US PATENT SUBCLASS 411 / 201
.~.~.~ Member includes plastically deformable portion

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}
191  DF  .~ Structure contacts nut piece side and is fixed to the nut {3}
197  DF  .~.~ Structure is coaxial, distinct member (e.g., washer) that restricts nut piece when fixed {3}
201.~.~.~ Member includes plastically deformable portion

DEFINITION

Classification: 411/201

Member includes plastically deformable portion:

(under subclass 197) Device wherein the distinct member, or one of them, includes at least one region which, when bent or otherwise reshaped, is adapted to remain in its changed configuration (i.e., the elastic limit of the material from which the member is formed has been exceeded).

(1) Note. The reshaping may relate to the retaining of the member in its operative position, rather than to the member's function of restricting rotation.