US PATENT SUBCLASS 411 / 145
.~.~.~.~ Formations comprise ramplike teeth, means comprises a movable pawl

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

81  DF  THREADED FASTENER LOCKED TO A DISCREET STRUCTURE (E.G., PLATE, RAIL, WHEEL) {13}
132  DF  .~ Lock washer-type member located between substructure and bolt head or nut {8}
143  DF  .~.~ Formations on either member or surface, and cooperative, restricting means on the other {1}
144  DF  .~.~.~ Formations on surface, means on member, one of which presents a sharp-edged configuration {1}
145.~.~.~.~ Formations comprise ramplike teeth, means comprises a movable pawl {1}
146  DF  .~.~.~.~.~> And substructure accommodation for member portion

DEFINITION

Classification: 411/145

Formations comprise ramplike teeth, means comprises a movable pawl:

(under subclass 144) Device wherein the formations on the inwardly facing surfaces of the bolt head or the nut are in the nature of successive teeth, each having a configuration consisting of an incline, followed by a decline, the latter usually being a sharp (e.g., a straight) drop, and wherein the means on the member, which means is movable in response to a force applied thereto in a particular direction by a moving tooth, may comprise (a) a protruding portion of the member, which portion either is in itself resilient or else is resilient by virtue of the nature (e.g., the material) of the member, or (b) an attachment to the member which is movable (e.g., pivotally) relative to the member.

(1) Note. Exemplary of (a) above is a split washer having one of its free ends positioned to engage the teeth, which free end frequently is distorted or otherwise reshaped into a lip-like configuration.