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  2. Actuator - Wikipedia

    en.wikipedia.org/wiki/Actuator

    Electric rotary actuators use a rotary motor to turn the target part over a certain angle. [11] Rotary actuators can have up to a rotation of 360 degrees. This allows it to differ from a linear motor as the linear is bound to a set distance compared to the rotary motor.

  3. Massage chair - Wikipedia

    en.wikipedia.org/wiki/Massage_chair

    Traditional massage chair. A massage chair is a chair designed for massages. It can refer to two types of products. Traditional massage chairs allow a massage therapist to easily access the head, shoulders, and back of a massage recipient, while robotic massage chairs use electronic vibrators and motors to provide a massage. [1] [2]

  4. Linear actuator - Wikipedia

    en.wikipedia.org/wiki/Linear_actuator

    The motor may be attached to the end of the actuator. The drive motor is of typical construction with a solid drive shaft that is geared to the drive nut or drive screw of the actuator. Compact linear actuators use specially designed motors that try to fit the motor and actuator into the smallest possible shape.

  5. Comb drive - Wikipedia

    en.wikipedia.org/wiki/Comb_drive

    Comb-drives are microelectromechanical actuators, often used as linear actuators, which utilize electrostatic forces that act between two electrically conductive combs. Comb drive actuators typically operate at the micro- or nanometer scale and are generally manufactured by bulk micromachining or surface micromachining a silicon wafer substrate.

  6. Valve actuator - Wikipedia

    en.wikipedia.org/wiki/Valve_actuator

    Electric actuator (blue cylinder) on a valve in a power plant. A black handwheel is visible on the actuator, which allows manual positioning of the valve. The blue valve body is visible in-line with the pipe. The valve actuator opens or closes the butterfly disc of the valve based on electrical signals sent to the actuator.

  7. Stewart platform - Wikipedia

    en.wikipedia.org/wiki/Stewart_platform

    A Stewart platform is a type of parallel manipulator that has six prismatic actuators, commonly hydraulic jacks or electric linear actuators, attached in pairs to three positions on the platform's baseplate, crossing over to three mounting points on a top plate.

  8. Electro-hydraulic actuator - Wikipedia

    en.wikipedia.org/wiki/Electro-hydraulic_actuator

    Electro-hydraulic actuators (EHAs), replace hydraulic systems with self-contained actuators operated solely by electrical power. EHAs eliminate the need for separate hydraulic pumps and tubing, because they include their own pump, [1] simplifying system architectures and improving safety and reliability. This technology originally was developed ...

  9. Wax motor - Wikipedia

    en.wikipedia.org/wiki/Wax_motor

    A wax motor is a linear actuator device that converts thermal energy into mechanical energy by exploiting the phase-change behaviour of waxes. [1] During melting, wax typically expands in volume by 5–20% ( Freund et al. 1982 ).

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