US PATENT SUBCLASS 411 / 231
.~.~.~.~ With means resiliently biasing the nuts apart

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}
204  DF  .~ Structure is coaxial, distinct member (e.g., washer, key, or nut portion) that restricts nut piece {7}
222  DF  .~.~ Internally threaded locking member (e.g., jam nut) {1}
223  DF  .~.~.~ Including means associated with at least one of the nuts for restricting rotation therebetween {11}
231.~.~.~.~ With means resiliently biasing the nuts apart

DEFINITION

Classification: 411/231

With means resiliently biasing the nuts apart:

(under subclass 223) Device wherein the internally threaded elements are urged in axially opposite directions by a springlike force to cause frictional binding with the threads of the externally threaded element.

(1) Note. The resilient bias may be inherent in the material from which the elements are formed.