Fluid handling – Systems – Multi-way valve unit
Patent
1990-08-24
1990-06-12
Michalsky, Gerald A.
Fluid handling
Systems
Multi-way valve unit
25112918, 25112921, F15B 13044
Patent
active
049324390
ABSTRACT:
A solenoid actuated three-way valve is formed with a central passage communicating at one end with a vent passage via a first valve seat and communicating at its opposite end with a pressure supply port via a second valve seat. A control port directly communicates with the central passage at all times. An armature is slidable within the passsage to block one of the valve seats while opening the other and is resiliently biased toward one seat by a compression spring and magnetically biased toward the other seat by energization of the solenoid coil. Flux washers at opposite ends of the coil contact a ferromagnetic casing to provide an efficient flux path enabling rapid response of the armature to coil energization. One valve seat is loccated at one end of a pole piece threadably adjustable within one of the flux washers to establish a working gap in the magnetic circuit of a minimum width of the valve. A relatively large return gap is provided to minimize frictional losses within the valve.
REFERENCES:
patent: 2267515 (1944-12-01), Wilcox et al.
patent: 3521854 (1970-07-01), Leiber et al.
patent: 3828818 (1974-08-01), Hunt
patent: 4522371 (1985-06-01), Fox et al.
patent: 4678006 (1987-07-01), Northman et al.
patent: 4711265 (1987-12-01), Davis et al.
patent: 4756331 (1988-07-01), Stegmaier
Colt Industries Inc.
Michalsky Gerald A.
Potoroka, Sr. Walter
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