US PATENT SUBCLASS 470 / 201
.~.~ Collapsible
Current as of:
June, 1999
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470 /
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THREADED, HEADED FASTENER, OR WASHER MAKING: PROCESS AND APPARATUS
183
DF
IMPLEMENT, E.G., DIE, ETC.
{10}
198
DF
.~ Tap {4}
201
.~.~ Collapsible {2}
202
DF
.~.~.~
> Cam core
203
DF
.~.~.~
> Wedge core
DEFINITION
Classification: 470/201
Collapsible:
(under subclass 198) Subject matter wherein the component is structured such that it may be readily retracted toward the axis of the device to allow its withdrawal from a formed hole without reversing any rotary motion of the device.