US PATENT SUBCLASS 175 / 350
.~.~ Laterally offset cutter axis

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}
350.~.~ Laterally offset cutter axis {2}
351  DF  .~.~.~> Disk blade {1}
353  DF  .~.~.~> Cone or frustum rolling cutter

DEFINITION

Classification: 175/350

(under subclass 331) Apparatus in which the axis of the rolling cutter element is offset from a radial vertical plane containing the longitudinal axis of the bit.

(1) Note. The purpose of offsetting the cutter axis is to obtain a sliding or scraping cut but enough radial component is usually provided for the cutter axis to cause the cutters to roll as well as slide.