US PATENT SUBCLASS 305 / 129
.~ With roller support contacting lower track run

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.~ With roller support contacting lower track run {9}
130  DF  .~.~> With frame-mounted rollers {1}
132  DF  .~.~> With roller support mounted for movement individually or in pairs {2}
135  DF  .~.~> With high drive arrangement
136  DF  .~.~> Specific roller structure, per se {1}
138  DF  .~.~> With roller mounting means
139  DF  .~.~> With intermediate upper track run support
140  DF  .~.~> With endless roller chain support
141  DF  .~.~> With vertically movable wheel support
142  DF  .~.~> With plural wheel support

DEFINITION

Classification: 305/129

With roller support contacting lower track run:

(under subclass 124) Apparatus including a holding means consisting of at least one cylindrical element engaging the bottom portion of the endless band.