Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1978-01-23
1980-07-01
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
G05D 701
Patent
active
042101719
ABSTRACT:
An automatic fluid control valve for maintaining a substantially constant fluid flow includes a valve stem movable linearly within a casing and having valve means thereon cooperable with a valve port to regulate the flow of fluids therethrough in response to changes in fluid pressure differential, diaphragm means operatively connected to the valve stem and separating a region within the valve casing into a pair of pressure-differential chambers, a fluids passageway of variable cross-sectional area settable to establish a predetermined fluid flow rate through the control valve located intermediate the fluid inlet and the outlet and thereby establishing first and second fluid pressures respectively on the upstream and downstream sides of the fluids passageway, and means communicating the fluid pressure on the upstream side of the fluids passageway to one of the pressure differential chambers and the fluid pressure on the downstream side of the fluids passageway to the other of the pressure differential chambers.
REFERENCES:
patent: 2803264 (1957-08-01), Griswold
patent: 3028876 (1962-04-01), Gratzmuller
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