US PATENT SUBCLASS 175 / 349
.~.~.~ With transverse axis cutter

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}
348  DF  .~.~ Longitudinal axis cutter {1}
349.~.~.~ With transverse axis cutter

DEFINITION

Classification: 175/349

(under subclass 348) Apparatus in which an additional rolling

cutter element is mounted on an axis extending transversely of the bit head.