US PATENT SUBCLASS 246 / 304
.~.~.~ Vehicle-restrained gates and doors

Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

270 R  DF  VEHICLE-ENERGY ACTUATION {11}
292  DF  .~ Signals and gates, automatic {2}
297  DF  .~.~ Track mechanism {7}
304.~.~.~ Vehicle-restrained gates and doors {3}
305  DF  .~.~.~.~> Parallel swing
306  DF  .~.~.~.~> Longitudinal motion
307  DF  .~.~.~.~> Vertical motion {1}

DEFINITION

Classification: 246/304

(under subclass 297) Subject matter including a gate or door which is held against gravity or a spring by contact with the moving vehicle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

281, 315 and 398, for vehicle-restrained mechanism.

397, for hand-restrained mechanism.