GB512830A - Improvements in percussion drills - Google Patents

Improvements in percussion drills

Info

Publication number
GB512830A
GB512830A GB778437A GB778437A GB512830A GB 512830 A GB512830 A GB 512830A GB 778437 A GB778437 A GB 778437A GB 778437 A GB778437 A GB 778437A GB 512830 A GB512830 A GB 512830A
Authority
GB
United Kingdom
Prior art keywords
flutes
drill
ribs
point
percussion
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
Application number
GB778437A
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.)
Rawlplug Co Ltd
Original Assignee
Rawlplug Co Ltd
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 Rawlplug Co Ltd filed Critical Rawlplug Co Ltd
Priority to GB778437A priority Critical patent/GB512830A/en
Publication of GB512830A publication Critical patent/GB512830A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D3/00—Hand chisels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/305—Twisted part of a chisel or percussive non-drilling tool bit

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Drilling Tools (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

512,830. Percussion drills. RAWLINGS, J. J., and RAWLPLUG CO., Ltd. March 17, 1938, No. 7784/37. [Class 124] In a manually or power operated rotary percussion drill a of the kind having two or more flutes b, grooves e are cut in the bottom parts of the flutes. The ribs d are therefore joined to the body of the drill by parts g of reduced crosssection. The flutes may extend helically of the drill, they may increase in depth towards the point h, and they may be so shaped that the sides c of the ribs d are flat or concave. The flutes may be of different depths so as to produce unequal ribs, with the point h disposed eccentrically of the drill, the latter then having a vibratory action.
GB778437A 1938-03-17 1938-03-17 Improvements in percussion drills Expired GB512830A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB778437A GB512830A (en) 1938-03-17 1938-03-17 Improvements in percussion drills

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB778437A GB512830A (en) 1938-03-17 1938-03-17 Improvements in percussion drills

Publications (1)

Publication Number Publication Date
GB512830A true GB512830A (en) 1939-09-27

Family

ID=9839649

Family Applications (1)

Application Number Title Priority Date Filing Date
GB778437A Expired GB512830A (en) 1938-03-17 1938-03-17 Improvements in percussion drills

Country Status (1)

Country Link
GB (1) GB512830A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685629A2 (en) * 1994-06-04 1995-12-06 HILTI Aktiengesellschaft Rock drill bit
EP3222390A1 (en) * 2016-03-23 2017-09-27 HILTI Aktiengesellschaft Chisel
EP3281748A1 (en) * 2016-08-08 2018-02-14 HILTI Aktiengesellschaft Chisel

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685629A2 (en) * 1994-06-04 1995-12-06 HILTI Aktiengesellschaft Rock drill bit
EP0685629A3 (en) * 1994-06-04 1996-12-18 Hilti Ag Rock drill bit.
EP3222390A1 (en) * 2016-03-23 2017-09-27 HILTI Aktiengesellschaft Chisel
WO2017162623A1 (en) * 2016-03-23 2017-09-28 Hilti Aktiengesellschaft Tool bit
US11213939B2 (en) 2016-03-23 2022-01-04 Hilti Aktiengesellschaft Chisel
EP3281748A1 (en) * 2016-08-08 2018-02-14 HILTI Aktiengesellschaft Chisel
WO2018029022A1 (en) * 2016-08-08 2018-02-15 Hilti Aktiengesellschaft Tool bit

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