US PATENT SUBCLASS 49 / 133
.~.~ Actuation raises closure to blocking position

Current as of: June, 1999
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49 /   HD   MOVABLE OR REMOVABLE CLOSURES

131  DF  CLOSURE SURFACE MOVED TO INOPERATIVE POSITION FLUSH-WITH-GROUND {1}
132  DF  .~ Treadle actuated {1}
133.~.~ Actuation raises closure to blocking position {1}
134  DF  .~.~.~> Treadle on opposite approaches

DEFINITION

Classification: 49/133

(under subclass 132) Device wherein actuation of the treadle moves the closure from an inoperative flush position to an elevated passage blocking position, usually closures extending between or across the rails of a railroad track to prevent cattle from straying up or down the track.