GB178720A - Improvements in rock drills - Google Patents

Improvements in rock drills

Info

Publication number
GB178720A
GB178720A GB1156321A GB1156321A GB178720A GB 178720 A GB178720 A GB 178720A GB 1156321 A GB1156321 A GB 1156321A GB 1156321 A GB1156321 A GB 1156321A GB 178720 A GB178720 A GB 178720A
Authority
GB
United Kingdom
Prior art keywords
radial
cutting
rock drills
teeth
drills
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
GB1156321A
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 GB1156321A priority Critical patent/GB178720A/en
Publication of GB178720A publication Critical patent/GB178720A/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

Abstract

178,720. Stahlberg, E. April 21, 1921. Drills.-In a rock drill having breaking surfaces between the cutting-teeth, the outer teeth are radial to the drill axis. A detachable cutter b has radial cutting-edges c and an eccentric edge d, separated by breaking surfaces e, and is twisted in accordance with the twist of the stem a. Attachment is effected by a rib f, central pin g and rivet k. Specification 171,792 is referred to.
GB1156321A 1921-04-21 1921-04-21 Improvements in rock drills Expired GB178720A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1156321A GB178720A (en) 1921-04-21 1921-04-21 Improvements in rock drills

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1156321A GB178720A (en) 1921-04-21 1921-04-21 Improvements in rock drills

Publications (1)

Publication Number Publication Date
GB178720A true GB178720A (en) 1922-04-27

Family

ID=9988531

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1156321A Expired GB178720A (en) 1921-04-21 1921-04-21 Improvements in rock drills

Country Status (1)

Country Link
GB (1) GB178720A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701126A (en) * 1950-08-15 1955-02-01 Austin Powder Co Auger head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2701126A (en) * 1950-08-15 1955-02-01 Austin Powder Co Auger head

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