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Class Information
Number: 175/270
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > Cutter element shifted by dropped element
Description: Apparatus in which the laterally movable cutter element is moved laterally by means of a part which is specifically described as being dropped from above ground to an operative position below ground.

Patents under this class:

Patent Number Title Of Patent Date Issued
8205689 Stabilizer and reamer system having extensible blades and bearing pads and method of using same Jun. 26, 2012
7673708 Ball-activated mechanism for controlling the operation of a downhole tool Mar. 9, 2010
6443247 Casing drilling shoe Sep. 3, 2002

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