Device for force-opening doors

Details Device for force-opening doors Device for force-opening doors

1987-06-02

1988-11-08

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Fluid pressure

Vehicle attached

72705, 254104, 29239, B66F 300

Patent

active

047830530

ABSTRACT:
A device for force-opening doors, comprises an anchoring member including two sections relatively movable from a retracted position permitting the anchoring member to be applied between the doorframe posts on opposite sides of the door, to an extended position bringing the opposite ends of the anchoring member into firm engagement with the doorframe posts to firmly anchor the anchoring member transversely across the door; and a ram member carried by the anchoring member for engagement with the door when the anchoring member is anchored to the doorframe transversely across the door. The ram member includes a hydraulic device for producing a large force against the door to force-open it; and the anchoring member also includes a hydraulic device for moving the two sections of the anchoring member into firm engagement with the doorframe posts.

REFERENCES:
patent: 2512228 (1950-06-01), Fontaine
patent: 3625046 (1971-12-01), Van Gompel
patent: 3891187 (1975-06-01), Bearden
patent: 4270733 (1981-06-01), De Pue
patent: 4273311 (1981-06-01), Rio
patent: 4657225 (1987-04-01), Hoehn et al.
patent: 4660806 (1987-04-01), Masters

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