GB283745A - Improvements in drills for drilling stone, concrete, bricks or other like material - Google Patents

Improvements in drills for drilling stone, concrete, bricks or other like material

Info

Publication number
GB283745A
GB283745A GB211527A GB211527A GB283745A GB 283745 A GB283745 A GB 283745A GB 211527 A GB211527 A GB 211527A GB 211527 A GB211527 A GB 211527A GB 283745 A GB283745 A GB 283745A
Authority
GB
United Kingdom
Prior art keywords
drills
bricks
concrete
drilling stone
drill
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
GB211527A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB211527A priority Critical patent/GB283745A/en
Publication of GB283745A publication Critical patent/GB283745A/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

283,745. Lazenby, T. Jan. 25,1927. Percussive drills.-A percussive drill for drilling stone &c. has a flat cutting end B terminating in a single point E on the axis of the drill and a helically twisted stem forming a helical groove D for removing the debris and a helical thread C which is backed off to present a cutting edge to the material being drilled.
GB211527A 1927-01-25 1927-01-25 Improvements in drills for drilling stone, concrete, bricks or other like material Expired GB283745A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB211527A GB283745A (en) 1927-01-25 1927-01-25 Improvements in drills for drilling stone, concrete, bricks or other like material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB211527A GB283745A (en) 1927-01-25 1927-01-25 Improvements in drills for drilling stone, concrete, bricks or other like material

Publications (1)

Publication Number Publication Date
GB283745A true GB283745A (en) 1928-01-19

Family

ID=9733861

Family Applications (1)

Application Number Title Priority Date Filing Date
GB211527A Expired GB283745A (en) 1927-01-25 1927-01-25 Improvements in drills for drilling stone, concrete, bricks or other like material

Country Status (1)

Country Link
GB (1) GB283745A (en)

Similar Documents

Publication Publication Date Title
US2319528A (en) Apparatus for drilling holes in stone
GB283745A (en) Improvements in drills for drilling stone, concrete, bricks or other like material
US1512841A (en) Coal drill
GB203039A (en) Improvements in percussive rock drilling tools with renewable cutters
GB1119043A (en) Percussion drill
US1746046A (en) Drill
GB233448A (en) Rotary or percussive bit for use in drilling stone and like materials
US1781413A (en) Drilling bit
US2876995A (en) Percussion drills
GB423647A (en) Improvements in stone boring tools, rock drills, and the like
GB212618A (en) Improvements in and relating to twist drills, reamers and the like tools
US1561580A (en) Drill bit
GB189021A (en) Drills
SU83239A1 (en) Conical connection of detachable drill bits with rods
GB599451A (en) An improved boring bit for use in drilling coal, stone and the like
SU386118A1 (en) DRILLING BIT
SU4498A1 (en) Fixture for using tube drills in cork production
GB206761A (en) An improved percussion tool
GB658631A (en) Improvements in percussive drill bits
GB333489A (en) Improvements in or relating to a cutting tool for rock drills of the percussion type
SU106979A1 (en) Tubular drill bit for glass, ceramics, quartz and similar materials
GB658047A (en) Drills for use in brickwork, stone and like materials
GB191026243A (en) Improvements relating to Wedge-terriers.
GB245373A (en) Improvements in percussion drill bits for drilling wells and the like
GB546086A (en) Improvements in or relating to detachable bits for percussive rock drills