US PATENT SUBCLASS 411 / 341
.~.~ And biasing spring

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

337  DF  HEADED FASTENER ELEMENT WITH NUT, WASHER, SECURING MEANS OR CAP {12}
340  DF  .~ Securing means pivotable about axis transverse to fastener axis, e.g., toggle bolt, etc. {4}
341.~.~ And biasing spring {2}
342  DF  .~.~.~> Spring engaging securing means
343  DF  .~.~.~> Spring at opposite end from securing means

DEFINITION

Classification: 411/341

And biasing spring:

(under subclass 340) Subject matter further provided with an elastic structure tending to return to its normal shape after being distorted.