US PATENT SUBCLASS 411 / 150
.~.~.~.~ Having one washer, or washer part, of a more yieldable nature than another washer, or part

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  DF  .~.~.~ Plural, axially adjacent washers, or plural part washer {1}
150.~.~.~.~ Having one washer, or washer part, of a more yieldable nature than another washer, or part

DEFINITION

Classification: 411/150

Having one washer, or washer part, of a more yieldable nature than another washer, or part:

(under subclass 149) Device wherein either one of the two or more open-center figures, or one of the two or more different components, parts, substances, etc., of a single such figure, is, by composition or configuration, more bendable, compressible, etc., than another of the figures or another of the components, etc., of the single figure.