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Class Information
Number: 175/357
Name: Boring or penetrating the earth > Bit or bit element > Rolling cutter bit or rolling cutter bit element > Circumferentially displaced cutter axes > Detachable multiaxis support or spider
Description: Apparatus in which all of the cutter elements are journaled on a separate axle or pin supported by a frame, bracket, or securing means which is readily detachable from the bit head in such manner that all of the axles or pins may be detached simultaneously.

Patents under this class:

Patent Number Title Of Patent Date Issued
7845437 Hole opener assembly and a cone arm forming a part thereof Dec. 7, 2010
7823657 Drilling assembly, drilling reamer arm assembly, and methods of drilling Nov. 2, 2010
5439067 Rock bit with enhanced fluid return area Aug. 8, 1995
4832135 Flow through raise boring bit May. 23, 1989
4182425 Reamer Jan. 8, 1980

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