Movable or removable closures – Removable closure – Releasable means on closure
Patent
1977-07-21
1978-08-22
Kannan, Philip C.
Movable or removable closures
Removable closure
Releasable means on closure
202248, E05C 2102
Patent
active
041078799
ABSTRACT:
A door is of the type wherein the weight of the door causes locking thereof against a door frame. The door frame is of the type having extending outwardly therefrom vertically spaced pairs of support hooks for supporting the door. The door includes a door element adapted to be sealed against the door frame. A pair of vertically spaced horizontally extending locking bars are carried by the door element. Each locking bar has opposite round ends adapted to rest on and be held by a respective pair of support hooks. A pair of locking support members, one each associated with a respective locking bar, are mounted for vertical sliding movement along the door element. Each locking bar is pivotally connected to the respective locking support member about a respective horizontal axis such that upon positioning the locking bars on the respective hooks, the weight of the door will cause the locking bars to pivot about the respective pivot axes in directions away from the door element. The door is thereby pressed away from the hooks and toward the door frame. An equalizer assembly is rotatably mounted on the door element and connected to both of the locking support members for equalizing the relative positions of the locking bars with respect to the hooks upon initial positioning of the locking bars on the hooks, by allowing relative movement of the locking support members along the door element in vertical directions toward or away from each other. First rollers mounted on the locking support members for rotation about axes extending parallel to the door element and second rollers mounted on the locking support members for rotation about axes perpendicular to the door element guide the vertical movement of the locking support members. Needle bearings are provided on the opposite ends of the locking bars to prevent friction between the locking bars and the hooks.
REFERENCES:
patent: 1780992 (1930-11-01), Beckers
patent: 2759884 (1956-08-01), Gillott
patent: 3486986 (1969-12-01), Freund
patent: 3510404 (1970-05-01), Freund
patent: 3630853 (1971-12-01), Grumm
Didier Engineering GmbH.
Kannan Philip C.
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