US PATENT SUBCLASS 411 / 263
.~.~ Differential thread means

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}
263.~.~ Differential thread means

DEFINITION

Classification: 411/263

Differential thread means:

(under subclass 259) Device wherein a discrete locking member is provided with threads which engage complementary threads on either of the threaded elements causing the mating threads on said elements to be biased axially into tight, frictional engagement.

(1) Note. The threads on the locking member may be of a different pitch and/or hand from those on the mating threaded

elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

312, in regard to the reference to this subclass (263) appearing in (1) Note thereof.