Suck back valve

Details Suck back valve Suck back valve

1998-03-02

1999-08-17

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With cleaning means, drip collecting, waste disposal or soil...

Nozzle cleaner, flusher or drainer

239106, 222571, 251 635, 251331, B05B 1502

Patent

active

059381191

ABSTRACT:
A suck back valve is proposed which prevents change in the amount of fluid which is sucked by the suck back valve, and which improves response accuracy of a diaphragm, together with accurately controlling a displacement amount and a displacement speed thereof. A diaphragm displaceably disposed confronting an interior of a flow passage is formed from a first membrane and a second membrane stacked on the first membrane, wherein the first membrane is sucked into contact with the second membrane through holes defined in the second membrane, by activation of a negative pressure generating source which is connected to a chamber through a passage, and wherein the form of the first membrane is maintained by the second membrane.

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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