US PATENT SUBCLASS 411 / 308
.~.~ Involving dissimilarities in the sectional configuration of the threads

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}
308.~.~ Involving dissimilarities in the sectional configuration of the threads {1}
309  DF  .~.~.~> Resulting in the deformation of one thread by the other {1}

DEFINITION

Classification: 411/308

Involving dissimilarities in the sectional configuration of the threads:

(under subclass 259) Device wherein the locking is occasioned by a sufficient departure, on the part of the thread of one of the threaded elements, from the shape, in cross section, of the thread of the other threaded element, that the two threads will no longer operatively engage with one another without binding to one degree or another.

(1) Note. The cross-sectional shape is that displayed by a section containing the longitudinal axis of the elements.