US PATENT SUBCLASS 411 / 291
.~.~.~.~.~ Having at least one region formed by a cut, slot, etc., across at least one sidewall of the element and extending generally radially into the 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}
259  DF  .~ Comprising a thread lock {18}
276  DF  .~.~ Having the internally threaded element distorted {2}
285  DF  .~.~.~ Axial distortion {4}
290  DF  .~.~.~.~ Including a region displaceable generally axially relative to another part of the element {1}
291.~.~.~.~.~ Having at least one region formed by a cut, slot, etc., across at least one sidewall of the element and extending generally radially into the element

DEFINITION

Classification: 411/291

Having at least one region formed by a cut, slot, etc., across at least one sidewall of the element and extending generally radially into the element:

(under subclass 290) Device wherein at least one shiftable region is created by forming a generally planar void (e.g., by a saw cut, by a preformed lip, etc.) which starts in one or more of the sidewalls and extends into and part way through the element in a direction more or less normally to the longitudinal axis of the element.

(1) Note. While the art of this subclass emphasizes the binding action which results from the threads of the region being moved axially relative to the threads of another part of the element, it is occasionally disclosed that this movement (ordinarily by bending) results in the threads of the region presenting an other-than-exactly-circular opening for receiving the threads of the bolt.