US PATENT SUBCLASS 411 / 4
.~.~.~ Shear pin connecting means

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

1  DF  TORQUE RESPONSIVE NUT OR BOLT DRIVING CONNECTION {2}
2  DF  .~ Frangible connection {1}
3  DF  .~.~ Between concentric elements {2}
4.~.~.~ Shear pin connecting means

DEFINITION

Classification: 411/4

Shear pin connecting means:

(under subclass 3) Subject matter wherein the holding device and the driving section are joined together by a separate element usually disposed in aligned apertures therein which shears upon the application of torque in excess of a predetermined limit.