Fluid controller with diaphragm and piston

Details Fluid controller with diaphragm and piston Fluid controller with diaphragm and piston

1981-11-06

1984-01-10

Weakley, Harold

Motors: expansible chamber type

With motive fluid valve

Valved piston

91509, 92 86, 92 98D, 1371165, 13750511, 137510, 251 615, 251 636, F15B 1108

Patent

active

044247389

ABSTRACT:
A fluid flow controller comprises a casing and includes a valve that is actuatable by either a diaphragm or a piston. Diaphragm actuation is provided by a diaphragm held by a retainer, the retainer being axially moveable within the casing in response to fluid pressure on the diaphragm. Piston actuation is provided by (i) the retainer and (ii) sealing means at the periphery of the retainer for providing fluid tight engagement between the casing and the retainer. With either diaphragm or piston actuation, even if the diaphragm ruptures, substantially no fluid can bypass the retainer, and the flow controller continues to function. A relief valve prevents rupture of the diaphragm if the fluid pressure exceeds a predetermined valve.

REFERENCES:
patent: 3115068 (1963-12-01), Lofink
patent: 3294114 (1966-12-01), Birkemeier
patent: 3646854 (1972-03-01), Bradley

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