US PATENT SUBCLASS 470 / 203
.~.~.~ Wedge core

Current as of: June, 1999
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470 /   HD   THREADED, HEADED FASTENER, OR WASHER MAKING: PROCESS AND APPARATUS

183  DF  IMPLEMENT, E.G., DIE, ETC. {10}
198  DF  .~ Tap {4}
201  DF  .~.~ Collapsible {2}
203.~.~.~ Wedge core

DEFINITION

Classification: 470/203

Wedge core:

(under subclass 201) Subject matter wherein the device is actuated by a triangular shaped or conical surface which engages the device.