US PATENT SUBCLASS 175 / 383
.~.~ Adjustment presents different cutting edge

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

327  DF  BIT OR BIT ELEMENT {21}
382  DF  .~ Adjustable cutter element {2}
383.~.~ Adjustment presents different cutting edge

DEFINITION

Classification: 175/383

(under subclass 382) Apparatus in which the cutter element may be selectively held in different positions for the purpose of placing a different cutting edge in operative position for engaging the formation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

379, for a cutter element adjustable during operation to present a new cutting edge.

SEE OR SEARCH CLASS

172, Earth Working,

735, for an earth working tool which is adjustable to present different working portions.