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Class Information
Number: 175/288
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by longitudinally relatively movable parts > Cam or gear engaging cutter element > Cutter element substantially longitudinally movable on shaft
Description: Apparatus in which the laterally movable cutter element is carried on the bit head or shaft so that the cutter element moves generally longitudinally relative to the bit head or shaft to cause the movement of the cutter element.

Patents under this class:

Patent Number Title Of Patent Date Issued
7757787 Drilling and hole enlargement device Jul. 20, 2010
7506703 Drilling and hole enlargement device Mar. 24, 2009
6591922 Pantograph underreamer and method for forming a well bore cavity Jul. 15, 2003
6550553 Boring apparatus Apr. 22, 2003
6378629 Boring apparatus Apr. 30, 2002
5070951 Drill for water wells Dec. 10, 1991
4915181 Tubing bit opener Apr. 10, 1990
4889197 Hydraulic operated underreamer Dec. 26, 1989
4709761 Well conduit joint sealing system Dec. 1, 1987
4407376 Under-reaming pile bore excavator Oct. 4, 1983
4068711 Casing cutter Jan. 17, 1978

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