US PATENT SUBCLASS 411 / 287
.~.~.~.~ By axially directed impacted areas

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}
276  DF  .~.~ Having the internally threaded element distorted {2}
285  DF  .~.~.~ Axial distortion {4}
287.~.~.~.~ By axially directed impacted areas

DEFINITION

Classification: 411/287

By axially directed impacted areas:

(under subclass 285) Device wherein the distortion comprises areas of the endwalls of the element having the material thereof compressed in a direction substantially parallel to the longitudinal axis of said element, resulting in the convolutions of corresponding thread portions being moved closer together to define a reduced pitch in said portions.