US PATENT SUBCLASS 152 / 107
.~.~.~.~.~.~ 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  DF  .~.~ Coil spring {7}
97  DF  .~.~.~ Radial {6}
105  DF  .~.~.~.~ With separate annulus guide {1}
106  DF  .~.~.~.~.~ Combined drive {5}
107.~.~.~.~.~.~ Spring

DEFINITION

Classification: 152/107

In a spring wheel having a spring encircling rigid annulus supported by radial coil springs, with guide means and combined drive, the drive is cushioned.

(1) Note. For radial coil springs in combination with differently arranged coil springs which act as both support and drive springs, see this class, subclasses 89 and 90.

(2) Note. For radial coil springs in combination with springs of different type which act as both support and drive springs, see this class, subclasses 32, 35 and 37-39.

(3) Note. For tangential coil springs which act as both support and drive springs, see this class, subclass 93.

(4) Note. For circumferential coil springs which act as both support and drive springs, see this class, subclass 92.