Valves and valve actuation – Electrically actuated valve – Rotary electric actuator
Patent
1993-12-23
1994-10-04
Rosenthal, Arnold
Valves and valve actuation
Electrically actuated valve
Rotary electric actuator
25112912, 25112905, F16K 3104
Patent
active
053519353
ABSTRACT:
A pushing type motor-driven control valve device for opening and closing a valve by a reciprocating motion of a motor shaft driven by normally and reversely rotating a motor, said pushing type motor-driven control valve device comprises a valve shaft for driving the valve; a motor shaft for driving the valve shaft, said motor shaft being separated from and disposed coaxially with the valve shaft; a valve shaft spring for urging the valve shaft in a first direction of closing the valve; and a motor shaft spring for urging the motor shaft in a second direction of opening the valve; wherein a first pushing force applied on the motor shaft by the motor shaft spring is set to be smaller than a second pushing force applied on the valve shaft by the valve shaft spring.
REFERENCES:
patent: 4742989 (1988-05-01), Akagi
patent: 5137255 (1992-08-01), Sumida et al.
patent: 5184593 (1993-02-01), Kobayashi
Miyake Toshihiko
Miyoshi Sotsuo
Okada Hidetoshi
Mitsubishi Denki & Kabushiki Kaisha
Mitsubishi Electric Engineering Company Limited
Rosenthal Arnold
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