US PATENT SUBCLASS 152 / 87
.~.~ Coil spring

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.~.~ Coil spring {7}
88  DF  .~.~.~> Link connected
89  DF  .~.~.~> Variously arranged {1}
91  DF  .~.~.~> Diagonal
92  DF  .~.~.~> Circumferential
93  DF  .~.~.~> Tangential
94  DF  .~.~.~> Transverse {2}
97  DF  .~.~.~> Radial {6}

DEFINITION

Classification: 152/87

The spring encircling rigid annulus in the spring wheel is resiliently supported against radial motion relative to the wheel center by coil springs. The term "coil" is used to include coil, helical and volute springs.