US PATENT SUBCLASS 411 / 244
.~.~.~.~ Oppositely threaded

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}
244.~.~.~.~ Oppositely threaded {1}
245  DF  .~.~.~.~.~> Intersecting threads on the bolt

DEFINITION

Classification: 411/244

Oppositely threaded:

(under subclass 223) Device wherein one of the internally threaded elements has a right-hand thread while the other has a left-hand thread, and the externally threaded element includes threaded portions mating with each of them.