US PATENT SUBCLASS 105 / 426
.~ Trapdoors


Current as of: June, 1999
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105 /   HD   RAILWAY ROLLING STOCK

425  DF  PLATFORMS {2}
426.~ Trapdoors {6}
427  DF  .~.~> Operated with gate and step
428  DF  .~.~> Diagonal sectional
429  DF  .~.~> With gate
430  DF  .~.~> With steps {1}
432  DF  .~.~> Actuators {2}
435  DF  .~.~> Locks and starters


DEFINITION

Classification: 105/426

(under subclass 425) Platforms having horizontal trap doors or closures over car steps.