US PATENT SUBCLASS 152 / 55
.~.~.~ Cylinder and piston

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}
53  DF  .~.~ Pneumatic spring {3}
55.~.~.~ Cylinder and piston

DEFINITION

Classification: 152/55

The pneumatic springs supporting the spring encircling rigid annulus in the spring wheel each consists of a cylinder and piston wherein air in the cylinder cushions the piston against telescoping action.