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:
Aug. 07, 2018
Filed:
Dec. 11, 2014
Applicant:
Sandvik Intellectual Property Ab, Sandviken, SE;
Inventor:
Olivier Bruandet, Tampere, FI;
Assignee:
SANDVIK INTELLECTUAL PROPERTY AB, Sandviken, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 4/14 (2006.01); E21B 10/36 (2006.01); E21B 17/07 (2006.01);
U.S. Cl.
CPC ...
E21B 17/076 (2013.01); E21B 4/14 (2013.01); E21B 10/36 (2013.01);
Abstract
A quick release down-the-hole (DTH) hammer drill bit assembly includes a drill bit releaseably retained at a drive transmission component (drive sub) via a retaining sleeve and respective retaining formations to axially couple and lock the drill bit at the assembly. In particular, the drill bit is retained exclusively at the assembly via retaining formations at the drive sub, the sleeve and the drill bit, without a requirement for additional retaining rings that would otherwise axially lock the drill bit at the drive sub.