US PATENT SUBCLASS 301 / 45
.~.~.~ Movable

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

5.1  DF  WHEEL {21}
41.1  DF  .~ Traction increasing {5}
43  DF  .~.~ Projecting cleat {2}
45.~.~.~ Movable {2}
46  DF  .~.~.~.~> Adjustable {3}
51  DF  .~.~.~.~> Spring moved

DEFINITION

Classification: 301/45

(under subclass 43) Wheel in which the cleat is movable with respect to its support for any purpose.

SEE OR SEARCH CLASS

172, Earth Working,

545, for a rolling earth working tool with movable blades or teeth.

305, Wheel Substitutes for Land Vehicles,

4+, for a ground-engaging element movably secured to the rim of a wheel in the form of a stepper. Class 305 takes a device in the form of a plate pivotally secured to the rim of a wheel and adapted to extend in a plane parallel to the ground when in contact therewith to simulate the action of a foot even though the plate is provided with a ground-engaging cleat. The device of Class 305 is distinguished from that of Class 301, subclasses 45+ in that the traction-increasing

device of Class 301 comprises a ground-engaging cleat which may be movably mounted on the rim of a wheel; the plate of Class 305 is adapted to simulate the action of a foot when in contact with the ground.