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  2. Hydraulic tappet - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_tappet

    A hydraulic tappet, also known as a hydraulic valve lifter or hydraulic lash adjuster, is a device for maintaining zero valve clearance in an internal combustion engine. Conventional solid valve lifters require regular adjusting to maintain a small clearance between the valve and its rocker or cam follower. This clearance prevents the parts ...

  3. Tappet - Wikipedia

    en.wikipedia.org/wiki/Tappet

    A hydraulic tappet, also known as a "hydraulic valve lifter" and "hydraulic lash adjuster", contains a small hydraulic piston that becomes filled with pressurised engine oil. [4] [11] The piston acts as a hydraulic spring that automatically adjusts the tappet clearance according to the oil pressure. Although the movements of the piston are ...

  4. Valve float - Wikipedia

    en.wikipedia.org/wiki/Valve_float

    Valve float is an adverse condition which can occur at high engine speeds [1] when the poppet valves in an internal combustion engine valvetrain do not properly follow the closure phase of the cam lobe profile.

  5. We’re putting the top sheet debate to bed - AOL

    www.aol.com/news/putting-top-sheet-debate-bed...

    Bed sheets get dirty very quickly, Azodi says. We transfer germs and bacteria from our skin to the fabric overnight, as well as sweat in our sleep and shed hair and skin cells. If you have pets ...

  6. Self-tapping screw - Wikipedia

    en.wikipedia.org/wiki/Self-tapping_screw

    A self-tapping screw is a screw that can tap its own hole as it is driven into the material. More narrowly, self-tapping is used only to describe a specific type of thread-cutting screw intended to produce a thread in relatively soft material or sheet materials, excluding wood screws.

  7. Tap and die - Wikipedia

    en.wikipedia.org/wiki/Tap_and_die

    A tap is used to cut or form the female portion of the mating pair (e.g. a nut). A die is used to cut or form the male portion of the mating pair (e.g. a bolt). The process of cutting or forming threads using a tap is called tapping, whereas the process using a die is called threading.

  8. Rocker arm - Wikipedia

    en.wikipedia.org/wiki/Rocker_arm

    Some OHC engines employ short rocker arms, also known as finger followers, [2] in which the cam lobe pushes downward on the back of the rocker arm to open the valve. In such a configuration one end of the follower is anchored (pivoting in place on a roller bearing), rather than having its fulcrum in the center like standard rocker arms.

  9. Patient lift - Wikipedia

    en.wikipedia.org/wiki/Patient_lift

    A patient lift (patient hoist, jack hoist, Hoyer lift, or hydraulic lift) may be either a sling lift or a sit-to-stand lift.This is an assistive device that allows patients in hospitals and nursing homes and people receiving home health care to be transferred between a bed and a chair or other similar resting places, by the use of electrical or hydraulic power.

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