US PATENT SUBCLASS 411 / 217
.~.~.~ Key coacts with bolt by occupying an axially extending recess formed in the radially outward surface thereof

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}
216  DF  .~.~ Member or portion includes an axially disposed key {1}
217.~.~.~ Key coacts with bolt by occupying an axially extending recess formed in the radially outward surface thereof {3}
218  DF  .~.~.~.~> And includes a portion adapted to extend into a transverse opening provided in the bolt
219  DF  .~.~.~.~> And includes a portion adapted to engage a substantial part of the periphery of the bolt
220  DF  .~.~.~.~> And includes a region plastically deformable into engagement with the axially outwardly facing portion

DEFINITION

Classification: 411/217

Key coacts with bolt by occupying an axially extending recess formed in the radially outward surface thereof:

(under subclass 216) Device wherein the externally threaded element receives the elongated portion of the member in a recess formed in its outer surface and extending longitudinally thereof.