US PATENT SUBCLASS 152 / 44
.~.~.~ Blocks or balls

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}
40  DF  .~.~ Rubber spring {4}
44.~.~.~ Blocks or balls {1}
45  DF  .~.~.~.~> With drive {1}

DEFINITION

Classification: 152/44

The rubber springs supporting the spring encircling rigid annulus in the spring wheel consist of individual rubber blocks or balls as distinguished from sheets, cords or annular formations.