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Class Information
Number: 175/392
Name: Boring or penetrating the earth > Bit or bit element > Bit with leading portion (e.g., pilot) forming smaller diameter initial bore > Leading portion is forked rotary type
Description: Apparatus comprising a rotary bit in which the leading or pilot portion is provided with two or more axially extending branches terminating in cutting edges.










Patents under this class:

Patent Number Title Of Patent Date Issued
7513319 Reamer bit Apr. 7, 2009
6502649 Ice auger cutting head Jan. 7, 2003
6202768 Rock drilling tool and reamer for percussive drilling Mar. 20, 2001
4550791 Two-prong rotary bit, especially for use with roof drills, and insert therefor Nov. 5, 1985
4074780 Earth auger Feb. 21, 1978
3995706 Earth auger drill Dec. 7, 1976











 
 
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