Fluid sprinkling – spraying – and diffusing – With selectively preset flow cutoff or initiating means – By rate of flow or volume means
Patent
1974-05-06
1977-05-10
Schwadron, Martin P.
Fluid sprinkling, spraying, and diffusing
With selectively preset flow cutoff or initiating means
By rate of flow or volume means
239562, 137244, 251 38, 251 45, F16K 2106
Patent
active
040223809
ABSTRACT:
Flushing valves of the type having a control chamber with a movable wall are disclosed, the chamber being partially emptied to cause the main valve surface and seat to separate and open the valve, and being slowly refilled to close the valve. A cleaning needle is provided which moves in the restricted inlet to the chamber to remove dirt and scale therefrom. In one form, the valve actuating element sequentially lifts a valve closure element, to which the needle is secured, from a seat to open said outlet and thereafter acts on the movable wall part to cause a reduction in the volume of said chamber and force some of its contents through the open outlet. In a further form, the actuating element pressurizes the chamber by forcing the movable wall in the direction which reduces the volume thereof. The increased pressure forces a flexible wall part of the chamber from a sealing surface to allow liquid to flow from the chamber.
REFERENCES:
patent: 1295250 (1919-02-01), Yeiser
patent: 1711234 (1929-04-01), Langdon
patent: 2181581 (1939-11-01), Fraser
patent: 2833300 (1958-05-01), Sirotek
Gerard Richard
Schwadron Martin P.
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