Hydraulic door opening/closing and locking/unlocking apparatus

Details Hydraulic door opening/closing and locking/unlocking apparatus Hydraulic door opening/closing and locking/unlocking apparatus

1980-12-08

1982-12-07

Kannan, Philip C.

Movable or removable closures

Operator interrelated with closure latch release

Motor driven

49281, E05F 1500

Patent

active

043619851

ABSTRACT:
A hydraulically operated tailgate door which is pivotally hinged to move in an arc about the door hinge until the door is substantially vertical in position adjacent the door frame. Means are provided to enable the door to be moved substantially parallel to the door frame during movement from the closed position to a locked position. The same hydraulic cylinders provided for raising and lowering the door are also utilized for locking and unlocking the door.

REFERENCES:
patent: 3440763 (1969-04-01), O'Brien
patent: 3440764 (1969-04-01), Cover
patent: 3757969 (1973-09-01), Smith
patent: 3860288 (1975-01-01), Martin et al.
patent: 3873149 (1975-03-01), Churchman

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