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  2. Vacuum servo - Wikipedia

    en.wikipedia.org/wiki/Vacuum_servo

    In the US it is commonly called a brake booster. A vacuum servo, also known as a power booster or power brake unit, uses a vacuum, usually supplied by the engine, to multiply the driver's pedal effort and apply that effort to the master cylinder .

  3. Power brakes - Wikipedia

    en.wikipedia.org/wiki/Power_brakes

    Vacuum boosters provide brake assist for the driver by multiplying the force out of the booster creating more than the force that was used to push on the brake pedal. The booster works by pulling the air out of the booster chamber with a pump or other vacuum source (typically the engine's intake manifold [1]), creating a low-pressure system ...

  4. Check valve - Wikipedia

    en.wikipedia.org/wiki/Check_valve

    A check valve, non-return valve, reflux valve, retention valve, foot valve, or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction. [ 1 ] Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave.

  5. Double check valve - Wikipedia

    en.wikipedia.org/wiki/Double_check_valve

    A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.

  6. Master cylinder - Wikipedia

    en.wikipedia.org/wiki/Master_cylinder

    The most common vehicle uses of master cylinders are in brake and clutch systems.. In brake systems, the operated devices are cylinders inside brake calipers and/or drum brakes; these cylinders may be called wheel cylinders or slave cylinders, and they push the brake pads towards a surface that rotates with the wheel (this surface is typically either a drum or a disc, a.k.a. a rotor) until the ...

  7. Here's why preeclampsia remains one of the most worrisome ...

    www.aol.com/heres-why-preeclampsia-remains-one...

    Throughout this time, trained medical professionals conduct a series of prenatal visits with the mother-to-be to make sure her questions and concerns are addressed and to check for any ...

  8. Sump pump - Wikipedia

    en.wikipedia.org/wiki/Sump_pump

    Alternative sump pump systems can be driven by municipal water pressure. Water-powered ejector pumps have a separate pump, float and check valve. [4] The float controlling a backup pump is mounted in the sump pit above the normal high water mark. Under normal conditions, the main electric powered sump pump will handle all the pumping duties.

  9. This Lego Disney Advent calendar is only $20 at Walmart ... - AOL

    www.aol.com/lifestyle/this-lego-disney-advent...

    This Advent calendar is incredibly popular at Walmart right now. In the last 24 hours, 1,000 have been sold, according to the retailer. It's no surprise—it features some of the most popular ...