US PATENT SUBCLASS 152 / 102
.~.~.~.~.~ Double acting

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}
87  DF  .~.~ Coil spring {7}
97  DF  .~.~.~ Radial {6}
100  DF  .~.~.~.~ Cylinder and piston supported {2}
102.~.~.~.~.~ Double acting

DEFINITION

Classification: 152/102

In a spring wheel with cylinder and piston supported radial coil springs supporting a spring encircling rigid annulus the construction and arrangement is such that each spring acts both in compression and tension. In another species included in this subclass the springs are limited to compression or tension but act whether the local space between the rigid annulus and the wheel center is increased or decreased, that is, they act whether at the temporary top or bottom of the wheel.

(1) Note. Compare this class, subclass 98.