-12 2005-08-09 Xtech Industries International, Inc. Hole reaming apparatus and method
US20080202819A1 (en) * 2007-02-27 2008-08-28 Sandvik Intellectual Property Ab Reversible cutting tool with shield
DE102008010694A1 (de) 2007-02-27 2008-08-28 Sandvik Intellectual Property Ab Wendbares Schneidwerkzeug mit Schild
US20080206002A1 (en) * 2007-02-27 2008-08-28 Sandvik Intellectual Property Ab Sleeve for reversible cutting tool
US20130008992A1 (en) * 2011-07-06 2013-01-10 Harney William L Pick retainer
US20160271778A1 (en) * 2015-03-21 2016-09-22 Chih Kuan Hsieh Fixing Structure for Cylinder
US9724701B2 (en) 2013-03-12 2017-08-08 Joy Mm Delaware, Inc. Tapered pick holder
US9828742B2 (en) 2014-01-31 2017-11-28 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements
WO2018106300A1 (en) * 2016-12-07 2018-06-14 Alliance Coal, Llc Double headed drill bit for a continuous coal mining machine
US10352163B2 (en) 2014-01-31 2019-07-16 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2509302C2 (de) * 1975-03-04 1983-10-13 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Meißelanordnung für einen Hobel

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2107942A (en) * 1934-07-30 1938-02-08 Sullivan Machinery Co Cutter chain
US2186502A (en) * 1933-06-27 1940-01-09 Sullivan Machinery Co Cutter chain
US2610049A (en) * 1949-10-18 1952-09-09 Elles Albert Charles Bit
US2774570A (en) * 1954-05-03 1956-12-18 Hughes Tool Co Roller cutter for earth drills
US3148002A (en) * 1959-05-05 1964-09-08 Cincinnati Mine Machinery Co Double-ended cutter bit and socket construction
US3268260A (en) * 1962-03-24 1966-08-23 Minsup Mining Supplies Mounting boxes and picks for coal-cutting machines
US3342531A (en) * 1965-02-16 1967-09-19 Cincinnati Mine Machinery Co Conical cutter bits held by resilient retainer for free rotation
US3342532A (en) * 1965-03-15 1967-09-19 Cincinnati Mine Machinery Co Cutting tool comprising holder freely rotatable in socket with bit frictionally attached

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1078082A (en) * 1913-02-10 1913-11-11 James B Blackman Cutting-bit for chains of mining-machines.
GB576831A (en) * 1943-01-29 1946-04-23 Frank Leonard Fulke Improvements in or relating to a mining machine chain bit and holder therefor
GB993070A (en) * 1963-03-04 1965-05-26 Austin Hoy & Co Ltd Coal cutter pick and cutter tip inserts therefor

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2186502A (en) * 1933-06-27 1940-01-09 Sullivan Machinery Co Cutter chain
US2107942A (en) * 1934-07-30 1938-02-08 Sullivan Machinery Co Cutter chain
US2610049A (en) * 1949-10-18 1952-09-09 Elles Albert Charles Bit
US2774570A (en) * 1954-05-03 1956-12-18 Hughes Tool Co Roller cutter for earth drills
US3148002A (en) * 1959-05-05 1964-09-08 Cincinnati Mine Machinery Co Double-ended cutter bit and socket construction
US3268260A (en) * 1962-03-24 1966-08-23 Minsup Mining Supplies Mounting boxes and picks for coal-cutting machines
US3342531A (en) * 1965-02-16 1967-09-19 Cincinnati Mine Machinery Co Conical cutter bits held by resilient retainer for free rotation
US3342532A (en) * 1965-03-15 1967-09-19 Cincinnati Mine Machinery Co Cutting tool comprising holder freely rotatable in socket with bit frictionally attached

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4159746A (en) * 1976-04-14 1979-07-03 Vereinigte Osterreichische Eisen- Und Stahlwerke-Alpine Montan Aktiengesellschaft Bit of circular cross-section
US4298233A (en) * 1979-06-07 1981-11-03 Gerd Elfgen Milling tool for a rotating milling cylinder
US4729603A (en) * 1984-11-22 1988-03-08 Gerd Elfgen Round cutting tool for cutters
US5054217A (en) * 1987-03-25 1991-10-08 Sandvik Ab Hard insert for ice/snow clearing tool
US5791837A (en) * 1996-08-16 1998-08-11 Johnson; Samuel Annular tool for cutting holes in metal
US5810102A (en) * 1996-08-23 1998-09-22 Stewart; Gary L. Reversible bit assembly
US6926100B1 (en) * 2002-03-12 2005-08-09 Xtech Industries International, Inc. Hole reaming apparatus and method
US7108082B1 (en) 2002-03-12 2006-09-19 Xtech Industries International, Inc. Hole reaming apparatus and method
US20050127742A1 (en) * 2003-12-11 2005-06-16 River City Manufacturing Inc. Retaining system for securing a cutting tool to a support block
US20080206002A1 (en) * 2007-02-27 2008-08-28 Sandvik Intellectual Property Ab Sleeve for reversible cutting tool
DE102008008954B4 (de) * 2007-02-27 2013-07-18 Sandvik Intellectual Property Ab Hülse für austauschbares Schneidwerkzeug
DE102008008954A1 (de) 2007-02-27 2008-08-28 Sandvik Intellectual Property Ab Hülse für austauschbares Schneidwerkzeug
US20080202819A1 (en) * 2007-02-27 2008-08-28 Sandvik Intellectual Property Ab Reversible cutting tool with shield
US7611209B2 (en) * 2007-02-27 2009-11-03 Sandvik Intellectual Property Ab Reversible cutting tool with shield
US8104844B2 (en) * 2007-02-27 2012-01-31 Sandvik Intellectual Property Ab Sleeve for reversible cutting tool
DE102008010694B4 (de) * 2007-02-27 2015-10-01 Sandvik Intellectual Property Ab Wendbares Schneidwerkzeug mit Schild
DE102008010694A1 (de) 2007-02-27 2008-08-28 Sandvik Intellectual Property Ab Wendbares Schneidwerkzeug mit Schild
US20130008992A1 (en) * 2011-07-06 2013-01-10 Harney William L Pick retainer
US9757730B2 (en) * 2011-07-06 2017-09-12 Joy Mm Delaware, Inc. Pick retainer
US9724701B2 (en) 2013-03-12 2017-08-08 Joy Mm Delaware, Inc. Tapered pick holder
US9828742B2 (en) 2014-01-31 2017-11-28 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements
US10352163B2 (en) 2014-01-31 2019-07-16 Leroy G. Hagenbuch Cutter assembly with freewheeling cutting elements
US20160271778A1 (en) * 2015-03-21 2016-09-22 Chih Kuan Hsieh Fixing Structure for Cylinder
WO2018106300A1 (en) * 2016-12-07 2018-06-14 Alliance Coal, Llc Double headed drill bit for a continuous coal mining machine

Also Published As

Publication number Publication date
NL6608342A (is") 1966-12-19
BE682651A (is") 1966-12-01
DE1280177B (de) 1968-10-17
GB1117694A (en) 1968-06-19

Similar Documents

Publication Publication Date Title
US3493268A (en) Cutter bit
US4702525A (en) Conical bit
US4026605A (en) Mining tool
US3512838A (en) Pick-type mining tool
US4678237A (en) Cutter inserts for picks
JPH11173051A (ja) 点切削バイト
US1838520A (en) Turning and boring tool
US3442342A (en) Specially shaped inserts for compact rock bits,and rolling cutters and rock bits using such inserts
US3331637A (en) Cutter bits and mounting means therefor
US5374111A (en) Extraction undercut for flanged bits
US3957307A (en) Rough cutter mining tool
US4327947A (en) Keeper spring for connecting mining tool to work tool holder
US3841709A (en) Excavating tool arrangement
US3650565A (en) Pick type mining bit and support block therefor
GB2168404A (en) A cutting tool
US4159746A (en) Bit of circular cross-section
US3830546A (en) Mining tool and support block therefor
US20160273356A1 (en) Cutting tool assembly including retainer sleeve with retention member
US5810102A (en) Reversible bit assembly
EP0236086B1 (en) An insert for a tool
US2650071A (en) Mining drill
US4917196A (en) Excavating tooth for an earth auger
US20180156036A1 (en) Double headed drill bit for a continuous coal mining machine
US1969040A (en) Drill bit
US2865606A (en) Rock drill

Legal Events

Date Code Title Description
AS Assignment

Owner name: HUGHES TOOL COMPANY A CORP OF DE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GENERAL ELECTRIC COMPANY;REEL/FRAME:003967/0068

Effective date: 19820216

AS Assignment

Owner name: HUGHES TOOL COMPANY - USA, A CORP OF DE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HUGHES TOOL COMPANY, A CORP OF DE;REEL/FRAME:004368/0605

Effective date: 19850205