US PATENT SUBCLASS 411 / 332
.~ Including teeth of the ramp and buttress type on the axially inwardly facing portion of the internally threaded element

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}
332.~ Including teeth of the ramp and buttress type on the axially inwardly facing portion of the internally threaded element

DEFINITION

Classification: 411/332

Including teeth of the ramp and buttress type on the axially inwardly facing portion of the internally threaded element:

(under subclass 190) Device wherein the means for limiting or preventing the turning of one threaded element with respect to the other threaded element includes, on the axially inwardly facing portion (e.g., surface) of the internally threaded element, a plurality of projections of the kind which, in profile, display a gradual slope leading to the outermost region of the projection followed by a sharp (e.g., a perpendicular) drop to a base line.

SEE OR SEARCH THIS CLASS, SUBCLASS:

227+, 240, and 326+, for rotation restricting means which include a ratchet, and with the further observation that a ratchet frequently has teeth which are of the ramp and buttress type.