| 摘要 |
PROBLEM TO BE SOLVED: To provide a valve opening display device capable of being formed in a compact shape without jumboizing a whole actuator, and mountable at a proper position on the actuator for allowing easy view of opening and closing conditions from the outside. SOLUTION: The valve opening display device for the actuator is mounted on a rotating shaft 4 which transmits power to an output shaft 3 of the actuator 1 for displaying a valve opening to the outside. It comprises an eccentric body 11 to be eccentrically rotated with the rotation of the rotating shaft 4, an external gear 12 arranged on the outer periphery side of the eccentric body 11 for revolving while rotating with the rotation of the eccentric body 11 to reduce the speed of rotation of the rotating shaft 4, and an internal gear 16 for internally gearing with the external gear 12. On the external gear 12, a display part 14 is provided for allowing the view of the valve opening from the outside. COPYRIGHT: (C)2007,JPO&INPIT
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