US PATENT SUBCLASS 411 / 209
.~.~ Member includes key, screw, tongue, etc. perpendicular to threads

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}
209.~.~ Member includes key, screw, tongue, etc. perpendicular to threads {2}
210  DF  .~.~.~> Utilizing a resilient characteristic of the key, or of a discrete element {1}
212  DF  .~.~.~> Including plastically deformable portion {1}

DEFINITION

Classification: 411/209

Member includes key, screw, tongue, etc. perpendicular to threads:

(under subclass 204) Device wherein at least one of the distinct members ordinarily comprises a pin, wedge, clip, dog, etc., which is inserted by movement from one side of the externally threaded and the internally threaded elements toward, and more or less normally to, their longitudinal axis, which pin, etc., usually is received in part in each of the threaded elements and thus forms a positive interlock therebetween.