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Class Information
Number: 175/114
Name: Boring or penetrating the earth > With means to simultaneously feed and rotate tool from a single mechanical element > Constant rotation rate permitted regardless of (1) release of feed force, or (2) change in feed rate
Description: Apparatus in which the mechanical movement, or means coupling the mechanical movement to the rotary drive and/or feed is adapted to rotate the tool at a uniform speed while permitting (1) complete disconnection of the feed drive or (2) a change in the speed at which the tool is being fed into the work.

Patents under this class:

Patent Number Title Of Patent Date Issued
5458207 Method and an equipment for adjusting rock drilling Oct. 17, 1995
4719978 Earth drilling device Jan. 19, 1988
4431063 Drive mechanism for drill Feb. 14, 1984
4421183 Flexible drive apparatus for boring lateral bore holes from well Dec. 20, 1983

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