US PATENT SUBCLASS 152 / 30
.~.~.~ Rubber and pneumatic

Current as of: June, 1999
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152 /   HD   RESILIENT TIRES AND WHEELS

1  DF  SPRING WHEELS {3}
17  DF  .~ Spring encircling rigid annulus {10}
29  DF  .~.~ With plural spring types {6}
30.~.~.~ Rubber and pneumatic

DEFINITION

Classification: 152/30

In a spring wheel having a spring encircling rigid annulus supported by plural spring types, said types are limited to rubber and pneumatic springs.