US PATENT SUBCLASS 411 / 260
.~.~ Including a distortable metallic washer or sleeve

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}
260.~.~ Including a distortable metallic washer or sleeve {1}
261  DF  .~.~.~> In the nature of a dished washer

DEFINITION

Classification: 411/260

Including a distortable metallic washer or sleeve:

(under subclass 259) Device wherein the rotation restricting means includes a substantially annular member of more or less readily deformable metal which is disposed in concentric relationship with the threaded elements and moves, upon deformation, into tight engagement with the threads of at least one of the elements.