US PATENT SUBCLASS 411 / 306
.~.~.~ Resilient element

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

190  DF  HAVING STRUCTURE TO RESTRICT ROTATION OF THREADED, MATING PIECES (E.G., NUT LOCK) {13}
259  DF  .~ Comprising a thread lock {18}
305  DF  .~.~ Externally threaded element adapted to be compressed radially inwardly {1}
306.~.~.~ Resilient element

DEFINITION

Classification: 411/306

Resilient element:

(under subclass 305) Device wherein the externally threaded element, or at least the threaded portion thereof, is sufficiently resilient in nature (i.e., has a sufficiently high limit of elasticity) that, upon removal of the internally threaded element, it expands outwardly to its previous dimension.