Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Patent
1987-03-17
1988-02-09
Nilson, Robert G.
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
137510, 137565, 137606, 137907, G05D 1608
Patent
active
047235713
ABSTRACT:
A fluid supply apparatus includes a pressure reducing valve. The inlet passageway of the valve is connectable to a first fluid supply and the outlet passageway of the valve is connectable to a fluid user capable of generating a subatmospheric pressure. The actuator of the valve biases the valve to a closed position. A pressure sensing line communicates the pressure from the outlet passageway of the valve to the actuator in opposition to bias of the actuator. The presence of a subatmospheric pressure at the outlet passageway of the valve will move the actuator and valve towards the open position allowing fluid to flow from the first fluid supply to the fluid user with the valve reducing the non-subatmospheric pressure of the fluid in the first fluid supply to the sub-atmospheric pressure of the outlet passageway. A flow dividing vane is provided in the valve between the orifice of the valve and the outlet passageway in order to minimize pressure fluctuations in the outlet passageway. A second fluid supply may be connected to the outlet passageway and a presence of a subatmospheric pressure in the outlet passageway will draw fluid from the second fluid supply into the outlet passageway. A relief passageway is provided between the inlet passageway and outlet passageway and includes a unidirectional valve which will allow fluid to flow only from the outlet passageway to the inlet passageway.
REFERENCES:
patent: 1461662 (1920-01-01), Kawamura
patent: 1583834 (1926-05-01), Humphrey
patent: 1587176 (1926-06-01), Olsen
patent: 2883998 (1959-04-01), Broughton
patent: 3028879 (1962-04-01), Anderson
patent: 3766933 (1973-10-01), Nicholson, Jr.
patent: 4350136 (1982-09-01), Yanagisawa
patent: 4408961 (1983-10-01), Laybourne
Nilson Robert G.
Watson Larry R.
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