US PATENT SUBCLASS 152 / 21
.~.~ Lateral thrust or tension

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}
21.~.~ Lateral thrust or tension {3}
22  DF  .~.~.~> Combined spring and friction {1}
25  DF  .~.~.~> With coil springs {1}
27  DF  .~.~.~> With balls

DEFINITION

Classification: 152/21

The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by mechanism wherein thrust or tension is

applied to the springs laterally of the wheel.