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Class Information
Number: 175/283
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > With shifting mechanism spring biased to operative position > Cutter element substantially longitudinally movable on shaft > With forwardly extending noncutting portion
Description: Apparatus in which the laterally movable cutter element is carried on a bit head or shaft which has a portion extending inwardly toward the axis of the bit and forward of the cutter element in the direction of boring and which has no cutting function.

Patents under this class:

Patent Number Title Of Patent Date Issued
8016053 Drill bit configurations for parked-bit or through-the-bit-logging Sep. 13, 2011
4407376 Under-reaming pile bore excavator Oct. 4, 1983
4401172 Drilling tool Aug. 30, 1983

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