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:
May. 26, 2020
Filed:
Mar. 01, 2017
Applicant:
Sandvik Intellectual Property Ab, Sandviken, SE;
Inventor:
Olivier Bruandet, Tampere, FI;
Assignee:
Sandvik Intellectual Property AB, Sandviken, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 10/36 (2006.01); E21B 34/06 (2006.01); E21B 4/14 (2006.01); E21B 6/02 (2006.01); E21B 17/07 (2006.01); E21B 44/00 (2006.01);
U.S. Cl.
CPC ...
E21B 10/36 (2013.01); E21B 34/06 (2013.01); E21B 4/145 (2013.01); E21B 6/02 (2013.01); E21B 17/076 (2013.01); E21B 44/005 (2013.01);
Abstract
A down-the-hole hammer drill bit retaining assembly is arranged to releasably retain a drill bit at a hammer arrangement of a percussion drilling apparatus. The retaining assembly includes a drive sub and a retainer ring. The drive sub has at least one indent to provide a fluid communication pathway for a flushing fluid extending over a radially outward facing surface of the retainer ring and into an internal region of the drive sub in contact with inwardly projecting splines.