US PATENT SUBCLASS 104 / 290
.~.~ Linear motor

Current as of: June, 1999
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104 /   HD   RAILWAYS

287  DF  CAR-CARRIED PROPULSION SYSTEM {3}
288  DF  .~ Electric {3}
290.~.~ Linear motor {4}
291  DF  .~.~.~> Suspension between truck and vehicle body
292  DF  .~.~.~> Propulsion by active guideway; e.g., linear synchronous motor, etc.
293  DF  .~.~.~> Including means to control gap
294  DF  .~.~.~> Construction or composition of motor elements

DEFINITION

Classification: 104/290

Linear motor:

(under subclass 288) Apparatus wherein either a primary or secondary motor element of a linear induction motor is carried by the vehicle, and the other is formed or adjacent on the guideway to mutually propel the vehicle along the

guideway.

SEE OR SEARCH THIS CLASS, SUBCLASS:

282, for linear motors which, in addition to propelling the vehicle, are also employed to suspend it above the guideway.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure,

12+, for a linear motor, per se. Patents disclosing a linear motor for use with a railway system and positively claiming either a vehicle carrying one of the linear motor elements or track structure in addition to a motor element are properly classified in Class 104.

318, Electricity: Motive Power Systems, 38, 135 and 687 for linear motors in combination with an electrical system. Patents disclosing a linear motor and associated control system for use with a railway system, and claiming in addition to the combination either a vehicle or track structure in addition to a motor element are properly classified in Class 104.