Method and apparatus for force-opening doors

Details Method and apparatus for force-opening doors Method and apparatus for force-opening doors

1996-06-26

1998-06-23

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Fluid pressure

Vehicle attached

29239, 254 1, B66F 300

Patent

active

057693943

ABSTRACT:
A method and apparatus for force-opening doors, particularly effective with respect to steel doors and other types of solidly built doors. In a preferred embodiment, an anchoring unit carrying a ram unit having a ram member is aligned with a side of a door frame. The anchoring unit is anchored to the door by moving a pair of clamping members towards each other into clamping engagement with the opposite sides of the door. The clamping members are moved towards each other by a force-multiplying device, preferably a hydraulic device. Once anchored to the door, the ram member is driven outwardly of the ram unit by a force-multiplying device, against the side of the door frame to force-open the door. The ram unit includes an abutting member positionable to abut against the inside face of the door facing the ram unit, to assist in force-opening the door when the ram member is driven against the door frame.

REFERENCES:
patent: 3973315 (1996-08-01), Thanghe
patent: 4783050 (1988-11-01), Yirmiyahu et al.

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