US PATENT SUBCLASS 411 / 197
.~.~ Structure is coaxial, distinct member (e.g., washer) that restricts nut piece when fixed

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.~.~ Structure is coaxial, distinct member (e.g., washer) that restricts nut piece when fixed {3}
198  DF  .~.~.~> Utilizing a resilient characteristic of the member, or of a discrete element {1}
200  DF  .~.~.~> Member comprises key movable laterally into engagement with threaded elements
201  DF  .~.~.~> Member includes plastically deformable portion

DEFINITION

Classification: 411/197

Structure is coaxial, distinct member (e.g., washer) that restricts nut piece when fixed:

(under subclass 191) Device wherein the one threaded element is the internally threaded one, and the at least one, more or less flat, radially outwardly facing surface is found on that threaded element.