US PATENT SUBCLASS 305 / 130
.~.~ With frame-mounted rollers

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}
130.~.~ With frame-mounted rollers {1}
131  DF  .~.~.~> Adjustable or movable frame

DEFINITION

Classification: 305/130

With frame mounted rollers:

(under subclass 129) Apparatus wherein the holding means includes a plurality of cylindrical elements made of hard material and attached to the basic structural unit made of a plurality of beams, plates, or angle irons.

SEE OR SEARCH CLASS

180, Motor Vehicles,

9.52, for an adjustable track support mounted for vertical movement. [figure] [caption]A, B - Road wheels; C - Endless band; D - Frame; E, F, G, H, J, - Rollers