Operating device and valve system
AssigneeYamatake Corporation
InventorsTomohiro Takano, Takumi Miyazaki
Life of this patent
Estimating the term…
Abstract
A spring return type valve system includes: a valve (2) having a valve shaft (22) to be operated rotationally for controlling the flow rate of fluid flowing through a fluid channel; an actuator (4) having an output shaft (42) rotated by an electric motor; a spring unit (3) having a rotating shaft (32) for transmitting the rotational power of the actuator output shaft to the valve shaft and a return spring for giving the rotating shaft a rotational power in one direction; and a yoke (5) for the actuator and the spring unit to be detachably mounted on.
Claims10
A spring return type operating device comprising:
- a yoke adapted to be mounted on an object to be operated having a rotating shaft;
- an actuator having a drive unit and an output shaft rotated by the drive unit, said actuator being detachably mounted on said yoke;
- and
- a spring unit detachably mounted on said yoke so as to lie between said actuator and said object to be operated, said spring unit having a rotating shaft and a return spring for producing a spring force for rotating the rotating shaft in one direction, said rotating shaft having a first end portion thereof adapted to be coupled to the rotating shaft of the object to be operated and a second end portion thereof coupled to the output shaft of said actuator, said yoke defining a space for accommodating at least part of said actuator and at least part of said spring unit, said space having an open face for making coupling portions of the first and second end portions of the rotating shaft of said spring unit with the rotating shaft of the object to be operated and the output shaft of said actuator, respectively, visible from exterior.
A spring return type valve system comprising:
- a valve having a valve shaft arranged rotatably and a valve element integral with the valve shaft;
- a yoke mounted on said valve;
- an actuator having a drive unit and an output shaft rotated by the drive unit, said actuator being detachably mounted on said yoke;
- and
- a spring unit having a rotating shaft and a spring for producing a spring force for rotating the rotating shaft in one direction, said spring unit bring detachably mounted on said yoke so as to lie between said actuator and said valve, said rotating shaft being coupled at both end portions to the output shaft and the valve shaft, respectively,
- wherein said yoke defines a space for accommodating at least part of said actuator and at least part of said spring unit, said space having an open face for making coupling portions of the both end portions of the rotating shaft of said spring unit with the valve shaft and the output shaft of said actuator, respectively, visible from exterior.
Dependencies are inferred from the claim text.