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:
Oct. 02, 2018
Filed:
May. 02, 2016
Applicant:
Sandvik Intellectual Property Ab, Sandviken, SE;
Inventors:
Assignee:
SANDVIK INTELLECTUAL PROPERTY AB, Sandviken, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 17/18 (2006.01); E21B 21/12 (2006.01); E21B 17/03 (2006.01); E21B 6/00 (2006.01); E21B 6/04 (2006.01); E21B 17/04 (2006.01); E21B 17/16 (2006.01);
U.S. Cl.
CPC ...
E21B 17/03 (2013.01); E21B 6/00 (2013.01); E21B 6/04 (2013.01); E21B 17/04 (2013.01); E21B 17/16 (2013.01);
Abstract
A rock drilling shank adaptor has at least one flush hole extending radially through the body of the adaptor in communication with an axially extending internal bore. The flush hole in a direction from an external side to an internal side includes a surface at a rearward region that is curved at least at a radially inner portion to extend in an axial direction towards a forwardmost end of the adaptor to increase the resistance of the adaptor to stress concentrations whilst achieving a desired flow rate of flushing fluid flow into the internal bore.