US PATENT SUBCLASS 411 / 149
.~.~.~ Plural, axially adjacent washers, or plural part washer

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}
147  DF  .~.~ Member comprises washer formed as closed loop or apertured plate or as split ring {8}
149.~.~.~ Plural, axially adjacent washers, or plural part washer {1}
150  DF  .~.~.~.~> Having one washer, or washer part, of a more yieldable nature than another washer, or part

DEFINITION

Classification: 411/149

Plural, axially adjacent washers, or plural part washer:

(under subclass 147) Device wherein there are either (a) two or more open-center figures located next to one another along the axis of the bolt or nut, or (b) a single open-center figure which is made up of two or more different components, parts, substances, etc.

(1) Note. Included herein is a device of the kind wherein an open-center figure is formed in each of the two ends of a strip of material and the strip then folded about the mid portion of its length to place the figures in axial alignment.

(2) Note. In the instance of the single, composite figure, the several components, parts, substances, etc., usually are readily discernible as such, even though they may be rather intimately associated with one another.