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:
Nov. 21, 2017
Filed:
May. 21, 2015
Applicant:
Center Rock Inc., Berlin, PA (US);
Inventor:
Leland H. Lyon, Roanoke, VA (US);
Assignee:
Center Rock Inc., Berlin, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B 10/36 (2006.01); E21B 10/62 (2006.01); B23P 15/28 (2006.01); E21B 10/46 (2006.01);
U.S. Cl.
CPC ...
B23P 15/28 (2013.01); E21B 10/36 (2013.01); E21B 10/46 (2013.01); Y10T 29/49996 (2015.01);
Abstract
A drill bit for a down-the-hole drill hammer is provided that includes a head and a shank extending from the head. The head includes a plurality of non-concentrically or spirally arranged cutting members about its working face. The non-concentric or spiral arrangement of the cutting members in the drill bit and their overlapping cutting paths during rotation of the drill bit reduces the presence of concentric grooves or valleys being cut into the earthen terrain impacted by the bit thereby resulting in more complete cutting coverage.