US PATENT SUBCLASS 301 / 41.1
.~ Traction increasing

Current as of: June, 1999
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301 /   HD   LAND VEHICLES: WHEELS AND AXLES

5.1  DF  WHEEL {21}
41.1.~ Traction increasing {5}
42  DF  .~.~> Chains
43  DF  .~.~> Projecting cleat {2}
52  DF  .~.~> Dual rims, connecting cleat
53  DF  .~.~> Recessions in rim
53.5  DF  .~.~> Wheel weight

DEFINITION

Classification: 301/41.1

Traction increasing:

(under subclass 5.1) Wheel including provision for increasing

the tractive effort thereof or for preventing slipping (or sluing) of the wheel from its intended direction of travel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

40.1, for an emergency wheel with traction-increasing provision.