The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1984
Filed:
Mar. 02, 1982
Applicant:
Inventor:
Bernt S Liljekvist, Storvik, SE;
Assignee:
Santrade Ltd., Lucerne, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B / ;
U.S. Cl.
CPC ...
175325 ; 175408 ; 308 / ;
Abstract
A guiding means in rock drilling for guiding a percussion drill string (10) comprises a guide sleeve (17). For purposes of ensuring free rotation between the drill string (10) and the guide sleeve (17) the latter is bound by shape to the drill string at its one end during drilling as well as during withdrawal of the drill string (10).
Liljekvist, Bernt. (1984). Guiding device for percussion drills (U.S. Patent No. 4441565). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4441565
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile