Fluid handling – Systems – Valves with separate – correlated – actuators
Patent
1991-11-07
1992-12-22
Michalsky, Gerald A.
Fluid handling
Systems
Valves with separate, correlated, actuators
137240, 137606, 251331, F16K 1100
Patent
active
051727285
ABSTRACT:
A three-way valve includes a cylindrical auxiliary valve shaft (12); a main valve shaft (11) provided within the cylindrical shaft; a cylindrical auxiliary valve plug (10) provided on a tip of the auxiliary valve shaft; a main valve plug (9) provided on a tip of the main valve shaft; a valve body (6); a first port (3) formed in the valve body in a direction of traveling of the main valve shaft; a main valve seat (1) formed around the first port for receiving the main valve plug, the main valve seat and the main valve plug constituting a main valve; an annular auxiliary valve seat (2) for receiving the auxiliary valve plug, the auxiliary valve seat and the auxiliary valve plug constituting an auxiliary valve; a common passage (13) formed between a contact area of the main valve plug with the main valve seat and a contact area of the auxiliary valve plug with the auxiliary seat; a second port (4) formed in the valve body for communicating with the first port via the common passage; a passage (14) formed outside the auxiliary valve seat; and a third port (5) formed in the valve body for communicating with the passage and the second port via the auxiliary valve and the common passage.
REFERENCES:
patent: 3080887 (1963-03-01), Brandenberg
patent: 3884259 (1975-05-01), Hosmer et al.
patent: 4744388 (1988-05-01), Ariizumi et al.
patent: 4794951 (1989-01-01), Ryzner
patent: 4860794 (1989-08-01), Parrott et al.
Michalsky Gerald A.
T.H.I. System Corporation
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