WO1984004353A1 - Rotatable cutting bit - Google Patents
Rotatable cutting bit Download PDFInfo
- Publication number
- WO1984004353A1 WO1984004353A1 PCT/US1984/000619 US8400619W WO8404353A1 WO 1984004353 A1 WO1984004353 A1 WO 1984004353A1 US 8400619 W US8400619 W US 8400619W WO 8404353 A1 WO8404353 A1 WO 8404353A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- section
- rotatable cutting
- cutting bit
- bit according
- base
- Prior art date
Links
- 238000005219 brazing Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
-
- 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
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
-
- 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
- E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
- E21C35/1837—Mining picks; Holders therefor with inserts or layers of wear-resisting material characterised by the shape
Definitions
- the present invention relates to a rotatable cutting bit of the type having a head portion and depending shank.
- Bits that are used in mining and for removing road surfaces are typically mounted in a machine having a power driven cutter wheel.
- the wheel has an array of cutter bits mounted on the rim which attack the material to be broken.
- a rotatable cutting bit comprising a head portion, a shank portion depending from said head portion along a longitudinal axis, said head portion having a socket at the foward end, a hard insert having coaxially aligned and integral sections, said sections comprising a base section, and an intermediate section contiguous said base and tip section, said base being fixedly mounted in said socket and having a first diameter, said tip section being conically shaped and having a maximum second diameter.
- the point attack bit of the present invention is especially useful for removing layers of asphaltic concrete from roadways. Asphaltic concrete is very abrasive and causes excessive steel body wear around the tip. Thus, small bullet, type carbide tips would tend to lose support from around the tip causing the tip to fall out.
- Tips presently used for this purpose are conically shaped from tip to base.
- the base has diameter of about five eighths of an inch. As the tip wears during use it becomes blunt and the machine speed is reduced.
- the present invention obviates the above discussed disadvantages by providing a small diameter tip which reduces blunting so that machine speed is maintained while being firmly held by the head of the bit during cutting.
- Figure 1 is a partially sectioned view of a bit mounted in block.
- Figure 2 is a side view of a tip; and
- Figure 3 is an end view of a tip.
- Figure 1 shows a rotatable bit 11 having a head portion . 13 and a depending shank portion 15.
- the head portion 13 and shank 15 are coaxially aligned with the head 13 having an enlarged section 17 which prevents the head 13 from being forced into the opening in the mounting block 19.
- the shank portion 15 which is a cylindrical configuration includes a sleeve 21 which is radially contracted when present in the opening so as to hold the bit 11 in the block 19.
- a hard insert 23 typically made of a carbide mate ⁇ rial is fixedly secured to the forward end of the head 13.
- the base section 25 of the insert 23 is positioned in the socket and brazed in such a manner that the braze flows over and around the base section 25.
- the insert 23 includes a plurality of sec ⁇ tions coaxially aligned with the head 13 and shank 15 of the bit 11.
- the sections include a base section 25, a tip section 27 and an intermediate section 29 contiguous to .the base 25 and tip section 27.
- the tip section 27 tapers outwardly at an included angle "c" of from about 83 degrees to about 93 degrees, preferably the angle, is about 88 degrees.
- the point portion of the tip may be rounded to promote even wear ⁇ ing.
- the tip 27 extends downwardly in an axial direction toward the base 25 a distance of from about 0.10 to about 0.15 inches.
- the maximum diameter of the tip 27 is from about 0.36 to about 0.44 inch, and most preferably about 0.4 inch.
- the intermediate section 29 extends downwardly from the juncture with the tip 27 or forwardly from the juncture with the base 25 along a longitudinal direction a distance of about 0.25 to about 0.31 inches.
- the intermediate section 29 which has a fusto-coni- cal shape tapers outwardly to the base section 25 at an included angle "d" of from about 17 to about 23 degrees.
- the taper is outwardly from the junction with the tip 27 to the junction with the base 25.
- the base section 25 preferably has a diameter of from about 0.6 to about 0.66 and most preferably about 0.63.
- the extension of the base 25 in the axial direc ⁇ tion or the height of the base is preferably from about 0.05 to about 0.11 and most preferably about 0.08.
- a fillet may be utilized to give a smooth transition form the base to the intermediate setion 29. .
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Knives (AREA)
Abstract
A rotatable cutting insert of the type having a shank (15) depending from a head portion (13) and having a hard insert (23) mounted therein, includes an improved insert having a conically shaped tip section (27), a base section (25) and an intermediate section (29) with the maximum diameter of the tip section smaller than the diameter of the base section.
Description
- t-
ROTATABLE CUTTING BIT
Field of Invention
The present invention relates to a rotatable cutting bit of the type having a head portion and depending shank.
Background of Invention
Bits that are used in mining and for removing road surfaces are typically mounted in a machine having a power driven cutter wheel. The wheel has an array of cutter bits mounted on the rim which attack the material to be broken.
It- is desirable to have the bits rotate in their sockets to permit wear on the bit to be distributed evenly so as to maintain sharpness.
Summary of Invention
In accordance with the present invention there is provided, a rotatable cutting bit comprising a head portion, a shank portion depending from said head portion along a longitudinal axis, said head portion having a socket at the foward end, a hard insert having coaxially aligned and integral sections, said sections comprising a base section, and an intermediate section contiguous said base and tip section, said base being fixedly mounted in said socket and having a first diameter, said tip section being conically shaped and having a maximum second diameter.
The point attack bit of the present invention is especially useful for removing layers of asphaltic concrete from roadways. Asphaltic concrete is very abrasive and causes excessive steel body wear around the tip. Thus, small bullet, type carbide tips would tend to lose support from around the tip causing the tip to fall out.
Tips presently used for this purpose are conically shaped from tip to base. The base has diameter of about five eighths of an inch. As the tip wears during use it becomes blunt and the machine speed is reduced. The present invention obviates the above discussed disadvantages by providing a small diameter tip which reduces blunting so that machine speed is maintained while being firmly held by the head of the bit during cutting.
DRAWINGS
Figure 1 is a partially sectioned view of a bit mounted in block. Figure 2 is a side view of a tip; and Figure 3 is an end view of a tip.
DETAILED DESCRIPTION
Referreing to the drawings. Figure 1 shows a rotatable bit 11 having a head portion .13 and a depending shank portion 15. The head portion 13 and shank 15 are coaxially aligned with the head 13 having an enlarged section 17 which prevents the head 13 from being forced into the opening in the mounting block 19.
The shank portion 15 which is a cylindrical configuration includes a sleeve 21 which is radially contracted when present in the opening so as to hold the bit 11 in the block 19.
A hard insert 23 typically made of a carbide mate¬ rial is fixedly secured to the forward end of the head 13. Preferably the base section 25 of the insert 23 is positioned in the socket and brazed in such a manner that the braze flows over and around the base section 25.
In accordance with the principals of the present invention, the insert 23 includes a plurality of sec¬ tions coaxially aligned with the head 13 and shank 15 of the bit 11. The sections include a base section 25, a tip section 27 and an intermediate section 29 contiguous to .the base 25 and tip section 27.
The tip section 27 tapers outwardly at an included angle "c" of from about 83 degrees to about 93 degrees, preferably the angle, is about 88 degrees. The point portion of the tip may be rounded to promote even wear¬ ing. Preferably the tip 27 extends downwardly in an axial direction toward the base 25 a distance of from about 0.10 to about 0.15 inches. The maximum diameter of the tip 27 is from about 0.36 to about 0.44 inch, and most preferably about 0.4 inch.
The intermediate section 29 extends downwardly from the juncture with the tip 27 or forwardly from the juncture with the base 25 along a longitudinal direction a distance of about 0.25 to about 0.31 inches. Prefer- ably the intermediate section 29 which has a fusto-coni- cal shape tapers outwardly to the base section 25 at an included angle "d" of from about 17 to about 23 degrees. The taper is outwardly from the junction with the tip 27 to the junction with the base 25. The base section 25 preferably has a diameter of from about 0.6 to about 0.66 and most preferably about 0.63. The extension of the base 25 in the axial direc¬ tion or the height of the base is preferably from about 0.05 to about 0.11 and most preferably about 0.08. As illustrated in the drawing, a fillet may be utilized to give a smooth transition form the base to the intermediate setion 29. .
Claims
1. A rotatable cutting bit comprising a head portion, a shank portion depending from said head portion along a longitudinal axis, said head portion having a socket at the forward end, a hard insert having coaxially aligned an integral sections, said sections comprising a base section, a tip section, and an intermediate section contiguous said base and tip section, said bas.e being fixedly mounted in said socket and having a first diameter, said tip section being conically shaped and having a maximum second diameter being less than said first diameter.
2. A rotatable cutting bit according to claim 1 wherein said intermediate section has a frusto-conical shape and tapers outwardly from the junction with the tip section to the junction with the base section.
3. A rotatable cutting bit according to claim 2 wherein substantially all of said intermediate section
, projects forwardly of the forward end of said head portion.
4. A rotatable cutting bit according to claim 3 wherein said tip section tapers outwardly at an included angle of from about 83 degrees to about 93 degrees.
5. A rotatable cutting bit according to claim 4 wherein said intermediate section extends forwardly along t.he longitudinal axis from the base section to the tip section a distance of from about 0.25 to about 0.31 inches.
6. A rotatable cutting bit according to claim 5 wherein the base section extends along the longitudinal axis a distance of from about 0.05 to about 0.11.
7. A rotatable cutting bit according to claim 6 wherein said first diameter is from about 0.6 to about " 0.66 inches.
8. A rotatable cutting bit according to claim 6 wherein said second diameter is from about 0.38 to about 0.44 inches.
9. A rotatable cutting bit according to claim 6 wherein said intermediate section tapers outwardly from said conical section to said base section at an included angle of from about 17 to about 23 degrees.
*> 10. A rotatable cutting bit according to claim 6 wherein said insert is fixedly held to said head portion by brazing, said braze flowing over and around said base section.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8484901899T DE3478941D1 (en) | 1983-04-29 | 1984-04-23 | Rotatable cutting bit |
DE198484901899T DE147419T1 (en) | 1983-04-29 | 1984-04-23 | ROTATING CUTTING TIP. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/489,990 US4497520A (en) | 1983-04-29 | 1983-04-29 | Rotatable cutting bit |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1984004353A1 true WO1984004353A1 (en) | 1984-11-08 |
Family
ID=23946137
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1984/000619 WO1984004353A1 (en) | 1983-04-29 | 1984-04-23 | Rotatable cutting bit |
Country Status (6)
Country | Link |
---|---|
US (1) | US4497520A (en) |
EP (1) | EP0147419B1 (en) |
JP (1) | JPS60501263A (en) |
CA (2) | CA1221820A (en) |
DE (2) | DE147419T1 (en) |
WO (1) | WO1984004353A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996013968A2 (en) * | 1994-10-28 | 1996-05-17 | I.N. Frantsevich Institute For Problems Of Materials Science | Cutting insert for a cutting tool |
Families Citing this family (60)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5161859A (en) * | 1983-03-23 | 1992-11-10 | Santrade Limited | Excavating tool cutting insert |
US4743069A (en) * | 1985-03-19 | 1988-05-10 | Gte Products Corporation | Rotatable cutting bit |
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 |
EP0259620A1 (en) * | 1986-09-09 | 1988-03-16 | Kennametal Inc. | Cutter bit having hard tip with middle section defined by concave surface of revolution |
US4886710A (en) * | 1987-04-16 | 1989-12-12 | Kennametal Inc. | Mining/construction tool bit having bit body fabricated from Mn-B steel alloy composition |
US5112411A (en) * | 1987-04-16 | 1992-05-12 | Kennametal Inc. | Process of making mining/construction tool bit body fabricated from MN/B steel alloy composition |
US5008073A (en) * | 1987-04-16 | 1991-04-16 | Kennametal Inc. | Mn-B steel alloy composition |
US4859543A (en) * | 1987-04-28 | 1989-08-22 | Kennametal Inc. | Earth working tool having a working element fabricated from cemented tungsten carbide compositions with enhanced properties |
US4765686A (en) * | 1987-10-01 | 1988-08-23 | Gte Valenite Corporation | Rotatable cutting bit for a mining machine |
US4911504A (en) | 1988-07-20 | 1990-03-27 | Kennametal Inc. | Cutter bit and tip |
US5141289A (en) * | 1988-07-20 | 1992-08-25 | Kennametal Inc. | Cemented carbide tip |
US4940288A (en) * | 1988-07-20 | 1990-07-10 | Kennametal Inc. | Earth engaging cutter bit |
US4941711A (en) * | 1988-07-20 | 1990-07-17 | Kennametal Inc. | Cemented carbide tip |
US4911503A (en) * | 1988-07-20 | 1990-03-27 | Kennametal Inc. | Earth engaging cutter bit |
US4893875A (en) * | 1988-12-16 | 1990-01-16 | Caterpillar Inc. | Ground engaging bit having a hardened tip |
US4981328A (en) * | 1989-08-22 | 1991-01-01 | Kennametal Inc. | Rotatable tool having a carbide insert with bumps |
US5219209A (en) * | 1992-06-11 | 1993-06-15 | Kennametal Inc. | Rotatable cutting bit insert |
US5417475A (en) * | 1992-08-19 | 1995-05-23 | Sandvik Ab | Tool comprised of a holder body and a hard insert and method of using same |
US5324098A (en) * | 1992-12-17 | 1994-06-28 | Kennametal Inc. | Cutting tool having hard tip with lobes |
US5837071A (en) * | 1993-11-03 | 1998-11-17 | Sandvik Ab | Diamond coated cutting tool insert and method of making same |
US5775781A (en) * | 1996-01-26 | 1998-07-07 | Randy R. Sawtelle | Pavement marking removal tool and method |
US5823632A (en) * | 1996-06-13 | 1998-10-20 | Burkett; Kenneth H. | Self-sharpening nosepiece with skirt for attack tools |
US6196636B1 (en) | 1999-03-22 | 2001-03-06 | Larry J. McSweeney | Cutting bit insert configured in a polygonal pyramid shape and having a ring mounted in surrounding relationship with the insert |
US6595305B1 (en) | 2000-02-15 | 2003-07-22 | Kennametal Inc. | Drill bit, hard member, and bit body |
US6375272B1 (en) | 2000-03-24 | 2002-04-23 | Kennametal Inc. | Rotatable cutting tool insert |
US6860344B2 (en) | 2001-06-25 | 2005-03-01 | Kennametal Inc. | Monolithic roof cutting bit insert |
US6851758B2 (en) * | 2002-12-20 | 2005-02-08 | Kennametal Inc. | Rotatable bit having a resilient retainer sleeve with clearance |
US8007051B2 (en) | 2006-08-11 | 2011-08-30 | Schlumberger Technology Corporation | Shank assembly |
US8033616B2 (en) | 2006-08-11 | 2011-10-11 | Schlumberger Technology Corporation | Braze thickness control |
US20090058174A1 (en) * | 2006-08-11 | 2009-03-05 | Hall David R | Attack Tool |
US8123302B2 (en) | 2006-08-11 | 2012-02-28 | Schlumberger Technology Corporation | Impact tool |
US9051795B2 (en) | 2006-08-11 | 2015-06-09 | Schlumberger Technology Corporation | Downhole drill bit |
US7997661B2 (en) | 2006-08-11 | 2011-08-16 | Schlumberger Technology Corporation | Tapered bore in a pick |
US8201892B2 (en) | 2006-08-11 | 2012-06-19 | Hall David R | Holder assembly |
US9145742B2 (en) | 2006-08-11 | 2015-09-29 | Schlumberger Technology Corporation | Pointed working ends on a drill bit |
US7669674B2 (en) * | 2006-08-11 | 2010-03-02 | Hall David R | Degradation assembly |
US8292372B2 (en) * | 2007-12-21 | 2012-10-23 | Hall David R | Retention for holder shank |
US8449040B2 (en) * | 2006-08-11 | 2013-05-28 | David R. Hall | Shank for an attack tool |
US8414085B2 (en) * | 2006-08-11 | 2013-04-09 | Schlumberger Technology Corporation | Shank assembly with a tensioned element |
US7871133B2 (en) | 2006-08-11 | 2011-01-18 | Schlumberger Technology Corporation | Locking fixture |
US8485609B2 (en) * | 2006-08-11 | 2013-07-16 | Schlumberger Technology Corporation | Impact tool |
US7458646B2 (en) * | 2006-10-06 | 2008-12-02 | Kennametal Inc. | Rotatable cutting tool and cutting tool body |
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 |
US7926883B2 (en) * | 2007-05-15 | 2011-04-19 | Schlumberger Technology Corporation | Spring loaded pick |
US7959234B2 (en) | 2008-03-15 | 2011-06-14 | Kennametal Inc. | Rotatable cutting tool with superhard cutting member |
US20100018776A1 (en) * | 2008-07-28 | 2010-01-28 | Keller Donald E | Cutting bit for mining and excavating tools |
US8523290B2 (en) * | 2009-04-10 | 2013-09-03 | Kennametal Inc. | Rotatable cutting tool-tool holder-base assembly |
US8523289B2 (en) * | 2009-04-10 | 2013-09-03 | Kennametal Inc. | Retention assembly for cutting bit |
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 |
US20110068616A1 (en) * | 2009-09-21 | 2011-03-24 | Kennametal Inc. | Rotatable cutting tool with hard cutting member |
US8449041B2 (en) * | 2010-10-27 | 2013-05-28 | Sandvik Intellectual Property Ab | Grading pick with extended fins |
AU2012201292A1 (en) | 2011-03-21 | 2012-10-11 | Kennametal Inc. | Cutting tool |
EP2811114A1 (en) * | 2013-06-06 | 2014-12-10 | Caterpillar Global Mining Europe GmbH | Tool support for cutting heads |
US9695687B2 (en) | 2015-05-20 | 2017-07-04 | Kennametal Inc. | Block with coolant delivery |
USD844684S1 (en) | 2017-02-22 | 2019-04-02 | American Carbide Tools Innovations, LLC | Rotatable cutting bit |
USD863386S1 (en) | 2018-06-06 | 2019-10-15 | Kennametal Inc. | Ribbed cutting insert |
US20200149397A1 (en) * | 2018-11-13 | 2020-05-14 | Randall Walter Ojanen | Point attack insert for rotatable cutting tool |
JP7323169B2 (en) * | 2019-09-02 | 2023-08-08 | アロイ工業株式会社 | Tip structure of casing bit and casing pipe |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT262916B (en) * | 1965-11-17 | 1968-07-10 | Eckart Cronjaeger | Carbide-tipped drill bit |
US3957307A (en) * | 1974-09-18 | 1976-05-18 | Olind Varda | Rough cutter mining tool |
US3997011A (en) * | 1975-05-27 | 1976-12-14 | Staroba Otto R | Button drill bit structure |
DE2846744A1 (en) * | 1978-10-27 | 1980-04-30 | Wallram Hartmetall Gmbh | Mine coal cutting pick cone fixing lug - has reverse cone and circular sections, and reducing collar on ledge |
SU751991A1 (en) * | 1978-02-21 | 1980-07-30 | За витель | Cutting tool to mining machines |
US4216832A (en) * | 1976-06-24 | 1980-08-12 | Kennametal Inc. | Furrowing tool |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1112446A (en) * | 1965-08-18 | 1968-05-08 | Tungsten Carbide Dev Ltd | Improvements in or relating to coal-cutter picks and the like with hard metal tips |
NL7703234A (en) * | 1977-03-25 | 1978-09-27 | Skf Ind Trading & Dev | METHOD FOR MANUFACTURING A DRILL CHUCK INCLUDING HARD WEAR-RESISTANT ELEMENTS, AND DRILL CHAPTER MADE ACCORDING TO THE METHOD |
SE450259C (en) * | 1983-03-23 | 1996-07-22 | Sandvik Ab | Tools for breaking or cutting solid materials such as asphalt |
-
1983
- 1983-04-29 US US06/489,990 patent/US4497520A/en not_active Expired - Lifetime
-
1984
- 1984-04-23 WO PCT/US1984/000619 patent/WO1984004353A1/en not_active Application Discontinuation
- 1984-04-23 DE DE198484901899T patent/DE147419T1/en active Pending
- 1984-04-23 JP JP59502062A patent/JPS60501263A/en active Granted
- 1984-04-23 DE DE8484901899T patent/DE3478941D1/en not_active Expired
- 1984-04-23 EP EP84901899A patent/EP0147419B1/en not_active Expired
- 1984-04-27 CA CA000453079A patent/CA1221820A/en not_active Expired
-
1989
- 1989-06-29 CA CA000604471A patent/CA1285266C/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT262916B (en) * | 1965-11-17 | 1968-07-10 | Eckart Cronjaeger | Carbide-tipped drill bit |
US3957307A (en) * | 1974-09-18 | 1976-05-18 | Olind Varda | Rough cutter mining tool |
US3997011A (en) * | 1975-05-27 | 1976-12-14 | Staroba Otto R | Button drill bit structure |
US4216832A (en) * | 1976-06-24 | 1980-08-12 | Kennametal Inc. | Furrowing tool |
SU751991A1 (en) * | 1978-02-21 | 1980-07-30 | За витель | Cutting tool to mining machines |
DE2846744A1 (en) * | 1978-10-27 | 1980-04-30 | Wallram Hartmetall Gmbh | Mine coal cutting pick cone fixing lug - has reverse cone and circular sections, and reducing collar on ledge |
Non-Patent Citations (1)
Title |
---|
See also references of EP0147419A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996013968A2 (en) * | 1994-10-28 | 1996-05-17 | I.N. Frantsevich Institute For Problems Of Materials Science | Cutting insert for a cutting tool |
WO1996013968A3 (en) * | 1994-10-28 | 1996-08-08 | I N Frantsevich Inst For Probl | Cutting insert for a cutting tool |
Also Published As
Publication number | Publication date |
---|---|
JPH0447760B2 (en) | 1992-08-04 |
DE3478941D1 (en) | 1989-08-17 |
EP0147419A4 (en) | 1985-09-16 |
CA1221820A (en) | 1987-05-19 |
JPS60501263A (en) | 1985-08-08 |
EP0147419B1 (en) | 1989-07-12 |
DE147419T1 (en) | 1985-10-10 |
EP0147419A1 (en) | 1985-07-10 |
US4497520A (en) | 1985-02-05 |
CA1285266C (en) | 1991-06-25 |
US4497520B1 (en) | 1989-01-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4497520A (en) | Rotatable cutting bit | |
US4765686A (en) | Rotatable cutting bit for a mining machine | |
US4725099A (en) | Rotatable cutting bit | |
AU640376B2 (en) | Rotatable cutting tool | |
US5484191A (en) | Insert for tungsten carbide tool | |
US4893875A (en) | Ground engaging bit having a hardened tip | |
US5324098A (en) | Cutting tool having hard tip with lobes | |
US6065908A (en) | Drill | |
CA1266651A (en) | Rock drill with cutting inserts | |
DE19821147C2 (en) | Attack cutting tools | |
US5049010A (en) | Metal cutting tool | |
US5000630A (en) | Bit for forming holes in composite materials | |
AU651095B2 (en) | Rotatable cutting tool | |
AU642075B2 (en) | Rotary drill bit insert | |
IE55642B1 (en) | Rock drill bit | |
US5092719A (en) | Auger bit | |
US4607712A (en) | Rock drill bit | |
US4159746A (en) | Bit of circular cross-section | |
JPH0830327B2 (en) | Rotating tool for ice / snow shoveling cutter | |
US4917196A (en) | Excavating tooth for an earth auger | |
DE10300756A1 (en) | Stumpfzerkleinerungsmeissel | |
US20070205652A1 (en) | Rotatable Cutting Tool | |
US5143163A (en) | Digging tooth | |
US5476149A (en) | Pilot bit | |
US4488608A (en) | Rotary stone-cutting head with hardened teeth inserts |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 1984901899 Country of ref document: EP |
|
AK | Designated states |
Designated state(s): JP |
|
AL | Designated countries for regional patents |
Designated state(s): BE CH DE FR GB NL SE |
|
WWP | Wipo information: published in national office |
Ref document number: 1984901899 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1984901899 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1984901899 Country of ref document: EP |