US PATENT SUBCLASS 470 / 103
.~.~ And yieldable tap driver

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

87  DF  APPARATUS FOR MAKING INTERNALLY THREADED FASTENER, I.E., NUT {7}
96  DF  .~ Having tapper {7}
103.~.~ And yieldable tap driver {1}
104  DF  .~.~.~> Feed nut type

DEFINITION

Classification: 470/103

And yieldable tap driver:

(under subclass 96) Subject matter further provided with a mechanism capable of imparting motion to the thread cutting means and wherein the mechanism is structured to adjust or stop the motion upon the completion of a cutting step or upon incurring abnormal resistance to the cutting operation.

SEE OR SEARCH CLASS

81, Tools,

467+, for wrenches or screwdrivers which yield upon predetermined overload.