Pressure actuated multiway valve

Details Pressure actuated multiway valve Pressure actuated multiway valve

1980-05-23

1982-01-26

Burns, Wendell E.

Fluid handling

Systems

Multi-way valve unit

137495, 13759612, F16K 1102

Patent

active

043123791

ABSTRACT:
A hydraulic motor drives the cooling fan of an internal combustion engine. Fluid flow from a fixed displacement pump is directed through a pilot-operated pressure-compensated control valve to the hydraulic motor. The valve has a continuous bias to a fan-on position for directing fluid to the fan motor. Flow to the fan motor is diverted by the valve as a function of the pressure of the fluid in the system. In addition, flow to the fan motor is diverted as a function of a pilot pressure signal which is controlled by the temperature of the engine coolant fluid. The valve failsafes to a condition directing maximum flow to the fan motor in the event of loss of pilot fluid pressure.

REFERENCES:
patent: 2621676 (1952-12-01), Loft
patent: 2985181 (1961-05-01), Nixon
patent: 3210938 (1965-10-01), Mendez
patent: 3568718 (1971-03-01), Wilke et al.
patent: 3695293 (1972-10-01), Zeuner
patent: 3726302 (1973-04-01), Lawsing
patent: 3736960 (1973-06-01), Cohen
patent: 4209040 (1980-06-01), Peters

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