US PATENT SUBCLASS 305 / 145
.~ Having hydraulic adjusting means

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

143  DF  WITH MEANS FOR TENSIONING TRACK BY MOVING AT LEAST ONE ENDWHEEL {7}
145.~ Having hydraulic adjusting means {3}
146  DF  .~.~> Including spring device (e.g., coil spring) {1}
148  DF  .~.~> Including gas recoil
149  DF  .~.~> With vent or relief valve

DEFINITION

Classification: 305/145

Having hydraulic adjusting means:

(under subclass 143) Apparatus wherein the means for tensioning track is operated by use of a fluid in a spring mechanism to actuate a correcting movement in response to changes in the tension of the track.

SEE OR SEARCH CLASS

92, Expansible Chamber Devices,

129, for an abutment connection working member and the power transmission device.

180, Motor Vehicles,

9.52, for an additional track support mounted for vertical movement.

474, Endless Belt Power Transmission Systems or Components, 110, for a tension adjuster driven by a fluid motor.