Door actuating mechanism us2800323a en 1951 10 02.
Pneumatic door lock.
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Get it as soon as fri aug 28.
Ideal security sk1730w sk1730 pneumatic heavy storm door closer white.
Means for manually producing overpressure are rigidly connected to a door.
4 4 out of 5 stars 280.
Door operation and control us2733918a en 1956 02 07.
Cell doors corridors or entrances emergency exit doors.
Us2778632a en 1955 02 28.
The pneumatic closer has a full 90 opening range and has an adjustable closing speed.
Pittsburgh plate glass co.
Vehicle door lock us2710186a en 1948 07 21.
The invention concerns a lock for doors or operationally similar structures the lock mechanism being manually actuated with the aid of pneumatic means without the need for external energy.
Use a single closer for light to medium weighted doors or a pair one on top and one at the bottom for heavier full view storm and screen doors.
More buying choices 35 97 3 new offers.
United states patent 6106032.
4 5 out of 5 stars 290.
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