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:
Mar. 09, 2010
Filed:
Mar. 30, 2006
Applicant:
Rob A. Simmons, Arlington, TX (US);
Inventor:
Rob A. Simmons, Arlington, TX (US);
Assignee:
Sandvik Intellectual Property AB, Sandviken, SE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21B 7/28 (2006.01); E21B 10/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
A down-the-hole hammer includes a piston movably disposed in a casing and a percussion bit at an end of the casing. The percussion bit includes an integral bit and shank and a pilot removably fastened at a forward end of the bit. A method of enlarging a preexisting hole is also provided.