A valve actuator includes a motor and a gear assembly including an input gear rotated by driving force of the motor, an output gear receiving rotational force of the input gear, and at least one power transmission gear transmitting the rotational force of the input gear to the output gear. The valve actuator further includes a valve output shaft coupled to the output gear and actuated to close a path of a valve, and a selective power transmitter interrupting rotation of the output gear after the output gear is rotated at a predetermined angle by the rotational force of the input gear. After the valve is actuated to close the path, the driving force of the motor is not transmitted to the valve output shaft.

A vacuum valve includes a valve plate that covers an exhaust port of a vacuum chamber, and a poppet type actuator that drives the valve plate in an axial direction orthogonal to a surface of the vacuum chamber on which the exhaust port is provided. The actuator includes a shaft that is connected to the valve plate, a drive unit that is disposed side by side with the shaft in a radial direction of the shaft and includes a ball screw shaft and a drive source that rotates the ball screw shaft, and a connection part that connects the ball screw shaft and the shaft and moves in the axial direction together with the shaft to a position where the valve plate covers the exhaust port.

A throttle device comprises a throttle body, a throttle gear, and a coil spring. The coil spring comprises an intermediate hook part, a return spring part that is wound in one direction from the intermediate hook part, and an opener spring part that is wound in the opposite direction from the intermediate hook part. A gear-side end part of the opener spring part is connected to the throttle gear. The throttle gear comprises a spring guide part that holds the inner circumferential side of the opener spring part. The throttle gear comprises an outer circumferential support part that abuts the outer circumferential side of the first turn of the opener spring part on the intermediate hook part side.

In a first embodiment, a ventilator has a housing with a first fixed port and a rotatable shutter configured to cooperate with the housing to enclose an interior of the housing. The shutter has a first orifice at a first radial distance from its axis of rotation. A stationary plate abuts the shutter and includes a first stationary orifice configured to at least partially align with the first orifice of the shutter over a first rotational distance of the shutter. In this way, the first orifice and the first stationary orifice form a first variable port. The stationary plate may have a second stationary orifice and the shutter may have a second orifice configured to at least partially align with the second stationary orifice over a second rotational distance of the shutter.

A coupling arrangement is disclosed for the rotational coupling of a drive element of a pivoting drive of an exhaust-gas flap for the exhaust-gas flow of a combustion engine to a pivot shaft rotatable about a pivot axis. A first coupling element has a coupling region coupled to a pivot shaft for rotation about the pivot axis. A preload element generates a force acting on the first coupling element and the second coupling element in a peripheral direction with respect to one another and generates a force acting in an axial direction between the coupling elements. One of the coupling elements includes two radially outwardly extending rotational coupling projections and the other coupling element includes a rotational coupling cutout receiving the projection. The one coupling element is held axially on the other coupling element by the preload element to prevent the projections from moving out of the cutouts.

The invention relates to a valve for controlling a coolant circuit of a refrigerating system, preferably having a heat pump function, having a housing, which has at least one inlet opening and at least one outlet opening, having a regulating chamber provided in the housing, which extends between the at least one inlet opening and the at least one outlet opening, having a plugging opening provided on the housing, which is adjacent to the regulating chamber, having a valve arrangement, which is insertable at least partially into the regulating chamber, by means of which a current path of a medium between the at least one inlet opening and the at least on outlet opening is controllable, having a rotary slide arrangement, arranged in the regulating chamber, of the valve arrangement, which has a control disc, which is rotatable in relation to the at least one rotary slide support, wherein the at least one rotary slide support is provided non-rotationally to the housing and is allocated to the at least one outlet opening, wherein the at least one rotary slide support is mounted floatingly to the housing.

A valve for controlling the circulation of a fluid, having a valve body comprising a movable control member, an electrical actuator comprising a stator and a rotor, a sealing cover extending from the valve body to the inside of the stator, the sealing cover being positioned at the interface between the rotor and the stator in such a way that the rotor is inside the cover and submerged in the fluid, the stator being isolated from the fluid, the rotor rotating about a first axis and being secured to a shaft extending along the first axis, the movable control member moving in a linear manner along a second axis or in rotation about the second axis, characterized in that the shaft has an end forming, with a toothed wheel driving the movable control member, a gear pair with non-intersecting or intersecting axes.

A throttle valve device includes a shaft in a cylindrical passage, a slit passing through the shaft from one lateral side to another lateral side of the shaft, a pair of bearings on both sides of the cylindrical passage and rotatably supporting one end part and another end part of the shaft, and a circular-plate valve inserted into the slit of the shaft and rotatable to open and close the cylindrical passage. A length of the slit on the one lateral side of the shaft is, in an axial direction of the shaft, longer than a length of the slit on the other lateral side of the shaft. A round end hole is formed at an end of the slit in the one end part of the shaft on the one lateral side of the shaft.

An electrically controlled valve for the circulation of hot fluids is made up of an electromagnetic actuator and a valve. The valve has an opening provided with a movable sealing member driven by a rotation shaft perpendicular to the axis of the opening, the electromagnetic actuator driving the rotation of the shaft, the output shaft of the actuator being substantially coaxial with the rotation shaft. The front end of the rotation shaft and the front end of the output shaft are not in direct contact. The coupling between the rotation shaft of the valve and the output shaft of the actuator is provided by a coupling member placed between the front end of the output shaft and the front end of the shaft. The coupling member transmitting rotation torque with a misalignment tolerance between the output shaft and the rotation shaft of the valve. The valve also having thermally insulation for mechanical connection between peripheral areas of the body of the actuator and the body of the valve.

A control device for a WG actuator includes a feedback control unit for performing feedback control on the WG actuator in such a way that the position of a shaft detected by a position sensor gets close to a target position, and an abnormality detecting unit for providing an instruction to move the shaft in an axial direction for the feedback control unit, and for detecting an abnormality in the WG actuator on the basis of a result of a movement of the shaft, the movement being detected by the position sensor while the feedback control unit performs the instruction.