Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1978-12-20
1981-09-15
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
137521, G05D 701
Patent
active
042891612
ABSTRACT:
A fluid flow regulator wherein a shaft which extends transversely of the passage in a tubular housing carries a flap having two mutually inclined sections. A spring biases the flap to a fully open position and the flap is moved from such open position toward a fully closed position by the fluid which flows through the passage in a direction from the one toward the other axial end of the housing. A flow restricting device is installed in the housing so that it defines one or more channels for the flow of fluid against one or more selected portions of or against the entire flap, depending upon whether the flap extends across the entire passage or across a central portion of the passage. The flow restricting device enhances the sensitivity of the flap so that the latter can change its position in response to each variation of the pressure of fluid which is caused to flow through the housing at a relatively low pressure.
REFERENCES:
patent: 7148 (1876-05-01), Rhamy
patent: 3276480 (1966-10-01), Kennedy
patent: 3965928 (1976-06-01), Siegwart
Kontler Peter K.
Nilson Robert G.
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