Fluid handling – Systems – Dividing into parallel flow paths with recombining
Patent
1985-02-01
1986-11-25
Schwadron, Martin P.
Fluid handling
Systems
Dividing into parallel flow paths with recombining
2511291, 25112921, F16K 3106
Patent
active
046242821
ABSTRACT:
A two-stage solenoid valve uses a pair of stacked coaxial armatures in a cylindrical sleeve housing. A first armature is provided with a fluid sealing ring and is urged by a first spring to peripherally seal an adjacent internal fluid port in a valve base supporting a first end of the sleeve housing. The first armature is provided with a coaxial bore extending through the armature and coaxial with the fluid sealing ring to form a fluid channel. The second armature also has a coaxial bore extending therethrough with a resilient sealing member slideably retained within the bore. A second spring is arranged to urge the resilient sealing member against a first end of the bore in the second armature and to extend therefrom to a fixed plug in a second end of the cylindrical housing. The resilient sealing member cooperates with a fluid port defining an end of the coaxial bore in the first armature opposite the end of the first armature having the fluid sealing surface. A first and a second solenoid coil are coaxially stacked to surround the cylindrical sleeve housing adjacent to respective ones of the first and second armatures. An energization of the second coil provides a first fluid path through the bore in the first armature while an energization of both coils provides a second fluid path directly through the fluid port in the valve base to provide a first and a second flow rate, respectively, through the valve.
REFERENCES:
patent: 1882392 (1932-10-01), Musgrave
patent: 3100103 (1963-08-01), Bullard
patent: 3149644 (1964-09-01), Bosack
patent: 3771562 (1973-11-01), Curran
patent: 4102526 (1978-07-01), Hargraves
patent: 4342443 (1982-08-01), Wakeman
patent: 4403765 (1983-09-01), Fisher
Halista Mitchell J.
Hepperle Stephen M.
Honeywell Inc.
Joike Trevor B.
Schwadron Martin P.
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