US PATENT SUBCLASS 305 / 139
.~.~ With intermediate upper track run support

Current as of: June, 1999
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305 /   HD   WHEEL SUBSTITUTES FOR LAND VEHICLES

124  DF  WITH TRACK SUPPORT INTERMEDIATE OF END WHEELS {4}
129  DF  .~ With roller support contacting lower track run {9}
139.~.~ With intermediate upper track run support

DEFINITION

Classification: 305/139

With intermediate upper track run support:

(under subclass 129) Apparatus including holding means at the middle place of the top portion of the endless band.

SEE OR SEARCH CLASS

180, Motor Vehicles,

906, for adjustable axles. [figure] [caption]A - Endless track; B-F - Constitutes intermediate upper track run support.; G - Sprocket wheel; H - Idler sprocket wheel; J - Truck frame; K - Rollers