Pilot operated low pressure shut off valve

Details Pilot operated low pressure shut off valve Pilot operated low pressure shut off valve

1999-04-19

2000-11-28

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

With separate connected fluid reactor surface

5713, F16K 31126

Patent

active

061521698

ABSTRACT:
The present invention relates to a pilot operated low pressure shut off valve. The valve is used within a mattress unit and has an air inlet, an air chamber, an air outlet, a pressure inlet, an adjustable pressure chamber, and a movable shank. The air inlet receives and directs pressurized air into an air chamber. The air chamber directs the pressurized air into the mattress unit when the movable shank opens the air outlet. The movable shank opens the air outlet when (1) the pressure inlet receives and directs a portion of the pressurized air toward an adjustable pressure chamber and (2) the pressurized air is at or above a first predetermined air pressure. When these two conditions are met, the pressurized air enters the adjustable pressure chamber which results in the movable shank moving which in turn opens the air outlet to allow the pressurized air to enter the mattress unit.

REFERENCES:
patent: 2748797 (1956-06-01), Heizer et al.
patent: 3659625 (1972-05-01), Colner et al.
patent: 4986738 (1991-01-01), Kawasaki et al.
patent: 5944066 (1999-08-01), Viard

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