Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1980-07-10
1982-03-02
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
1374937, 137508, 137538, 251368, F16K 17196
Patent
active
043174671
ABSTRACT:
There is disclosed a two-way valve which includes a single valve seat for controlling the flow of fluid in opposed directions through the valve responsive to differential fluid pressures across the valve. The valve includes first and second ports and a valve chamber. Across the valve chamber there is disposed a resilient diaphragm having an opening defining the valve seat. A ball valve element is supported in aligned relation to the valve seat and biasing means urge the ball element and valve seat into sealing engagement. When the pressure at the first port is greater than the pressure at the second port by a predetermined amount, the ball element moves away from the valve seat permitting fluid flow from the first port to the second port. When the pressure at the second port is greater than the pressure at the first port by a predetermined amount, the valve seat moves away from the ball element permitting fluid flow from the second port to the first port. Because the valve seat provides control for flow in both directions, the diaphragm opening conducts fluid in both directions through the valve.
REFERENCES:
patent: 2986159 (1961-05-01), Snyder
patent: 3067770 (1962-12-01), Fancher
patent: 3375844 (1968-04-01), Mercier et al.
patent: 3894556 (1975-07-01), Pareja
patent: 3983894 (1976-10-01), Sheppard
patent: 4167952 (1979-09-01), Reinicke
Buckman T. W.
Forsberg Jerold M.
Halvorsen Jack R.
Illinois Tool Works Inc.
Nilson Robert G.
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