US PATENT SUBCLASS 411 / 139
.~.~.~ Laterally introduced key locks looplike element to 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}
139.~.~.~ Laterally introduced key locks looplike element to surface

DEFINITION

Classification: 411/139

Laterally introduced key locks looplike element to surface:

(under subclass 136) Device wherein an element of the member is a pin, rod, wedge, etc., which is inserted between, by movement toward and more or less at right angles to the axis of the bolt, the confronting regions of the looplike element and the inwardly facing surface of the bolt head or nut, the element penetrating, at least to some extent, each confronting region and serving to key the looplike element and the bolt head, or the nut, to one another.

(1) Note. Frequently, both confronting regions are provided with a groove, recess, etc., for receiving the element; in the event, however, that only one region has such a groove, etc., then it is customary to utilize the element to cut (e.g., by providing it with a sharpened edge) or otherwise form a channel, notch, etc., for its reception in the other region.