Normally open pneumatic air valve

Details Normally open pneumatic air valve Normally open pneumatic air valve

1987-10-19

1988-06-07

Michalsky, Gerald A.

Fluid handling

Larner-johnson type valves; i.e., telescoping internal valve...

251 612, 251 614, F16K 31126

Patent

active

047490004

ABSTRACT:
A normally open pneumatic air control valve includes an inlet section which defines a seating surface and a support grid. A support plate, located downstream of the inlet section, is itself supported by a plurality of rods extending from the inlet section. A damper assembly is disposed for movement axial of the inlet section and is supported for such movement between the inlet section support grid and the downstream support plate. The damper assembly is actuated by the admission of a pressurized gas to a chamber cooperatively defined by a housing fixed to the support plate and a diaphragm disposed therein. A spring acts on the fixed grid support of the inlet section and on the damper assembly to urge the damper assembly away from the inlet section so that the valve is biased to the open position.

REFERENCES:
patent: 2821343 (1958-01-01), Payne
patent: 2882008 (1959-04-01), Giauque
patent: 3432139 (1969-03-01), Jentoft
patent: 3974859 (1976-08-01), McNabney
patent: 4082114 (1978-04-01), Hantke et al.
patent: 4177970 (1979-11-01), Ring, Jr.
patent: 4305418 (1981-12-01), Jensen et al.

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