Gravity check valve

Details Gravity check valve Gravity check valve

1994-09-16

1998-03-10

Rivell, John

Fluid handling

Line condition change responsive valves

Direct response valves

137433, 137533, 220705, 239 33, A47G 1922

Patent

active

057250189

ABSTRACT:
My invention is a gravity check valve 20 that will have a relatively low back flow of liquid when the sealing seat 2 is positioned above the porous seat 8 and the direction of back flow of liquid is opposite to the direction of the force of gravity 18.

REFERENCES:
patent: 1519832 (1924-12-01), Griffin
patent: 1832266 (1931-11-01), Thomas
patent: 1878947 (1932-09-01), Luff et al.
patent: 1993732 (1935-03-01), Bijur
patent: 2959144 (1960-11-01), Youtie
patent: 3773256 (1973-11-01), Wright
patent: 4196747 (1980-04-01), Quigley
patent: 4296778 (1981-10-01), Anderson
patent: 4428490 (1984-01-01), Holloway
patent: 4971048 (1990-11-01), Seekins
patent: 5199633 (1993-04-01), Jantzen

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