Movable or removable closures – Mounted for optional movements – One closure movable separately from or with other closure
Patent
1976-07-16
1977-09-20
Wayner, William E.
Movable or removable closures
Mounted for optional movements
One closure movable separately from or with other closure
98 87, E06B 728
Patent
active
040487563
ABSTRACT:
An air relief mechanism for use in an opening in a storm door disposed in hinged relationship in the outer side of a casing around a door opening containing an inner door disposed in hinged relationship within the casing. An inner frame is secured to the inside surface of the storm door and engages the periphery of said opening. A screen is disposed in said frame and fills said opening. An outer frame is secured to the outside surface of the storm door and engages said opening, said frame having a slot disposed outside the storm door. A flap is pivotally disposed in said outer frame, said flap being biased into a normal first position at which said opening and said slot are isolated from each other, said flap responding to an air pressure differential developed when one of said doors is moved from open to closed position while the other door is in the closed position to momentarily assume a second position at which said opening and said slot communicate with each other and said differential is quickly reduced to zero.
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patent: 2820475 (1958-01-01), Hobbs
patent: 2871523 (1953-02-01), Negoro
Charvat Robert
Raymond Lee Organization Inc.
Wayner William E.
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