Three-way flow-regulating valve

Details Three-way flow-regulating valve Three-way flow-regulating valve

1981-08-18

1982-12-28

Spiegel, H. Jay

Fluid handling

Self-proportioning or correlating systems

Self-controlled branched flow systems

G05D 1100

Patent

active

043656455

ABSTRACT:
A three-way or three-ported flow-regulating valve for use in a hydraulic system comprises a two-position two-ported throttle valve inserted between an inflow conduit and an outflow conduit and a pressure-relief valve connected to the inflow conduit at an upstream point thereof and at a downstream point proximate to an intake port of the throttle valve. A servovalve is connected in parallel to the throttle valve via small-diameter pressure-transmission channels extending to the intake port and to an output port of the throttle valve. Upon a jump in the pressurization of the inflow conduit, for example due to the activation of an auxiliary pump, the pressure-relief valve opens; it closes again only upon an equalization of the pressure throughout the inflow conduit. The servovalve has a biasing spring which exerts a force determining the maximum pressure drop across the throttle valve.

REFERENCES:
patent: 3005463 (1961-10-01), Van Meter
patent: 3128783 (1964-04-01), Cowles et al.
patent: 3318321 (1967-05-01), Odendahl
patent: 3965921 (1976-06-01), Thurston
patent: 4114637 (1978-09-01), Johnson
patent: 4285198 (1981-08-01), Budecker

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