US PATENT SUBCLASS 411 / 307
.~.~ Having threads of different pitch, or a thread of varying pitch


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}
307.~.~ Having threads of different pitch, or a thread of varying pitch


DEFINITION

Classification: 411/307

Having threads of different pitch, or a thread of varying pitch:

(under subclass 259) Device wherein the locking is occasioned by either (a) the use of a thread frequency on one of the threaded elements which is greater or less than the thread

frequency of the other threaded element or (b) the use, on one of the threaded elements, of a thread frequency which is different in one longitudinal region of the element than in another longitudinal region thereof.