US PATENT SUBCLASS 104 / 155
.~ Pneumatic


Current as of: June, 1999
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104 /   HD   RAILWAYS

287  DF  CAR-CARRIED PROPULSION SYSTEM {3}
155.~ Pneumatic {3}
156  DF  .~.~> Piston tube
157  DF  .~.~> Motor charging {1}
161  DF  .~.~> Sealing slot closers


DEFINITION

Classification: 104/155

(under subclass 287) Car-propulsion systems in which the power is pneumatic and propulsion is effected through the cooperation of the car-carried mechanism and mechanism located along the trackway and not otherwise classified below.

SEE OR SEARCH CLASS

406, Conveyors: Fluid Current, for propulsion of carriers through tubes by means of a current of air flowing through the tube. Class 104 provides for similar subject matter having tracks on which the carriers ride through the tubes.