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  2. Haldex (company) - Wikipedia

    en.wikipedia.org/wiki/Haldex_(company)

    Hesselman later became the leading producer of hydraulic aggregates located at the lifts at the end of trucks. The product is used this way for handicap buses, as well as within material handling industries. Haldex co-owned (from 2004) the company Alfdex with Alfa Laval, for production of separators for truck engines. Haldex after 2011:

  3. Relay valve - Wikipedia

    en.wikipedia.org/wiki/Relay_valve

    A relay valve is an air-operated valve typically used in air brake systems to remotely control the brakes at the rear of a heavy truck or semi-trailer in a tractor-trailer combination. Relay valves are necessary in heavy trucks in order to speed-up rear-brake application and release, since air takes longer to travel to the rear of the vehicle ...

  4. Air brake (road vehicle) - Wikipedia

    en.wikipedia.org/wiki/Air_brake_(road_vehicle)

    Truck air-actuated disc brake. An air brake or, more formally, a compressed-air-brake system, is a type of friction brake for vehicles in which compressed air pressing on a piston is used to both release the parking/emergency brakes in order to move the vehicle, and also to apply pressure to the brake pads or brake shoes to slow and stop the vehicle.

  5. Shuttle valve - Wikipedia

    en.wikipedia.org/wiki/Shuttle_valve

    Positioning a manual valve to neutral exhausts the air pilot pressure, closing the two-way valves, and trapping oil on both sides of the cylinder to lock it in position. [ clarification needed ] Standby and emergency systems: compressor systems requiring standby or purge gases capability are pressure controlled by the shuttle valve.

  6. Haldex Traction - Wikipedia

    en.wikipedia.org/wiki/Haldex_Traction

    Haldex Traction is a manufacturer of intelligent all-wheel drive (AWD) systems, founded in Sweden. Since the invention of Gen I in 1998, the company produced several generations of products licensed to and customized for some major automotive brands, that in turn have marketed Haldex Traction AWD under different names.

  7. FBI, DHS leaders decline to testify publicly about threats ...

    www.aol.com/news/fbi-dhs-leaders-decline-testify...

    WASHINGTON (Reuters) -FBI Director Christopher Wray and Homeland Security Secretary Alejandro Mayorkas declined to appear publicly on Thursday before a U.S. Senate committee to discuss national ...

  8. Want to follow Santa's flight? Here's when NORAD and Google's ...

    www.aol.com/want-santas-flight-heres-norad...

    The North American Aerospace Defense Command defends North American airspace 24 hours a day, 365 days a year. But on Christmas Eve, it tackles perhaps its most important mission: tracking Santa ...

  9. Blowout preventer - Wikipedia

    en.wikipedia.org/wiki/Blowout_preventer

    Gamma-ray imaging of the preventer conducted on May 12 and May 13, 2010 showed that the preventer's internal valves were partially closed and were restricting the flow of oil. Whether the valves closed automatically during the explosion or were shut manually by remotely operated vehicle work is unknown. [9]

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