US PATENT SUBCLASS 180 / 190
.~.~ Endless track type element

Current as of: June, 1999
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180 /   HD   MOTOR VEHICLES

182  DF  INCLUDING ONE OR MORE SKI-LIKE OR RUNNER MEMBERS {2}
186  DF  .~ With at least one surface-engaging propulsion element {6}
190.~.~ Endless track type element {3}
191  DF  .~.~.~> Protruding from member
192  DF  .~.~.~> Plural tracks with interconnected drive or support means
193  DF  .~.~.~> With vertically movable track support located intermediate the forward and rearward extremities of the track

DEFINITION

Classification: 180/190

Endless track type element:

(under subclass 186) Vehicle wherein at least one propulsion element comprises an endless belt or chain in direct engagement with the supporting surface, and which belt or chain travels in a path having a forward extremity determined by one track driving or guiding wheel and a rearward extremity determined by another such wheel (i.e., the end wheels).