US PATENT SUBCLASS 280 / 137.502
.~.~.~ Fifth-wheel or pivot details

Current as of: June, 1999
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280 /   HD   LAND VEHICLES

29  DF  WHEELED {21}
80.1  DF  .~ Running gear {20}
137.5  DF  .~.~ Turnable axle (e.g., fifth-wheel or swinging axle) {2}
137.502.~.~.~ Fifth-wheel or pivot details {5}
137.503  DF  .~.~.~.~> Spherical union (i.e., ball and socket joint)
137.504  DF  .~.~.~.~> Perch or reach bracing
137.505  DF  .~.~.~.~> Offset pivot
137.506  DF  .~.~.~.~> Kingbolt detail
137.507  DF  .~.~.~.~> Antirattler

DEFINITION

Classification: 280/137.502

Fifth-wheel or pivot details:

(under subclass 137.5) Subject matter wherein significance is attributed to the (a) the fifth-wheel or (b) the vertical pivot.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124.115, for a horizontal rocking and vertically swinging axle including a fifth-wheel coupling creating the vertical pivot axis.

124.124, for a swinging axle wherein a fifth wheel is positioned upon a transverse leaf spring.

137.501, for a fifth wheel or swinging axle including means for connection to a source of pulling force. See the search notes thereunder for additional relevant subclasses.

433+, for a fifth wheel coupling between a tractor and a semitrailer.