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:
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