Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1993-01-05
1994-07-26
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Direct response valves
251333, F16K 1506
Patent
active
053320000
ABSTRACT:
A close tolerance fluid pressure relief or check valve includes a one-piece silicone poppet within a valve body. The poppet makes line contact with a concave seat surface at the inlet end of the body when the poppet is closed. A stem of the poppet extends into an inlet passage of the body to guide poppet movement centrally between open and closed positions. The poppet is biased to its closed position by a spring within the body, the pressure setting of which is controlled by a threaded nut or fitting defining an outlet passage and closing the outlet end of the body.
REFERENCES:
patent: 1733180 (1929-10-01), Biedermann
patent: 2447729 (1948-08-01), Bertea
patent: 2745432 (1956-05-01), Williams
patent: 3027134 (1962-03-01), Nichols
patent: 3782412 (1974-01-01), Darash
patent: 3835884 (1974-09-01), Ishikawa
patent: 4805664 (1989-02-01), Mattei
"Relief Valves 500 Series, Popoff, inline 0.5-150 PSi" brochure, Circle Seal Controls, Inc., (undated), pp. 1-6.
"Relief Valves 500 Series, Popoff, inline 0.5-150 PSI" brochure, Circle Seal Controls, Inc., (undated) pp. 1-8.
"200 Series Relief Valve" brochure, Acra Seal, 1 page, (undated).
"VRVI--Series VRVI Relief Valve--Inline 1/2 to 250 Psi" brochure, Generant Company, Inc. 2 pages, (undated).
"The Quad.RTM. Ring Seal--Reference data on applications, installation, materials and sizes" brochure, Minnesota Rubber and Gasket Company, pp. 1-12 (undated).
Gassner, Inc.
Nilson Robert G.
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