Abstract: A circuit board positioning device for electric actuator comprises a base positioned inside a housing of an electric actuator; a first block made of an insulating material, a bottom side of the first block is disposed on a left side of the base, the first block comprises a first outer surface and a first inner surface, and the first inner surface is spacedly disposed with a plurality of first locators parallel to each other from top to bottom; and a second block made of an insulating material, a bottom side of the second block is disposed on a right side of the base, the second block comprises a second outer surface and a second inner surface, the second inner surface is spacedly disposed with a plurality of second locators parallel to each other from top to bottom, and the second locators are provided corresponding to the first locators.

Abstract: An electric valve actuator, including a power output member having a first engagement section; a rod member fixedly disposed on the power output member; a first transmission member pivotally disposed on the power output member and having a second engagement section and a first worm gear section; a second transmission member pivotally disposed on the rod member and having a shaft body section and an eccentric shaft section; a third transmission member pivotally disposed on the eccentric shaft section and having a third engagement section, a lower section of the third engagement section being engaged with the first engagement section, an upper section being engaged with the second engagement section; a fourth transmission member fixedly disposed on the shaft body section and having a second worm gear section; a first worm engaged with the first worm gear section; and a second worm engaged with the second worm gear section.

Abstract: An electric valve actuator, including a power output member having a first engagement section; a rod member fixedly disposed on the power output member; a first transmission member pivotally disposed on the power output member and having a second engagement section and a first worm gear section; a second transmission member pivotally disposed on the rod member and having a shaft body section and an eccentric shaft section; a third transmission member pivotally disposed on the eccentric shaft section and having a third engagement section, a lower section of the third engagement section being engaged with the first engagement section, an upper section being engaged with the second engagement section; a fourth transmission member fixedly disposed on the shaft body section and having a second worm gear section; a first worm engaged with the first worm gear section; and a second worm engaged with the second worm gear section.

Abstract: An electrical drive apparatus for valves includes: a main body having an internal first receiving space in which a transmission unit is received; a drive unit disposed on one side of the main body for driving the transmission unit to rotate; a hand wheel fixed with a top section of the transmission unit, a lower section of the hand wheel being formed with several sockets; and a switch unit for controlling whether the hand wheel and the first transmission shaft can be rotated so as to switch the electrical drive apparatus between an electrical drive operation mode and a manual drive operation mode.

Abstract: An electrical drive apparatus for valves includes: a main body having an internal first receiving space in which a transmission unit is received; a drive unit disposed on one side of the main body for driving the transmission unit to rotate; a hand wheel fixed with a top section of the transmission unit, a lower section of the hand wheel being formed with several sockets; and a switch unit for controlling whether the hand wheel and the first transmission shaft can be rotated so as to switch the electrical drive apparatus between an electrical drive operation mode and a manual drive operation mode.

Abstract: A position restoring apparatus for an open and close device includes a casing base, a first actuating member, a second actuating member, a first end cover, a second end cover, an output shaft and a motor. The casing base has main member with a hollow seat. The first actuating member has a first disk part with a first block and a first rack at a lateral side of the first block. The second actuating member has a second disk part with a second block and a second rack. The first end cover provides a plurality of first elastic components. The second end cover provides a plurality of second elastic components. The output shaft provides a joining part to mesh with the first and second racks. The motor shaft extends upward a rod part with an electromagnet, a stationary disk member and a movable disk member.

Abstract: A position restoring apparatus for an open and close device includes a casing base, a first actuating member, a second actuating member, a first end cover, a second end cover, an output shaft and a motor. The casing base has main member with a hollow seat. The first actuating member has a first disk part with a first block and a first rack at a lateral side of the first block. The second actuating member has a second disk part with a second block and a second rack. The first end cover provides a plurality of first elastic components. The second end cover provides a plurality of second elastic components. The output shaft provides a joining part to mesh with the first and second racks. The motor shaft extends upward a rod part with an electromagnet, a stationary disk member and a movable disk member.

Abstract: An electric driving device for a valve includes a lower casing member, a cover plate, a driving unit, a cylindrical part, a control part, a third rod and a fourth rod. The cover plate closes the open top of the lower casing member. The driving unit has an electric motor with a shaft being attached with a first gear. The cylindrical part with an axial bore is fixedly attached to the outer side of the lower casing member. The control unit has a first rod with being attached with a second gear to mesh with the first gear and a first elastic member is disposed on the first rod next to the first gear. A third gear is disposed next to the first elastic member and the second rod with the front section thereof being attached with a fourth gear. The third rod is disposed near the first rod in parallel with a fifth gear being attached to a front section thereof and a sixth gear being attached to a rear section thereof to mesh with the third gear.

Abstract: A position return device for an open and close apparatus includes a casing base, a first actuating member, a second actuating member, a first end cover, a second end cover, an output shaft and a motor. The casing base has a main member with a hollow seat at the top thereof. The first actuating member has a first disk part with a first block member extending from a lateral side thereof to form a first rack. The second actuating member has a second disk part with a second block extending from the right end thereof to form a second rack. The first end cover provides a plurality of first elastic members at the left end thereof. The second end cover provides a plurality of second elastic members at the right end thereof. The output shaft has a pinion joining part to mesh with the first and second racks. The motor shaft of the motor extends upward a rod part and the rod part is attached to an electric magnet, a stationary disk member and a movable disk member.

Abstract: A position return device for an open and close apparatus includes a casing base, a first actuating member, a second actuating member, a first end cover, a second end cover, an output shaft and a motor. The casing base has a main member with a hollow seat at the top thereof. The first actuating member has a first disk part with a first block member extending from a lateral side thereof to form a first rack. The second actuating member has a a second disk part with a second block extending from the right end thereof to form a second rack. The first end cover provides a plurality of first elastic members at the left end thereof. The second end cover provides a plurality of second elastic members at the right end thereof. The output shaft has a pinion joining part to mesh with the first and second racks. The motor shaft of the motor extends upward a rod part and the rod part is attached to an electric magnet, a stationary disk member and a movable disk member.

Abstract: An electric driving device for a valve includes a lower casing member, a cover plate, a driving unit, a cylindrical part, a control part, a third rod and a fourth rod. The cover plate closes the open top of the lower casing member. The driving unit has an electric motor with a shaft being attached with a first gear. The cylindrical part with an axial bore is fixedly attached to the outer side of the lower casing member. The control unit has a first rod with being attached with a second gear to mesh with the first gear and a first elastic member is disposed on the first rod next to the first gear. A third gear is disposed next to the first elastic member and the second rod with the front section thereof being attached with a fourth gear. The third rod is disposed near the first rod in parallel with a fifth gear being attached to a front section thereof and a sixth gear being attached to a rear section thereof to mesh with the third gear.