US3830321A - Excavating tool and a bit for use therewith - Google Patents

Excavating tool and a bit for use therewith Download PDF

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Publication number
US3830321A
US3830321A US33386973A US3830321A US 3830321 A US3830321 A US 3830321A US 33386973 A US33386973 A US 33386973A US 3830321 A US3830321 A US 3830321A
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United States
Prior art keywords
shank
bit
head portion
portion
ring
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Expired - Lifetime
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Inventor
Kenry R Mc
M College
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Kennametal Inc
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Kennametal Inc
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Priority to US33386973 priority Critical patent/US3830321A/en
Priority claimed from AU65813/74A external-priority patent/AU480802B2/en
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Publication of US3830321A publication Critical patent/US3830321A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C35/00Miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam
    • E21C35/18Mining picks; Holders therefor
    • E21C35/183Mining picks; Holders therefor with inserts or layers of wear-resistant material
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/02Core bits
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/26Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/62Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C25/00Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/02Machines slitting solely by one or more percussive tools moved through the seam
    • E21C25/04Cutting crowns or other tools
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C35/00Miscellaneous items relating to machines for slitting or completely freeing the mineral from the seam
    • E21C35/18Mining picks; Holders therefor
    • E21C2035/1803Inserts or layers of wear-resistant material
    • E21C2035/1816Inserts or layers of wear-resistant material characterised by the shape

Abstract

An excavating tool and a bit for use therewith in which the bit is of small dimensions and is mounted in a block in which the bit is rotatable and which block is configured in such a manner that it can be welded to various types of holders so that a plurality of blocks and bits mounted on a holder make an excavating tool of selected style and size.

Description

United States atent [191 McKenry et al.

[ EXCAVATING TOOL AND A BIT FOR USE THEREWITH [75] Inventors: Robert J. McKenry, Windber;

Michael A. College, Everett, both of Pa.

[73] Assignee: Kennametal lnc., Latrobe, Pa.

[22] Filed: Feb. 20, 1973 [21] Appl. No.: 333,869

52 U.S.Cl ..17s/332,175/335,175/354,

.7 2 9 59 [51 Int.Cl. ..E21b9/12,E21b9/18 [58] Field of Search........ 299/86, 92; 175/335, 354, 175/332 [56] References Cited UNITED STATES PATENTS Krekeler 299/92 Aug. 20, 1974 i tgg pll 3/l970 Morrow..... 299/86 3,650,565 3/1972 Kniff 299/86 3,720,273 3/1973 McKenry et al. 175/335 Primary Examiner-Ernest R. Purser Attorney, Agent, or Firm-Melvin A. Crosby [5 7] ABSTRACT An excavating tool and a bit for use therewith in which the bit is of small dimensions and is mounted in a block in which the bit is rotatable and which block is configured in such a manner that it can be welded to various types of holders so that a plurality of blocks and bits mounted on a holder make an excavating tool of selected style and size.

5 Claims, 8 Drawing Figures PAIENEUmczomm SIEEI 10$ 3 EXCAVATING TOOL AND A BIT FOR USE THEREWITH The present invention relates to excavating tools and to bits to be used therewith and is particularly concerned with excavating tools made up from small bits and support blocks therefor with the blocks mounted on a support member.

Excavating tools and bits therefor are known. Further, bits of the pick type in which the bit is symmetrical by a longitudinal axis and has a sharp point on the leading end and is rotatably supported in a block are known. Heretofore, however, the bits and blocks have been relatively large and the size limitations thereby imposed on the excavating tool has precluded the manufacture of excavating tools for boring small diameter holes and for taking cores and the like.

The present invention is particularly concerned with excavating tools utilizing support blocks and pick-type bits rotatable therein in which the bits are relatively small and wherein the blocks are especially configured to facilitate the mounting thereof on a supporting member forming a part of the excavatingtool.

Another object of the invention is the provision of a pick-type bit of the nature referred to so configured as to permit the mounting of a massive wear resistant element in the working end thereof.

These and other objects and advantages of the present invention will become more apparent upon reference to the following detailed specification taken in connection with the accompanying drawings in which:

FIG. I is a side view of an auger or boring tool constructed according to the present invention.

FIG. 2 is an end view of the tool of FIG. 1.

FIG. 3 is an end view of a tool similar to what is shown in FIGS. 1 and 2 but wherein the tool comprises swingable wing cutters at the outside.

FIG. 4 is an end view of a small diameter auger according to the present invention.

FIG. 5 is an end view of a core barrel utilizing bits according to the present invention.

FIG. 6 is a side view partly in section showing one type of bit and block according to the present inventron.

FIG. 7 is an end view looking in from the left side of FIG. 6.

FIG. 8 is a view partly in section showing another type of pick-type bit according to the present invention.

BRIEF SUMMARY OF THE INVENTION According to the present invention, an excavating tool is constructed utilizing a support member which may be in the form of a back plate or ring and one one side of which is mounted, preferably, by welding, a plurality of blocks having bores therein. Pick-type bits are provided having cylindrical shanks rotatably receivable in the bores with the bits having pointed leading ends preferably provided with hard wear resistant inserts formed of, for example, cemented tungsten carbide.

The bits are held in the blocks against any substantial amount of axial movement therein while being permitted to rotate in the blocks. The picks, when presented to a formation to be reduced, are driven against the formation and will rotate in the respective blocks and will,

thus, wear off evenly and remain sharp and pointed throughout the life of the respective pick.

In one form of the invention, each pick has a massive pointed element formed of cemented tungsten carbide, or a like hard wear resistant material, mounted on the tip end thereof and which element has extremely long life and pronounced formation reducing capabilities. The support block for each pick is especially configured to facilitate mounting of the block on the support member in various angularly related positions so that the pick-type bits supported by a group of blocks on a support member can be so arranged that the point ends thereof are distributed relative to the formation to be reduced and are, therefore, efficient in reducing the formation.

Due to the small size of the pick-type bits and the support blocks therefor, small diameter auger tools can be made as well as core barrels, both of which are outside the scope of the conventional larger type pick-type 'bit and support block.

DETAILED DESCRIPTION OF THE INVENTION Referring to the drawings somewhat more in detail, in FIGS. 1 and 2, there is shown an auger consisting of a support plate or backing plate 10 from one side of which extends a drive shank 12 which may, for example, be hexagonal. Drive shank 12- is adapted for engagement by a driver which rotates plate 10 on the axis thereof while pressing the plate 10 in a direction away from the side from which driver 12 projects.

Plate 10 in the center thereof has fixed thereto a spacer or chuck 14 to the outer end of which is attached a pilot bit 16 which may consist of a body of steel with a transversely extending blade 18 fixed therein and which blade may advantageously consist of cemented tungsten carbide or a like hard wear resistant material.

According to the present invention, there is mounted on the plate 10 in circumferentially spaced relation on the same side as the pilot cutter, a plurality of support blocks 20 and in each of which there is rotatably mounted a pick-type bit 22 which at its outer free end is provided with a hard wear resistant insert 24 and which may, for example, consist of cemented tungsten carbide or the like.

Each pick-type bit has a shank 26 extending through an axial bore in the respective block 20 and on that portion of shank 26 which protrudes from the back of the block there is provided an annular groove into which a snap ring 28, either of metal or plastic, is mounted and which snap ring 28 prevents the bit from coming out of the block but does not in any way inhibit the pick from rotation in the block. The ring 28 can also be in the form of a rubber-like O-ring.

As will be seen in FIG. 2, the bits are so distributed as to cover a substantial radial range relative to the axis of the auger so that the formation to which the auger is presented is adequately reduced over the entire diameter of the auger.

It will be appreciated, upon reference to FIG. 2, that there is a bit 22a having its point radially innermost, and a bit 22b having its point disposed radially outwardly from the point of bit 22a and two bits 220 having their points radially outermost and both running on about the same circle and forming gauge cutters. The auger according to FIGS. 1 and 2 might, for example, be arranged to out about a 4 inch diameter hole.

FIG. 3 shows an arrangement for cutting a somewhat larger hole, and in this view a back plate 30 is provided from which a pilot cutter 32 protrudes in the axial direction on one side. On the same side of back plate 30, there is mounted in radially and circumferentially distributed relation a plurality of blocks 34 each having therein a respective pick-type bit 36.

Further, in at least two circumferentially distributed positions, plate 30 carries a U-shaped wing cutter support 37, each of which has mounted thereon a further block 38 with a respective pick 40 therein. The auger shown in FIG. 3 is adapted for rotation in the direction of arrow 42 during a working operation, and this will cause the wing cutters referred to to swing to a radially outermost position and determine the gauge of the bore being formed.

When the auger is rotated in the reverse direction, however, the wing cutters swing inwardly, as shown in dot-dash outline at the bottom of FIG. 3, and this provides ample clearance to permit the auger to be retracted from a bore, or to be introduced into a bore from which it has been withdrawn for the replacement of tools. When the wing cutters in FIG. 3 are swung to their radially outer positions, a firm bearing of the wing cutters on plate 30 occurs in the regions indicated at 44 so that the wing cutters are solidly supported during cutting operations.

FIG. 4 shows an auger for a small hole, for example, about 3 to 3 /2 inches. In FIG. 4, there is a base plate member 50 and mounted thereon in circumferentially distributed relation are blocks 52, each of which rotatably supports a respective picktype bit 54. In FIG. 4, the point ends of the pick-type bits are distributed radially so that each works in a respective radial zone of the bore being formed. Only one bit in the modification of FIG. 4 operates as a gauge cutter as opposed to the two bits which serve as gauge cutters in each of the modifications of FIGS. 2 and 3.

The small size of the picks and blocks enable the bit and block of the present invention to be utilized for forming core barrels. For example, in FIG. 5, a ring 60 is provided and fixed thereto in circumferentially spaced relation are blocks 62 each having a respective pick-type bit 64 mounted therein. The axes of the picktype bits are inclined with respect to the central axis of ring 60 so that the desired radial range is covered. In FIG. 5, the core taken is that region disposed radially inwardly from the two innermost pick-type bits.

FIGS. 6 and 7 show more in detail a typical block and pick-type bit of the nature illustrated in any of the modifications previously described. In FIGS. 6 and 7, the block is indicated at 70 and will be seen to have a central axial bore 72 in which the shank 74 of the respective bit 76 is rotatably mounted. The shank protrudes from the back of the block and has a snap ring 78 mounted in a groove provided in the shank at that region.

As opposed to the larger type blocks employed with pick-type bits, the block 70 in FIGS. 6 and 7 has a flat front face 80 and the pick-type bit 76 has a shoulder 82 that engages face 80 to support the working thrusts imposed on the bit. The shoulder 82 is formed by an enlarged forward end 84 formed at the front end of shank 74 and integral therewith. Enlarged forward end 84 has a bore 86 extending therein from the front end and bore 86 receives the shank 88 of a massive hard wear resistant insert 90 which, as mentioned, may be formed of cemented tungsten carbide or the like. The outwardly protruding end of insert is conically formed and tapers into a point at 92.

The block 70 has a dependent portion 94 which on the rear side at 96 inclines upwardly at an angle of about 45. As will be seen in FIG. 7, the sides of the dependent portion 94 as at 98 are also inclined upwardly and outwardly at angles of about 45. The respective angles can be varied, but the provision of the inclination on the dependent portion 94 of the block is of importance because it facilitates positioning the blocks on the various support members provided therefor and the fixing of the blocks to the support members as by weldmg.

FIG. 8 illustrates a pick-type bit similar to that of FIGS. 6 and 7 except that the bit 100 in FIG. 8 has a forward portion 102 axially longer than the forward portion 84 of the bit of FIGS. 6 and 7. The forward portion 102 of the bit of FIG. 8 has a bore 104 and a cylindrical insert 106 of cemented tungsten carbide or the like is mounted therein. This insert is also pointed on the forward end.

The inserts in all cases are advantageously brazed in position, but if suitable machining and manufacturing tolerances are observed, the inserts can also be mounted in the bores therefor with a press fit. Brazing is preferred because if the bodies of the bits wear away in use and expose the sides of the inserts that are normally embedded in the body, the inserts will be held in place by the brazing material and will not readily be knocked out of the body of the bit.

The bits can be used for drilling vertical holes as well as horizontal holes.

Modifications may be made within the scope of the appended claims.

What is claimed is:

1. In a mining tool; a bit having a bit body with a cylindrical shank adapted to be rotatably received in a bore in a support member, a substantially cylindrical head portion larger in diameter than said shank integrally connected to the forward end of the shank and coaxial therewith, an annular shoulder at the juncture of said shank and head portion and facing toward the shank end of the bit, said head portion being substantially shorter in the axial direction than said shank, said head portion having a minor part of the axial length thereof at the forward end tapering inwardly, a cylindrical recess coaxial with said head portion extending axially into said forward end of the head portion and having an axial length greater than half the axial length of the head portion and a diameter substantially greater than half the diameter of said shank, and a massive insert of hard wear resistant material having a shank portion fixed in said recess and a working portion integral with the shank portion at the forward end thereof and protruding forwardly from the forward end of said head portion of the bit body, said working portion being substantially larger in diameter than said shank portion of the insert and symmetric about the axis of the bit body and tapering inwardly in the forward direction to a pointed end, said insert at the juncture of said shank portion and working portion thereof having an annular flange region facing the forward end of the head portion of the bit body and in abutting engagement therewith, the working portion of said insert being substantially as long in the axial direction as said head portion of the bit body, said shank of said bit body having annular groove means formed therein to receive a keeper element for retaining the bit in assembled relation with a support member.

2. A mining tool according to claim 1 in which each of said shoulder and flange region is disposed in a plane perpendicular to the axis of the bit.

3. A mining tool according to claim 1 in which said working portion has a larger diameter cylindrical first region at the rearward end adjacent the forward end of the head portion of the bit body, a second intermediate region tapering inwardly in the forward direction at a first angle, and a third region at the forward end tapering inwardly in the forward direction at a second angle greater than said first angle, said third region terminating at the forward end in said pointed end.

4. A mining tool according to claim 1 in which said annular shoulder is disposed in a plane perpendicular to the axis of the bit body, and a support member in the form of a block having a bore for receiving the shank of the bit and a front end disposed in a plane perpendicular to the axis of the bore for engagement with said shoulder.

5. A mining tool according to claim 4 which includes a ring rotatable on a central axis, a plurality of said blocks mounted on one axial side of said ring in circumferentially spaced relation and all having the axes of the bores therein inclined in one and the same circumferential direction of said ring, the axes of said bores being inclined at different angles to the axis of rotation of said ring when the ring is viewed in the axial direction to dispose the point ends of the bits in the blocks in distributed relation over a radial range which extends from radially inside the ring to radially outside the ring whereby the bits in said blocks will take a kerf radially wider than said ring-whereby said tool is adapted for taking a core.

Claims (5)

1. In a mining tool; a bit having a bit body with a cylindrical shank adapted to be rotatably received in a bore in a support member, a substantially cylindrical head portion larger in diameter than said shank integrally connected to the forward end of the shank and coaxial therewith, an annular shoulder at the juncture of said shank and head portion and facing toward the shank end of the bit, said head portion being substantially shorter in the axial direction than said shank, said head portion having a minor part of the axial length thereof at the forward end tapering inwardly, a cylindrical recess coaxial with said head portion extending axially into said forward end of the head portion and having an axial length greater than half the axial length of the head portion and a diameter substantially greater than half the diameter of said shank, and a massive insert of hard wear resistant material having a shank portion fixed in said recess and a working portion integral with the shank portion at the forward end thereof and protruding forwardly from the forward end of said head portion of the bit body, said working portion being substantially larger in diameter than said shank portion of the insert and symmetric about the axis of the bit body and tapering inwardly in the forward direction to a pointed end, said insert at the juncture of said shank portion and working portion thereof having an annular flange region facing the forward end of the head portion of the bit body and in abutting engagement therewith, the working portion of said insert being substantially as long in the axial direction as said head portion of the bit body, said shank of said bit body having annular groove means formed therein to receive a keeper element for retaining the bit in assembled relation with a support member.
2. A mining tool according to claim 1 in which each of said shoulder and flange region is disposed in a plane perpendicular to the axis of the bit.
3. A mining tool according to claim 1 in which said working portion has a larger diameter cylindrical first region at the rearward end adjacent the forward end of the head portion of the bit body, a second intermediate region tapering inwardly in the forward direction at a first angle, and a third region at the forward end tapering inwardly in the forward direction at a second angle greater than said first angle, said third region terminating at the forward end in said pointed end.
4. A mining tool according to claim 1 in which said annular shoulder is disposed in a plane perpendicular to the axis of the bit body, and a support member in the form of a block having a bore for receiving the shank of the bit and a front end disposed in a plane perpendicular to the axis of the bore for engagement with said shoulder.
5. A mining tool according to claim 4 which includes a ring rotatable on a central axis, a plurality of said blocks mounted on one axial side of said ring in circumferentially spaced relation and all having the axes of the bores therein inclined in one and the same circumferential direction of said ring, the axes of said bores being inclined at different angles to the axis of rotation of said ring when the ring is viewed in the axial direction to dispose the point ends of the bits in the blocks in distributed relation over a radial range which extends from radiaLly inside the ring to radially outside the ring whereby the bits in said blocks will take a kerf radially wider than said ring whereby said tool is adapted for taking a core.
US33386973 1973-02-20 1973-02-20 Excavating tool and a bit for use therewith Expired - Lifetime US3830321A (en)

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US33386973 US3830321A (en) 1973-02-20 1973-02-20 Excavating tool and a bit for use therewith

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US33386973 US3830321A (en) 1973-02-20 1973-02-20 Excavating tool and a bit for use therewith
CA192,090A CA1003864A (en) 1973-02-20 1974-02-08 Excavating tool and a bit for use therewith
GB642074A GB1465185A (en) 1973-02-20 1974-02-12 Mining tools
DE19742407746 DE2407746C3 (en) 1973-02-20 1974-02-18
FR7405514A FR2218468B1 (en) 1973-02-20 1974-02-19
AU65813/74A AU480802B2 (en) 1973-02-20 1974-02-20 Mining tool

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US (1) US3830321A (en)
CA (1) CA1003864A (en)
DE (1) DE2407746C3 (en)
FR (1) FR2218468B1 (en)
GB (1) GB1465185A (en)

Cited By (97)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4547020A (en) * 1983-05-09 1985-10-15 Gte Products Corporation Rotatable cutting bit
US4561698A (en) * 1984-06-21 1985-12-31 Beebe Donald E Wear protector for tooth brackets on roadway surface cutting machines
EP0237359A2 (en) * 1986-03-13 1987-09-16 Smith International, Inc. Rotary drag bits
US4751972A (en) * 1986-03-13 1988-06-21 Smith International, Inc. Revolving cutters for rock bits
US4844550A (en) * 1987-07-21 1989-07-04 Beebe Donald E Wear protector for tooth brackets on roadway surface cutting machines
US4865392A (en) * 1985-07-18 1989-09-12 Gte Products Corporation Rotatable cutting bit
US4917196A (en) * 1989-08-15 1990-04-17 Kennametal Inc. Excavating tooth for an earth auger
US4938538A (en) * 1983-03-23 1990-07-03 Santrade Limited Excavating tool cutting insert
US5067775A (en) * 1988-04-21 1991-11-26 Kennametal Inc. Retainer for rotatable bits
US5143163A (en) * 1991-08-29 1992-09-01 Kennametal Inc. Digging tooth
US5161859A (en) * 1983-03-23 1992-11-10 Santrade Limited Excavating tool cutting insert
US5261499A (en) * 1992-07-15 1993-11-16 Kennametal Inc. Two-piece rotatable cutting bit
US5497843A (en) * 1995-03-24 1996-03-12 Central Mine Equipment Hollow auger head assembly
US5720528A (en) * 1996-12-17 1998-02-24 Kennametal Inc. Rotatable cutting tool-holder assembly
EP0864723A1 (en) * 1997-03-11 1998-09-16 Tone Geo Tech Co. Ltd. Boring bit and boring casing
WO2000034626A1 (en) * 1998-12-08 2000-06-15 Genesis Mining Technologies Limited Cutting arrangement
US6354771B1 (en) 1998-12-12 2002-03-12 Boart Longyear Gmbh & Co. Kg Cutting or breaking tool as well as cutting insert for the latter
US6574527B1 (en) 2000-10-05 2003-06-03 Kennametal Inc. Method of selecting a cutting system
USRE38151E1 (en) 1985-07-18 2003-06-24 Kennametal Inc. Rotatable cutting bit
US20080036269A1 (en) * 2006-08-11 2008-02-14 Hall David R Hollow Pick Shank
US20080035386A1 (en) * 2006-08-11 2008-02-14 Hall David R Pick Assembly
US20080035381A1 (en) * 2006-08-11 2008-02-14 Hall David R Lubricating drum
US20080035383A1 (en) * 2006-08-11 2008-02-14 Hall David R Non-rotating Pick with a Pressed in Carbide Segment
US20080036281A1 (en) * 2006-08-11 2008-02-14 Hall David R Hollow Pick Shank
US20080067859A1 (en) * 2006-08-11 2008-03-20 Hall David R Shank Assembly
US20080088172A1 (en) * 2006-08-11 2008-04-17 Hall David R Holder Assembly
US20080115977A1 (en) * 2006-08-11 2008-05-22 Hall David R Impact Tool
US20080129104A1 (en) * 2006-08-11 2008-06-05 Hall David R Impact Tool
US7390066B2 (en) 2006-08-11 2008-06-24 Hall David R Method for providing a degradation drum
US7396086B1 (en) * 2007-03-15 2008-07-08 Hall David R Press-fit pick
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
US20080284235A1 (en) * 2007-05-15 2008-11-20 Hall David R Spring Loaded Pick
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US20090000828A1 (en) * 2006-08-11 2009-01-01 Hall David R Roof Bolt Bit
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US20090174252A1 (en) * 2008-01-08 2009-07-09 Esco Corporation Tip for an earth working roll
US20090200855A1 (en) * 2006-08-11 2009-08-13 Hall David R Manually Rotatable Tool
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US7661765B2 (en) 2006-08-11 2010-02-16 Hall David R Braze thickness control
US20100054875A1 (en) * 2006-08-11 2010-03-04 Hall David R Test Fixture that Positions a Cutting Element at a Positive Rake Angle
US20100071964A1 (en) * 2006-10-26 2010-03-25 Hall David R Thick Pointed Superhard Material
US7712693B2 (en) 2006-08-11 2010-05-11 Hall David R Degradation insert with overhang
US7740414B2 (en) 2005-03-01 2010-06-22 Hall David R Milling apparatus for a paved surface
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
US20100264721A1 (en) * 2009-04-16 2010-10-21 Hall David R Seal with Rigid Element for Degradation Assembly
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
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US20100326740A1 (en) * 2009-06-26 2010-12-30 Hall David R Bonded Assembly Having Low Residual Stress
US7871133B2 (en) 2006-08-11 2011-01-18 Schlumberger Technology Corporation Locking fixture
US20110013984A1 (en) * 2006-12-01 2011-01-20 Hall David R End of a Moldboard Positioned Proximate a Milling Drum
US20110175430A1 (en) * 2010-01-20 2011-07-21 Ernst Heiderich Pick tool and method for making same
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US20120121846A1 (en) * 2008-12-22 2012-05-17 Cutting & Wear Resistant Developments Limited Wear Piece Element and Method of Construction
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
US8250786B2 (en) 2010-06-30 2012-08-28 Hall David R Measuring mechanism in a bore hole of a pointed cutting element
US8262168B2 (en) 2010-09-22 2012-09-11 Hall David R Multiple milling drums secured to the underside of a single milling machine
US8292372B2 (en) 2007-12-21 2012-10-23 Hall David R Retention for holder shank
US8403595B2 (en) 2006-12-01 2013-03-26 David R. Hall Plurality of liquid jet nozzles and a blower mechanism that are directed into a milling chamber
US8414085B2 (en) 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US8449039B2 (en) 2010-08-16 2013-05-28 David R. Hall Pick assembly with integrated piston
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US8485756B2 (en) 2006-12-01 2013-07-16 David R. Hall Heated liquid nozzles incorporated into a moldboard
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
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
US20130341999A1 (en) * 2006-08-11 2013-12-26 David R. Hall Attack Tool with an Interruption
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
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
US20140368023A1 (en) * 2007-03-15 2014-12-18 David R. Hall Attack Tool with an Interruption
US20150035342A1 (en) * 2012-01-24 2015-02-05 Element Six Abrasives S.A. Pick tool and assembly comprising same
US20150060149A1 (en) * 2013-09-04 2015-03-05 Shear Bits, Ltd. Drill bit having shear and pick-type cutters
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
US20160084010A1 (en) * 2014-09-23 2016-03-24 Shear Bits, Ltd Gouging cutter structure and drill bit made therewith
CN105735985A (en) * 2016-01-26 2016-07-06 山东天工岩土工程设备有限公司 Mining high-abrasion-resistant combination toothholder
US9662043B1 (en) * 2010-04-01 2017-05-30 Dartmouth-Hitchcock Clinic Gauge for determining nostril deformity and method for using the same
US9683415B2 (en) 2008-12-22 2017-06-20 Cutting & Wear Resistant Developments Limited Hard-faced surface and a wear piece element
JP2017193933A (en) * 2016-04-18 2017-10-26 敏司 斉藤 Core drill for improvement and reinforcement work for railroad ground, slope and retaining wall
US9909417B2 (en) 2014-07-24 2018-03-06 Novatek Ip, Llc Angled degradation pick
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT341978B (en) * 1976-04-14 1978-03-10 Voest Ag Rundmeissel
US5735360A (en) * 1996-11-12 1998-04-07 Engstrom; Robert W. Mining bit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3342532A (en) * 1965-03-15 1967-09-19 Cincinnati Mine Machinery Co Cutting tool comprising holder freely rotatable in socket with bit frictionally attached
US3498677A (en) * 1968-10-30 1970-03-03 Bowdil Co Cutting apparatus
US3650565A (en) * 1970-05-04 1972-03-21 Kennametal Inc Pick type mining bit and support block therefor
US3720273A (en) * 1971-03-03 1973-03-13 Kennametal Inc Mining tool

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1114156A (en) * 1964-09-01 1968-05-15 Coal Industry Patents Ltd Improvements in or relating to cutter picks
GB1241250A (en) * 1969-02-03 1971-08-04 Kennametal Inc Rotary boring tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3342532A (en) * 1965-03-15 1967-09-19 Cincinnati Mine Machinery Co Cutting tool comprising holder freely rotatable in socket with bit frictionally attached
US3498677A (en) * 1968-10-30 1970-03-03 Bowdil Co Cutting apparatus
US3650565A (en) * 1970-05-04 1972-03-21 Kennametal Inc Pick type mining bit and support block therefor
US3720273A (en) * 1971-03-03 1973-03-13 Kennametal Inc Mining tool

Cited By (162)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5161859A (en) * 1983-03-23 1992-11-10 Santrade Limited Excavating tool cutting insert
US4938538A (en) * 1983-03-23 1990-07-03 Santrade Limited Excavating tool cutting insert
US4547020A (en) * 1983-05-09 1985-10-15 Gte Products Corporation Rotatable cutting bit
US4561698A (en) * 1984-06-21 1985-12-31 Beebe Donald E Wear protector for tooth brackets on roadway surface cutting machines
US4865392A (en) * 1985-07-18 1989-09-12 Gte Products Corporation Rotatable cutting bit
USRE38151E1 (en) 1985-07-18 2003-06-24 Kennametal Inc. Rotatable cutting bit
EP0237359A2 (en) * 1986-03-13 1987-09-16 Smith International, Inc. Rotary drag bits
EP0237359A3 (en) * 1986-03-13 1988-11-23 Smith International, Inc. Rotary drag bits
US4751972A (en) * 1986-03-13 1988-06-21 Smith International, Inc. Revolving cutters for rock bits
US4844550A (en) * 1987-07-21 1989-07-04 Beebe Donald E Wear protector for tooth brackets on roadway surface cutting machines
US5067775A (en) * 1988-04-21 1991-11-26 Kennametal Inc. Retainer for rotatable bits
US4917196A (en) * 1989-08-15 1990-04-17 Kennametal Inc. Excavating tooth for an earth auger
WO1991002882A1 (en) * 1989-08-15 1991-03-07 Kennametal Inc. An excavating tooth for an earth auger
US5143163A (en) * 1991-08-29 1992-09-01 Kennametal Inc. Digging tooth
US5261499A (en) * 1992-07-15 1993-11-16 Kennametal Inc. Two-piece rotatable cutting bit
US5497843A (en) * 1995-03-24 1996-03-12 Central Mine Equipment Hollow auger head assembly
US5720528A (en) * 1996-12-17 1998-02-24 Kennametal Inc. Rotatable cutting tool-holder assembly
EP0864723A1 (en) * 1997-03-11 1998-09-16 Tone Geo Tech Co. Ltd. Boring bit and boring casing
GB2369137B (en) * 1998-12-08 2004-05-26 Genesis Mining Technologies Cutting arrangement
GB2369137A (en) * 1998-12-08 2002-05-22 Genesis Mining Technologies Cutting arrangement
AU759672B2 (en) * 1998-12-08 2003-04-17 Genesis Mining Technologies (Pty) Limited Cutting arrangement
US6712431B1 (en) 1998-12-08 2004-03-30 Genesis Mining Technologies (Pty) Limited Cutting arrangement
WO2000034626A1 (en) * 1998-12-08 2000-06-15 Genesis Mining Technologies Limited Cutting arrangement
US6354771B1 (en) 1998-12-12 2002-03-12 Boart Longyear Gmbh & Co. Kg Cutting or breaking tool as well as cutting insert for the latter
US6574527B1 (en) 2000-10-05 2003-06-03 Kennametal Inc. Method of selecting a cutting system
US7740414B2 (en) 2005-03-01 2010-06-22 Hall David R Milling apparatus for a paved surface
US7469971B2 (en) 2006-08-11 2008-12-30 Hall David R Lubricated pick
US20080035381A1 (en) * 2006-08-11 2008-02-14 Hall David R Lubricating drum
US20080035383A1 (en) * 2006-08-11 2008-02-14 Hall David R Non-rotating Pick with a Pressed in Carbide Segment
US20080036281A1 (en) * 2006-08-11 2008-02-14 Hall David R Hollow Pick Shank
US20080067859A1 (en) * 2006-08-11 2008-03-20 Hall David R Shank Assembly
US20080088172A1 (en) * 2006-08-11 2008-04-17 Hall David R Holder Assembly
US20080115977A1 (en) * 2006-08-11 2008-05-22 Hall David R Impact Tool
US20080129104A1 (en) * 2006-08-11 2008-06-05 Hall David R Impact 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
US9915102B2 (en) 2006-08-11 2018-03-13 Schlumberger Technology Corporation Pointed working ends on a bit
US9708856B2 (en) 2006-08-11 2017-07-18 Smith International, Inc. Downhole drill bit
US7413258B2 (en) 2006-08-11 2008-08-19 Hall David R Hollow pick shank
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
US9366089B2 (en) 2006-08-11 2016-06-14 Schlumberger Technology Corporation Cutting element attached to downhole fixed bladed bit at a positive rake angle
US20080264697A1 (en) * 2006-08-11 2008-10-30 Hall David R Retention for an Insert
US9051795B2 (en) 2006-08-11 2015-06-09 Schlumberger Technology Corporation Downhole drill bit
US8485609B2 (en) 2006-08-11 2013-07-16 Schlumberger Technology Corporation Impact tool
US20080309146A1 (en) * 2006-08-11 2008-12-18 Hall David R Degradation assembly shield
US20080309147A1 (en) * 2006-08-11 2008-12-18 Hall David R Shield of a Degradation Assembly
US20080309149A1 (en) * 2006-08-11 2008-12-18 Hall David R Braze Thickness Control
US20080035386A1 (en) * 2006-08-11 2008-02-14 Hall David R Pick Assembly
US20090000828A1 (en) * 2006-08-11 2009-01-01 Hall David R Roof Bolt Bit
US7475948B2 (en) 2006-08-11 2009-01-13 Hall David R Pick with a bearing
US8714285B2 (en) 2006-08-11 2014-05-06 Schlumberger Technology Corporation Method for drilling with a fixed bladed bit
US20090146489A1 (en) * 2006-08-11 2009-06-11 Hall David R Retention System
US8622155B2 (en) 2006-08-11 2014-01-07 Schlumberger Technology Corporation Pointed diamond working ends on a shear bit
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
US7600823B2 (en) 2006-08-11 2009-10-13 Hall David R Pick assembly
US20130341999A1 (en) * 2006-08-11 2013-12-26 David R. Hall Attack Tool with an Interruption
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
US7669674B2 (en) 2006-08-11 2010-03-02 Hall David R Degradation assembly
US20100054875A1 (en) * 2006-08-11 2010-03-04 Hall David R Test Fixture that Positions a Cutting Element at a Positive Rake Angle
US8590644B2 (en) 2006-08-11 2013-11-26 Schlumberger Technology Corporation Downhole drill bit
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
US20080036269A1 (en) * 2006-08-11 2008-02-14 Hall David R Hollow Pick Shank
US7744164B2 (en) 2006-08-11 2010-06-29 Schluimberger Technology Corporation Shield of a degradation assembly
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US8414085B2 (en) 2006-08-11 2013-04-09 Schlumberger Technology Corporation Shank assembly with a tensioned element
US8240404B2 (en) * 2006-08-11 2012-08-14 Hall David R Roof bolt bit
US8215420B2 (en) 2006-08-11 2012-07-10 Schlumberger Technology Corporation Thermally stable pointed diamond with increased impact resistance
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US8201892B2 (en) 2006-08-11 2012-06-19 Hall David R Holder assembly
US8029068B2 (en) 2006-08-11 2011-10-04 Schlumberger Technology Corporation Locking fixture for a degradation assembly
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US20100071964A1 (en) * 2006-10-26 2010-03-25 Hall David R 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
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
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US7976238B2 (en) * 2006-12-01 2011-07-12 Hall David R End of a moldboard positioned proximate a milling drum
US20110013984A1 (en) * 2006-12-01 2011-01-20 Hall David R End of a Moldboard Positioned Proximate a Milling Drum
US7976239B2 (en) 2006-12-01 2011-07-12 Hall David R End of a moldboard positioned proximate a milling drum
US8403595B2 (en) 2006-12-01 2013-03-26 David R. Hall Plurality of liquid jet nozzles and a blower mechanism that are directed into a milling chamber
US8365845B2 (en) 2007-02-12 2013-02-05 Hall David R High impact resistant tool
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US7926883B2 (en) 2007-05-15 2011-04-19 Schlumberger Technology Corporation Spring loaded pick
US8342611B2 (en) 2007-05-15 2013-01-01 Schlumberger Technology Corporation Spring loaded pick
US8038223B2 (en) 2007-09-07 2011-10-18 Schlumberger Technology Corporation Pick with carbide cap
US20090066149A1 (en) * 2007-09-07 2009-03-12 Hall David R Pick with Carbide Cap
US7832808B2 (en) 2007-10-30 2010-11-16 Hall David R Tool holder sleeve
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US8646848B2 (en) 2007-12-21 2014-02-11 David R. Hall Resilient connection between a pick shank and block
US20090174252A1 (en) * 2008-01-08 2009-07-09 Esco Corporation Tip for an earth working roll
US9222353B2 (en) 2008-01-08 2015-12-29 Esco Corporation Tip for an earth working roll
US8540037B2 (en) 2008-04-30 2013-09-24 Schlumberger Technology Corporation Layered polycrystalline diamond
US8931854B2 (en) 2008-04-30 2015-01-13 Schlumberger Technology Corporation Layered polycrystalline diamond
US7628233B1 (en) 2008-07-23 2009-12-08 Hall David R Carbide bolster
US20120121846A1 (en) * 2008-12-22 2012-05-17 Cutting & Wear Resistant Developments Limited Wear Piece Element and Method of Construction
US8752753B2 (en) * 2008-12-22 2014-06-17 Mark Russell Wear piece element and method of construction
US9683415B2 (en) 2008-12-22 2017-06-20 Cutting & Wear Resistant Developments Limited Hard-faced surface and a wear piece element
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
US20100275425A1 (en) * 2009-04-29 2010-11-04 Hall David R Drill Bit Cutter Pocket Restitution
US8701799B2 (en) 2009-04-29 2014-04-22 Schlumberger Technology Corporation Drill bit cutter pocket restitution
US20100326740A1 (en) * 2009-06-26 2010-12-30 Hall David R Bonded Assembly Having Low Residual Stress
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
US20110175430A1 (en) * 2010-01-20 2011-07-21 Ernst Heiderich Pick tool and method for making same
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US8250786B2 (en) 2010-06-30 2012-08-28 Hall David R Measuring mechanism in a bore hole of a pointed cutting element
US8261471B2 (en) 2010-06-30 2012-09-11 Hall David R Continuously adjusting resultant force in an excavating assembly
US8449039B2 (en) 2010-08-16 2013-05-28 David R. Hall Pick assembly with integrated piston
US8262168B2 (en) 2010-09-22 2012-09-11 Hall David R Multiple milling drums secured to the underside of a single milling machine
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
US9334731B2 (en) * 2012-01-24 2016-05-10 Element Six Abrasives S.A. Pick tool and assembly comprising same
US20150035342A1 (en) * 2012-01-24 2015-02-05 Element Six Abrasives S.A. Pick tool and assembly comprising same
US10107041B2 (en) * 2013-09-04 2018-10-23 Shear Bits, Ltd. Drill bit having shear cutters and gouging cutters
US20150060149A1 (en) * 2013-09-04 2015-03-05 Shear Bits, Ltd. Drill bit having shear and pick-type cutters
US9909417B2 (en) 2014-07-24 2018-03-06 Novatek Ip, Llc Angled degradation pick
US20160084010A1 (en) * 2014-09-23 2016-03-24 Shear Bits, Ltd Gouging cutter structure and drill bit made therewith
CN105735985A (en) * 2016-01-26 2016-07-06 山东天工岩土工程设备有限公司 Mining high-abrasion-resistant combination toothholder
JP2017193933A (en) * 2016-04-18 2017-10-26 敏司 斉藤 Core drill for improvement and reinforcement work for railroad ground, slope and retaining wall

Also Published As

Publication number Publication date
FR2218468B1 (en) 1977-03-04
CA1003864A (en) 1977-01-18
FR2218468A1 (en) 1974-09-13
DE2407746A1 (en) 1974-09-19
GB1465185A (en) 1977-02-23
DE2407746B2 (en) 1975-02-27
AU6581374A (en) 1975-08-21
DE2407746C3 (en) 1979-07-05
CA1003864A1 (en)

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