US PATENT SUBCLASS 280 / 47.22
.~.~.~.~ Spring suspension

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

29  DF  WHEELED {21}
47.131  DF  .~ Tiltable vehicles, stabilized by attendant or article {6}
47.17  DF  .~.~ Handle-propelled vehicles {8}
47.21  DF  .~.~.~ With shiftable main axle support {1}
47.22.~.~.~.~ Spring suspension

DEFINITION

Classification: 280/47.22

(under subclass 47.21) Vehicles in which relative shifting of

the axle or axles occurs because of the presence of a spring.

SEE OR SEARCH THIS CLASS, SUBCLASS:

65+, 79 and 87.03, for similar springing between wheel or wheels and the load-support.