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:
Dec. 14, 2021
Filed:
Feb. 06, 2019
Applicant:
James Jing Yao, Mississauga, CA;
Inventor:
James Jing Yao, Mississauga, CA;
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 17/042 (2006.01); E21B 10/42 (2006.01); E21B 10/38 (2006.01);
U.S. Cl.
CPC ...
E21B 17/0426 (2013.01); E21B 10/38 (2013.01); E21B 10/42 (2013.01); B23G 2210/44 (2013.01);
Abstract
An internally threaded bit for percussion drilling is provided, which has thread roots wider than the thread crests. A single drill bit, configured according to the present invention, can be connected to a variety of rods, having differing crest widths in their male threads. The invention enables the service life of the rods to be optimized to suit the drilling conditions at hand, without the need to manufacture and keep in inventory a correspondingly large variety of drill bits. The bit of the invention exhibits a reduced rate of ringing off, and can accept drill rods having a range of crest widths.