US PATENT SUBCLASS 411 / 415
.~.~ Of varying thread pitch

Current as of: June, 1999
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411 /   HD   EXPANDED, THREADED, DRIVEN, HEADED, TOOL-DEFORMED, OR LOCKED-THREADED FASTENER

378  DF  EXTERNALLY THREADED FASTENER ELEMENT, E.G., BOLT, SCREW, ETC. {16}
411  DF  .~ Thread or shank structure {7}
415.~.~ Of varying thread pitch

DEFINITION

Classification: 411/415

Of varying thread pitch:

(under subclass 411) Subject matter wherein the pitch of the ridge is not uniform throughout the length of the ridge.

(1) Note. The variation in pitch may constitute a variance of any type over any portion of the thread.

SEE OR SEARCH THIS CLASS, SUBCLASS:

307, for a threaded bolt and nut and means for coupling them against rotation relative to one another and wherein the means comprises a thread lock and further wherein the locking results from the use of (a) a thread of one pitch on the bolt (or nut) and thread of a different pitch on the nut (or bolt) or (b) a thread on either the bolt or the nut which has a particular pitch in one increment of its length and a different pitch in another increment thereof.