Hydraulic and pneumatic operative diaphragm valve

Details Hydraulic and pneumatic operative diaphragm valve Hydraulic and pneumatic operative diaphragm valve

2005-01-25

2005-01-25

Bastianelli, John (Department: 3754)

Valves and valve actuation

Fluid actuated or retarded

Fluid and non-fluid actuators

C251S028000, C251S041000, C251S046000, C251S295000

Reexamination Certificate

active

06845960

ABSTRACT:
Disclosed is a diaphragm valve. When a chamber is expanded by fluid supply into a pipe-shaped button, a valve stem is slightly moved upward by a rod and a shaft to open an outlet of an orifice. Fluid received in a space between a cap and a diaphragm and having a high pressure is discharged into an outlet-side space, whereby the diaphragm opens a guide conduit. When fluid is discharged from the pipe-shaped button, the diaphragm is moved toward the guide conduit, and the valve stem closes the outlet. The fluid in the inlet-side space has a high pressure, and the fluid in the space between the cap and diaphragm has a low pressure. The high pressure fluid flows toward the low pressure fluid through a pilot hole of the diaphragm. When fluid pressure balance is effected between the spaces, the diaphragm closes the guide conduit.

REFERENCES:
patent: 1241037 (1917-09-01), Sharp
patent: 1587516 (1926-06-01), Forfar
patent: 2053640 (1936-09-01), Sloan
patent: 3536294 (1970-10-01), Rodriguez
patent: 4052035 (1977-10-01), Kenny et al.
patent: 4630644 (1986-12-01), Hafner et al.
patent: 4809733 (1989-03-01), Hawkins
patent: 5029806 (1991-07-01), Huo-Lien et al.
patent: 9-316942 (1997-10-01), None
patent: 97-73495 (1997-12-01), None
patent: 10-0254905 (1997-12-01), None

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