US PATENT SUBCLASS 305 / 140
.~.~ With endless roller chain 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}
140.~.~ With endless roller chain support

DEFINITION

Classification: 305/140

With endless roller chain support:

(under subclass 129) Apparatus wherein the holding means includes a frame as a continuous band made of individual links and further provided with cylindrical elements trained to run around the frame to extend between the frame and the lower run of the track. [figure] [caption]A - Axle hung rocker beam; B - Runner blocks; C - Roller chain; D - Track lugs; E, F - Sprocket wheels