US PATENT SUBCLASS 49 / 134
.~.~.~ Treadle on opposite approaches


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  DF  .~.~ Actuation raises closure to blocking position {1}
134.~.~.~ Treadle on opposite approaches


DEFINITION

Classification: 49/134

(under subclass 133) Device which include either (1) two separate closures on opposite sides of a crossing, each actuated by a treadle, or (2) a closure having a treadle operator on each approach so as to be actuated if approached from either end.

SEE OR SEARCH THIS CLASS, SUBCLASS:

93, for closures on opposite approaches to a crossing interconnected to move concurrently.