US PATENT SUBCLASS 305 / 133
.~.~.~ Including individual roller mounted for movement at end of arm

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}
132  DF  .~.~ With roller support mounted for movement individually or in pairs {2}
133.~.~.~ Including individual roller mounted for movement at end of arm

DEFINITION

Classification: 305/133

Including individual roller mounted for movement at end of arm:

(under subclass 132) Apparatus wherein the singular cylindrical element is positioned for rotational movement at the end of a pivotable elongate member.

SEE OR SEARCH CLASS

180, Motor Vehicles,

9.58, for a track support mounted for vertical movement having a leaf, torsion, or coil spring.

280, Land Vehicles,

685, for a tandem axle equalizing frame with a coil or leaf spring suspension. [figure] [caption]A - Vehicle body; B - Tension device; C - Front roller wheel; D - Rear roller wheel; E - Endless track; F - Track link; G - Link pin; H - Forward arm; J - Rearward arm