US PATENT SUBCLASS 175 / 372
.~.~.~ Antifriction type

Current as of: June, 1999
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175 /   HD   BORING OR PENETRATING THE EARTH

327  DF  BIT OR BIT ELEMENT {21}
331  DF  .~ Rolling cutter bit or rolling cutter bit element {26}
371  DF  .~.~ With bearing or seal details {1}
372.~.~.~ Antifriction type

DEFINITION

Classification: 175/372

(under subclass 371) Apparatus in which the bearing is an antifriction bearing employing rolling elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

370, for antifriction bearings which may be disassembled to release a rolling cutter from its support axle.