Fluid handling – Line condition change responsive valves – Pilot or servo controlled
Patent
1994-10-31
1996-04-30
Hepperle, Stephen M.
Fluid handling
Line condition change responsive valves
Pilot or servo controlled
251 88, F16K 31385
Patent
active
055115810
ABSTRACT:
A tank vent valve for use with a pilot valve that comprises a vent valve body containing a nozzle, a seat plate movable within said vent valve body which seats on said nozzle to seal the valve, and an articulated stem extending from the center of said seat plate and a diaphragm actuator mounted on said vent valve body comprising a resilient member, a support plate below said resilient member and a hollow member attached to said support plate extending toward said seat plate and surrounding said stem, said stem being slidably movable within said hollow member, the upper surface of said diaphragm being in fluid communication with the pressure in said tank through a pilot valve. The stem is terminated in a ball and socket arrangement so that the valve will still seat if the stem is slightly misaligned.
REFERENCES:
patent: 2848187 (1958-08-01), Henry
patent: 4019713 (1977-04-01), Deinlein-Kalb
patent: 4699175 (1987-10-01), Anderson et al.
patent: 4705065 (1987-11-01), McNeely et al.
patent: 4722360 (1988-02-01), Odajima et al.
The Protectoseal Company Catalog, 1990. Exhibit A-F.
Anderson Greenwood & Company Catalog, 1989. Exhibit H-L.
Groth Equipment Corporation Catalog, 1987. Exhibit M-N.
Hepperle Stephen M.
Johnson Kenneth H.
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