US PATENT SUBCLASS 152 / 247
.~.~ Metallic springs

Current as of: June, 1999
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152 /   HD   RESILIENT TIRES AND WHEELS

151  DF  TIRES, RESILIENT {14}
246  DF  .~ Cushion {4}
247.~.~ Metallic springs {4}
248  DF  .~.~.~> Tubular {2}
251  DF  .~.~.~> Wheel encircling band {2}
270  DF  .~.~.~> Leaf {2}
284  DF  .~.~.~> Coil {2}

DEFINITION

Classification: 152/247

The tire cushions the wheel by means of metallic springs. Such springs may be combined with rubber.

(1) Note. For combined pneumatic and metallic spring tires, see this class, subclass 156.