GB823731A - Improvements in or relating to masonry drills - Google Patents

Improvements in or relating to masonry drills

Info

Publication number
GB823731A
GB823731A GB3468556A GB3468556A GB823731A GB 823731 A GB823731 A GB 823731A GB 3468556 A GB3468556 A GB 3468556A GB 3468556 A GB3468556 A GB 3468556A GB 823731 A GB823731 A GB 823731A
Authority
GB
United Kingdom
Prior art keywords
ribs
drills
shank
nov
tip
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
GB3468556A
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.)
ROBERT EDWARD MASON
Original Assignee
ROBERT EDWARD MASON
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 ROBERT EDWARD MASON filed Critical ROBERT EDWARD MASON
Priority to GB3468556A priority Critical patent/GB823731A/en
Publication of GB823731A publication Critical patent/GB823731A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Abstract

823,731. Drills; making drills. MASON, R. E., HEIR, A. H., and ALDRIDGE, H. Nov. 13, 1957 [Nov. 13, 1956], No. 34685/56. Classes 83 (2) and 83 (3). A masonry drill comprises a tip 2 of tungsten carbide secured, as by brazing, to a shank 1, of round section, having at least one helical rib 3 integral therewith. The shank, of hardenable nickel-molybdenum-chromium alloy-steel and preferably having three or four ribs, may be extruded and then twisted to give the ribs a helical form. The stock is then cut into drill lengths, machined and hardened. The depth of the ribs is between 0.02-0.06 ins., and the tip preferably projects slightly further, radially, than the ribs.
GB3468556A 1956-11-13 1956-11-13 Improvements in or relating to masonry drills Expired GB823731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3468556A GB823731A (en) 1956-11-13 1956-11-13 Improvements in or relating to masonry drills

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3468556A GB823731A (en) 1956-11-13 1956-11-13 Improvements in or relating to masonry drills

Publications (1)

Publication Number Publication Date
GB823731A true GB823731A (en) 1959-11-18

Family

ID=10368692

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3468556A Expired GB823731A (en) 1956-11-13 1956-11-13 Improvements in or relating to masonry drills

Country Status (1)

Country Link
GB (1) GB823731A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2211532A1 (en) * 1972-03-10 1973-09-13 Hawera Probst Kg Hartmetall DRILLS, IN PARTICULAR STONE DRILLS
FR2407044A1 (en) * 1977-10-28 1979-05-25 Radioelectrique Comp Ind Drill bit for invalidating bank notes - has head of greater dia. than shaft with two parallel edges and two pairs of oblique edges

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2211532A1 (en) * 1972-03-10 1973-09-13 Hawera Probst Kg Hartmetall DRILLS, IN PARTICULAR STONE DRILLS
FR2407044A1 (en) * 1977-10-28 1979-05-25 Radioelectrique Comp Ind Drill bit for invalidating bank notes - has head of greater dia. than shaft with two parallel edges and two pairs of oblique edges

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