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Class Information
Number: 175/275
Name: Boring or penetrating the earth > Cutter element laterally shiftable below ground (e.g., expansible) > With shifting mechanism spring biased to operative position > With separate latch
Description: Apparatus combined with a movable member which is separate from the laterally movable cutter element and which engages the cutter element or some part of the resiliently biased mechanism to hold the cutter element in one position.

Sub-classes under this class:

Class Number Class Name Patents
175/276 Frangible or discardable element 6
175/277 Latch holds mechanism retracted 2

Patents under this class:

Patent Number Title Of Patent Date Issued
7703553 Downhole tool having radially extendable members Apr. 27, 2010
4693328 Expandable well drilling tool Sep. 15, 1987

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