US PATENT SUBCLASS 49 / 119
.~.~ Counterbalance effect derived from opposed closure

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

73.1  DF  CLOSURES INTERCONNECTED FOR CONCURRENT MOVEMENT {9}
116  DF  .~ Opposed similar movement {5}
119.~.~ Counterbalance effect derived from opposed closure {2}
120  DF  .~.~.~> Bipartite, center-opening type; e.g., elevator door
121  DF  .~.~.~> Cable interconnected

DEFINITION

Classification: 49/119

(under subclass 116) Device wherein the weight of one closure assists in balancing the weight of another closure moving in a reverse direction, i.e., opposed vertical movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5+, for counterbalanced, interconnected closures with a fusible connection therebetween.

98+, for counterbalanced opposed closures with means to permit independent movement.