GB202342A - Improved boring apparatus - Google Patents

Improved boring apparatus

Info

Publication number
GB202342A
GB202342A GB752222A GB752222A GB202342A GB 202342 A GB202342 A GB 202342A GB 752222 A GB752222 A GB 752222A GB 752222 A GB752222 A GB 752222A GB 202342 A GB202342 A GB 202342A
Authority
GB
United Kingdom
Prior art keywords
boring apparatus
improved boring
couplings
rod
improved
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
GB752222A
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 GB752222A priority Critical patent/GB202342A/en
Publication of GB202342A publication Critical patent/GB202342A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/22—Hand tools or hand-held power-operated tools specially adapted for dislodging minerals

Abstract

202,342. Mackintosh, F. H. Dec. 14, 1922. Rod couplings.-Rod sections b of an earth boring tool are connected by couplings c of circular cross-section and double tapered with curved profile.
GB752222A 1922-12-14 1922-12-14 Improved boring apparatus Expired GB202342A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB752222A GB202342A (en) 1922-12-14 1922-12-14 Improved boring apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB752222A GB202342A (en) 1922-12-14 1922-12-14 Improved boring apparatus

Publications (1)

Publication Number Publication Date
GB202342A true GB202342A (en) 1923-08-23

Family

ID=9834726

Family Applications (1)

Application Number Title Priority Date Filing Date
GB752222A Expired GB202342A (en) 1922-12-14 1922-12-14 Improved boring apparatus

Country Status (1)

Country Link
GB (1) GB202342A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3208542A (en) * 1959-05-08 1965-09-28 Fischer Artur Dowel bit
US4258808A (en) * 1978-03-02 1981-03-31 Hawera Probst Gmbh & Co. Rock drill

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3208542A (en) * 1959-05-08 1965-09-28 Fischer Artur Dowel bit
US4258808A (en) * 1978-03-02 1981-03-31 Hawera Probst Gmbh & Co. Rock drill

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