Movable or removable closures – Swinging closures closing single opening
Patent
1979-05-15
1980-11-25
Kannan, Philip C.
Movable or removable closures
Swinging closures closing single opening
49199, 49206, 49386, 296 56, E05D 700
Patent
active
042350476
ABSTRACT:
The armored door of a field artillery ammunition support vehicle has a door opener on each side of the door, the door being hinged at the top to the top of the vehicle for movement into raised substantially horizontal position to supply added protection for crew members. Each door opener includes a cylinder pivoted at its bottom to the floor of the vehicle with a rod actuated compression spring in the cylinder. The upper end of the rod is pivoted to the end of an arm and the arm is in turn pivoted to an extension from the door opening into the vehicle body. The other end of the arm is pivoted to a link which in turn is pivoted at its other end to the interior of the door. On opening of the door the spring which is compressed assists in raising the weight of the door and on closing of the door the spring compresses countering the downward action of the weight of the door. In door close position the four pivots are aligned on the axis of the cylinder and rod to assist in holding the door in closed position. The door may be provided with conventional manually actuable locking means and be extended at its bottom by a pair of doors hinged to the vehicle body on vertical axes for lateral outward movement for further protection of the crew and ship-lap joints are provided between the doors for waterproofness.
REFERENCES:
patent: 2698173 (1954-12-01), Rydell
patent: 2711343 (1955-06-01), Falk et al.
patent: 2808625 (1957-10-01), Wilkinson
patent: 3815950 (1974-06-01), McKenzie et al.
patent: 4094158 (1978-06-01), Levere et al.
Harsco Corporation
Kannan Philip C.
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