Bit or bit element > Bit with leading portion (e.g., pilot) forming smaller diameter initial bore > Leading portion is forked rotary type > Patents

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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