Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Rob A. Simmons0
Date of Patent
March 9, 2010
0Patent Application Number
112780130
Date Filed
March 30, 2006
0Patent Primary Examiner
Patent 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.
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