US PATENT SUBCLASS 411 / 138
.~.~.~ Pawl element, movably carried by looplike element, coacts with ratchet on surface

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}
136  DF  .~.~ Member comprises looplike element (e.g., washer) interlocked with additional element, one of them engaging substructure or surface in other than planar, face-to-face contact {3}
138.~.~.~ Pawl element, movably carried by looplike element, coacts with ratchet on surface

DEFINITION

Classification: 411/138

Pawl element, movably carried by looplike element, coacts with ratchet on surface:

(under subclass 136) Device wherein the looplike element, or one of a plurality thereof, mounts, supports or otherwise holds another element which includes a portion for engaging the inwardly facing surface of the bolt head or nut, which portion is capable of some degree of movement relative to the surface, and wherein the surface has at least one, and usually a plurality of, steps or related formations, which formations constitute a ratchet, whereby the movable portion of the other element serves as a pawl for engaging the ratchet and restricting the rotation, in at least one direction, of the bolt or nut.