Fluid handling – Systems – Multi-way valve unit
Patent
1989-12-12
1990-10-30
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
137269, 1376256, 251 26, F15B 13043
Patent
active
049661965
ABSTRACT:
A servo-operated multiway valve is disclosed which can be optionally used as both a pressurization valve and a ventilation valve for use with a fluid consuming device. The valve utilizes a valve body to allow fluid communication alternatively between two inlet/vent fluid chambers and an outlet fluid chamber disposed along a central bore, in which the valve body is located. The device utilizes a servo to displace the valve body of the multiway valve. Fluid may be introduced to the valve through either of two inlet/vent chambers, to alternatively allow fluid to flow to the outlet chamber in the resting or the activated mode of the servo. The servo is in fludi communication with the selected inlet chamber at all times, and does not communicate with the selected vent chamber. This is achieved through the use of dual passages, connecting each of the inlet/vent chambers to the servo. Fluid flows from the appropriate inlet chamber to the servo, through the associated passage. A check valve in each passage prevents backflow between the servo and the associated chamber, when that chamber is functioning as a vent.
REFERENCES:
patent: 2925984 (1960-02-01), Kowalski
patent: 4257572 (1981-03-01), Neff
patent: 4491155 (1985-01-01), Meyer et al.
patent: 4627597 (1986-12-01), Brausfeld et al.
patent: 4627597 (1986-12-01), Brausfeld et al.
Wabco Westinghouse Steuerungstechnik Industrie-Programm Catalog (undated).
Article entitled "Designing and Developing a Modern Pneumatic Valve", Power, May 1979, p. 205.
Michalsky Gerald A.
WABCO Westinghouse Steuerungstechnik GmbH & Co.
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