Valves and valve actuation – Electrically actuated valve – With nonelectrical actuator
Patent
1988-12-07
1990-04-10
Rosenthal, Arnold
Valves and valve actuation
Electrically actuated valve
With nonelectrical actuator
25112911, 1374875, 1374546, F16K 3104, G05D 1600
Patent
active
049153498
ABSTRACT:
A gas governor apparatus comprises an inner casing removably mounted on an outer casing. Further, a driving mechanism for driving a valve body to control pressure and flow rate of fluid between the valve body and a valve seat formed in the inner casing comprises a drive motor and a drive shaft. The drive shaft has a dual drive sleeve construction where an outer drive sleeve and the valve body are constituted as a rotating drive mechanism and an inner drive sleeve and the outer drive sleeve are constituted as an axial shifting drive mechanism. The outer and inner drive sleeves are axially shiftable by means of an elastic member. The valve body and the inner casing are maintained sealingly by dual expansible members. A flow passage is defined by the dual expansible members and the inner casing. An intermediate pressure chamber is switched to communicate with one of a primary pressure circuit communicating to primary pressure and a secondary pressure circuit communicating to secondary pressure by means of a three-way switching valve to permit introduction of the fluid into the intermediate pressure chamber.
REFERENCES:
patent: 4503878 (1985-03-01), Taylor
patent: 4503884 (1985-03-01), Spils
patent: 4723753 (1988-02-01), Torimoto et al.
Chiba Yoshiaki
Inoue Tomoaki
Kawaike Kazuhiko
Sonoda Shinji
Watahiki Seishi
Hitachi , Ltd.
Rosenthal Arnold
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