Suck back valve

Fluid sprinkling – spraying – and diffusing – With cleaning means – drip collecting – waste disposal or soil... – Nozzle cleaner – flusher or drainer

Patent

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Details

239106, 222571, 251 635, 251331, B05B 1502

Patent

active

059674148

ABSTRACT:
A suck back valve includes a fitting having a fluid passage formed with a first port at one end thereof and a second port at another end, a valve actuator having a suck back mechanism for sucking a fluid from inside the fluid passage according to a negative pressure action of a diaphragm displaced by a pilot pressure, and first and second electromagnetic valves which increase/reduce the pilot pressure supplied to a diaphragm chamber in accordance with supply and discharge actions. A controller is provided for energizing and deenergizing the first and second electromagnetic valves, wherein said fitting, said actuator and said controller are assembled together as an integral unit.

REFERENCES:
patent: 3895748 (1975-07-01), Klingenberg
patent: 4394945 (1983-07-01), Taylor, Jr.
patent: 4597719 (1986-07-01), Tano
patent: 5134962 (1992-08-01), Amada et al.
patent: 5386849 (1995-02-01), Gilchrist et al.
patent: 5423482 (1995-06-01), Mueller et al.

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