Roller cutter with gauge cutting reamer
United States Patent 2927777
US Patent References:
/1143271.html
- - 1143271

Drilling device
- - 2228286

Cutting tool and method of making
- - 2660405

Roller cutter for earth drills
- - 2774570


Inventors:
Steen, James B.
Publication Date:
03/08/1960
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Assignee:
CHICAGO PNEUMATIC TOOL CO
Primary Class:
175/378
Other Classes:
175/374
International Classes:
E21B10/16; E21B10/08
Foreign References:
CA465604A