Invention Grant
- Patent Title: Down-the-hole hammer with pilot and method of enlarging a hole
- Patent Title (中): 井下锤与飞行员和扩大孔的方法
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Application No.: US11278013Application Date: 2006-03-30
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Publication No.: US07673706B2Publication Date: 2010-03-09
- Inventor: Rob A. Simmons
- Applicant: Rob A. Simmons
- Applicant Address: SE Sandviken
- Assignee: Sandvik Intellectual Property AB
- Current Assignee: Sandvik Intellectual Property AB
- Current Assignee Address: SE Sandviken
- Agency: WRB-IP LLP
- Main IPC: E21B7/28
- IPC: E21B7/28 ; E21B10/40
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.
Public/Granted literature
- US20070227777A1 DOWN-THE-HOLE HAMMER WITH PILOT AND METHOD OF ENLARGING A HOLE Public/Granted day:2007-10-04
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