US PATENT SUBCLASS 175 / 288
.~.~.~ Cutter element substantially longitudinally movable on shaft


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

263  DF  CUTTER ELEMENT LATERALLY SHIFTABLE BELOW GROUND (E.G., EXPANSIBLE) {13}
284  DF  .~ Cutter element shifted by longitudinally relatively movable parts {2}
286  DF  .~.~ Cam or gear engaging cutter element {3}
288.~.~.~ Cutter element substantially longitudinally movable on shaft


DEFINITION

Classification: 175/288

(under subclass 286) Apparatus in which the laterally movable cutter element is carried on the bit head or shaft so that the cutter element moves generally longitudinally relative to the bit head or shaft to cause the movement of the cutter element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

255, for core retaining or severing means of the sliding wedged type.

281+, for a laterally shiftable cutter element longitudinally movable on the shaft by a mechanism which spring biases the cutter to operative position.