US PATENT SUBCLASS 411 / 321
.~ With an elongated member in the nature of a rotation preventing key disposed axially of the threaded elements

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}
321.~ With an elongated member in the nature of a rotation preventing key disposed axially of the threaded elements {2}
322  DF  .~.~> And utilizing a resilient characteristic of the key, or of a discrete element
323  DF  .~.~> And including a plastically deformable portion

DEFINITION

Classification: 411/321

With an elongated member in the nature of a rotation preventing key disposed axially of the threaded elements:

(under subclass 190) Device provided with one or more distinct members having a rotation restricting capability and at least one of them ordinarily comprising a dowel, pin, rod, etc., which dowel, etc., is positioned generally parallel to the longitudinal axis of the threaded elements and is usually received in part in each of them, thus tending to form a positive interlock therebetween.

(1) Note. In a few instances, the member includes a portion which is adapted to extend into a transverse opening provided in the externally threaded element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

216+, for a threaded bolt and nut and means for coupling them against rotation relative to one another and wherein the means includes a discrete, rotation restricting member which confronts an axially outwardly facing portion of the nut and further wherein the member includes, as a substantial part thereof, an elongated, axially disposed portion in the nature of a key.

292+, for a member which may closely resemble the member of this subclass (321) as to appearance or orientation, but which member is an element of a thread lock.