US3674101A - Drill construction - Google Patents

Drill construction Download PDF

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Publication number
US3674101A
US3674101A US26677A US3674101DA US3674101A US 3674101 A US3674101 A US 3674101A US 26677 A US26677 A US 26677A US 3674101D A US3674101D A US 3674101DA US 3674101 A US3674101 A US 3674101A
Authority
US
United States
Prior art keywords
drill
plate
head
notches
edge
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
US26677A
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English (en)
Inventor
Franz Chromy
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Application granted granted Critical
Publication of US3674101A publication Critical patent/US3674101A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • 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
    • E21B10/58—Chisel-type inserts

Definitions

  • an object of the invention to provide an improved drill construction which includes a cutting head having a hardened plate cutting member with a central projection which is less than the outside diameter of the drill.
  • FIG. la is a front elevational view of the drill indicated in FIG. 1;
  • FIG. 3 is a view similar to FIG. I of still another embodiment of the invention.
  • FIGS. 1 and la the invention embodied therein in FIGS. 1 and la comprises a drill I having a spirally extending drilling groove la defined therein and terminating in a head or end portion 4.
  • a drill 10' which includes a head portion 40' having a plate 20' secured thereto.
  • the plate 20' also includes a centering projection 30' which is defined between two notched areas 50 and 50' arranged on each side thereof.
  • the construction forms the drilling teeth 60a and 60a of the rectangular configuration indicated.
  • a spiral or twist drill comprising an axially elongated drill having a shank portion with a spiral groove defined in the exterior surface thereof and terminating in a head, the head of said drill having a groove therein extending diametrically across and inwardly from its end, a flat planar hard metal plate positioned within said groove and securely attached to said drill, said plate having a pointed edge extending axially from said head of said drill with the point thereof located on the axis of said drill, said pointed edge comprising two surfaces each sloping from the point in a diametrically opposite direction toward the circumferential periphery of said drill, each said surface of said edge extending rectilinearly from the point to the circumferential periphery of said drill and each said surface having a notch formed therein through said plate from one side to the other, each notch spaced between and from the point and the circumferential periphery of said drill, said notches being symmetrically arranged relative to the axis of said drill, and the portion
  • a drill according to claim 1, wherein the notches are rectangular.
  • a drill as set forth in claim 1, wherein said plate has a dimension in the diametrical direction of said drill which is slightly larger than the diameter of said drill so that said plate extends laterally from the head of said drill.
  • a drill as set forth in claim I wherein said surfaces of said edge of said plate being disposed at a bevel angle in the range of 45 to 60.
  • a drill as set forth in claim I, wherein said head of said drill being notched to form a continuation of said notch in said edge of said hard metal plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
US26677A 1969-04-28 1970-04-08 Drill construction Expired - Lifetime US3674101A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691921677 DE1921677B2 (de) 1969-04-28 1969-04-28 Drehschlag-wendelbohrer

Publications (1)

Publication Number Publication Date
US3674101A true US3674101A (en) 1972-07-04

Family

ID=5732675

Family Applications (1)

Application Number Title Priority Date Filing Date
US26677A Expired - Lifetime US3674101A (en) 1969-04-28 1970-04-08 Drill construction

Country Status (6)

Country Link
US (1) US3674101A (de)
AT (1) AT301424B (de)
CH (1) CH508461A (de)
DE (1) DE1921677B2 (de)
FR (1) FR2042136A5 (de)
GB (1) GB1270347A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143723A (en) * 1977-10-04 1979-03-13 Schmotzer Norman H Carbide tipped drill bit for boring holes in concrete and steel
US4503920A (en) * 1981-08-10 1985-03-12 Burke Clement Masonry bit
EP0322565A1 (de) * 1987-12-16 1989-07-05 Hawera Probst GmbH + Co. Gesteinsbohrer
US5288183A (en) * 1986-08-18 1994-02-22 Black & Decker Inc. Self-centering drill bit with pilot tip
US5442979A (en) * 1988-03-14 1995-08-22 Greenfield Industries, Inc. Twist drill
US5918105A (en) * 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6102634A (en) * 1995-07-29 2000-08-15 Black & Decker Inc. Masonry drill bit
EP1029622A2 (de) * 1999-02-15 2000-08-23 DreBo Werkzeugfabrik GmbH Steinbohrer
US6174111B1 (en) 1994-12-12 2001-01-16 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
EP1527836A2 (de) * 2003-11-03 2005-05-04 Illinois Tool Works Inc. Bohrhammerschneideinsatz
US8613579B2 (en) * 2007-10-11 2013-12-24 Hilti Aktiengesellschaft Self-drilling screw
US10507534B2 (en) 2016-03-17 2019-12-17 O-Tags, Inc. Systems, methods, and apparatus for reliably installing survey tags

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538191C2 (de) * 1985-10-26 1996-09-19 Hilti Ag Gesteinsbohrer
DE3540355C2 (de) * 1985-11-14 1996-01-11 Duss Maschf Bohrer zum drehschlagenden Bohren
GB8624430D0 (en) * 1986-10-11 1986-11-12 Waddell G Piloted drill bit
DE3825107C2 (de) * 1988-07-23 1996-07-11 Hilti Ag Gesteinsbohrer mit Schneidplatte
US5641028A (en) * 1995-08-10 1997-06-24 Black & Decker Inc. Drill bit with debris conveying flute
GB2318072A (en) * 1996-09-21 1998-04-15 Plansee Tizit Gmbh Masonry bit
US5967712A (en) * 1998-11-03 1999-10-19 Kennametal Inc. Cutting tool for machining bores in materials having spring-back
DE10024433A1 (de) * 2000-05-19 2001-11-29 Hawera Probst Gmbh Gesteinsbohrer
US7237986B2 (en) 2004-08-09 2007-07-03 Black & Decker Inc. High speed metal drill bit

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1007037A (en) * 1911-02-25 1911-10-24 Allan J Macdonald Drill.
DE584358C (de) * 1932-10-19 1933-09-18 Siemens Schuckertwerke Akt Ges Gesteinsdrehbohrer
US2230645A (en) * 1938-02-01 1941-02-04 Western Electric Co Drill
US2646701A (en) * 1949-12-27 1953-07-28 Peter A Letien Stepped edge cutting tool
US2673714A (en) * 1950-08-05 1954-03-30 John M Hargrave Rock or masonry drill
US2879036A (en) * 1956-06-25 1959-03-24 Philip T Wheeler Masonry drill
US3447616A (en) * 1966-12-29 1969-06-03 Zigmund E Granat Drills
US3460409A (en) * 1967-05-10 1969-08-12 Allied Machine & Eng Corp Chip breaker for spade drill

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1007037A (en) * 1911-02-25 1911-10-24 Allan J Macdonald Drill.
DE584358C (de) * 1932-10-19 1933-09-18 Siemens Schuckertwerke Akt Ges Gesteinsdrehbohrer
US2230645A (en) * 1938-02-01 1941-02-04 Western Electric Co Drill
US2646701A (en) * 1949-12-27 1953-07-28 Peter A Letien Stepped edge cutting tool
US2673714A (en) * 1950-08-05 1954-03-30 John M Hargrave Rock or masonry drill
US2879036A (en) * 1956-06-25 1959-03-24 Philip T Wheeler Masonry drill
US3447616A (en) * 1966-12-29 1969-06-03 Zigmund E Granat Drills
US3460409A (en) * 1967-05-10 1969-08-12 Allied Machine & Eng Corp Chip breaker for spade drill

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4143723A (en) * 1977-10-04 1979-03-13 Schmotzer Norman H Carbide tipped drill bit for boring holes in concrete and steel
US4503920A (en) * 1981-08-10 1985-03-12 Burke Clement Masonry bit
US5288183A (en) * 1986-08-18 1994-02-22 Black & Decker Inc. Self-centering drill bit with pilot tip
EP0322565A1 (de) * 1987-12-16 1989-07-05 Hawera Probst GmbH + Co. Gesteinsbohrer
US4903787A (en) * 1987-12-16 1990-02-27 Hawera Probst Gmbh & Co. Rock drill
US5442979A (en) * 1988-03-14 1995-08-22 Greenfield Industries, Inc. Twist drill
US5918105A (en) * 1994-12-12 1999-06-29 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6174111B1 (en) 1994-12-12 2001-01-16 Black & Decker Inc. Cutting tools for drilling concrete, aggregate, masonry or the like materials
US6102634A (en) * 1995-07-29 2000-08-15 Black & Decker Inc. Masonry drill bit
EP1029622A2 (de) * 1999-02-15 2000-08-23 DreBo Werkzeugfabrik GmbH Steinbohrer
EP1029622A3 (de) * 1999-02-15 2003-07-30 DreBo Werkzeugfabrik GmbH Steinbohrer
EP1527836A2 (de) * 2003-11-03 2005-05-04 Illinois Tool Works Inc. Bohrhammerschneideinsatz
EP1527836A3 (de) * 2003-11-03 2006-07-12 Illinois Tool Works Inc. Bohrhammerschneideinsatz
US8613579B2 (en) * 2007-10-11 2013-12-24 Hilti Aktiengesellschaft Self-drilling screw
US10507534B2 (en) 2016-03-17 2019-12-17 O-Tags, Inc. Systems, methods, and apparatus for reliably installing survey tags

Also Published As

Publication number Publication date
GB1270347A (en) 1972-04-12
DE1921677A1 (de) 1970-11-05
CH508461A (de) 1971-06-15
FR2042136A5 (de) 1971-02-05
DE1921677B2 (de) 1977-09-29
AT301424B (de) 1972-09-11

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