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  2. Power window - Wikipedia

    en.wikipedia.org/wiki/Power_window

    Inside driver's door showing hydraulic cylinder for power window Window controls on center console between front seats (2005 Saab 9-5) Packard had introduced hydraulic window lifts (power windows) in fall of 1940, for its new 1941 Packard 180 series cars. [1] [2] This was a hydro-electric system.

  3. Door closer - Wikipedia

    en.wikipedia.org/wiki/Door_closer

    A door closer is a mechanical device that regulates the speed and action of a door ’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior. Door closers can be linked to a building's fire and security alarm systems.

  4. Electrohydraulic servo valve - Wikipedia

    en.wikipedia.org/wiki/Electrohydraulic_servo_valve

    An electrohydraulic servo valve (EHSV) is an electrically-operated valve that controls how hydraulic fluid is sent to an actuator. [1][2][3][4][5][6] Servo valves are often used to control powerful hydraulic cylinders with a very small electrical signal. Servo valves can provide precise control of position, velocity, pressure, and force with ...

  5. 10 Genius Ways to Use Your Vacuum (Besides Just Cleaning Your ...

    www.aol.com/10-genius-ways-vacuum-besides...

    To keep your window unit running efficiently, regularly vacuum the front grilles, body and control panel with your vacuum’s soft dusting brush tool to remove any loose dust and debris. You ...

  6. Servomechanism - Wikipedia

    en.wikipedia.org/wiki/Servomechanism

    The term correctly applies only to systems where the feedback or error-correction signals help control mechanical position, speed, attitude or any other measurable variables. [5] For example, an automotive power window control is not a servomechanism, as there is no automatic feedback that controls position—the operator does this by observation.

  7. 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 ...

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