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  2. Jack (device) - Wikipedia

    en.wikipedia.org/wiki/Jack_(device)

    A series of jacks is used and then wood cribbing temporarily supports the structure. This process is repeated until the desired height is reached. The house jack can be used for jacking carrying beams that have settled or for installing new structural beams. On the top of the jack is a cast iron circular pad that the jacking post rests on.

  3. Jackscrew - Wikipedia

    en.wikipedia.org/wiki/Jackscrew

    The maximum mechanical advantage possible for a hydraulic jack is not limited by the limitations on screw jacks and can be far greater. After World War II, improvements to the grinding of hydraulic rams and the use of O ring seals reduced the price of low-cost hydraulic jacks and they became widespread for use with domestic cars. Screw jacks ...

  4. Hydraulic compressor - Wikipedia

    en.wikipedia.org/wiki/Hydraulic_compressor

    A hydraulic compressor is a means of compressing air using hydraulic energy. There are two very different types of machines referred to as hydraulic compressors. One type is a mechanical air compressor that is driven by a hydraulic motor. It is a method of converting hydraulic power to pneumatic power. [1]

  5. Pallet jack - Wikipedia

    en.wikipedia.org/wiki/Pallet_jack

    Typical manual pallet jack (lowered) A pallet jack, also known as a pallet truck or pallet pump, is a tool used to lift and move pallets.Pallet jacks are the most basic form of a forklift [1] and are intended to move palletized loads within warehouses, distribution centers, retail stores, and construction sites.

  6. Strand jack - Wikipedia

    en.wikipedia.org/wiki/Strand_jack

    Animation of a strand jack. Strand jacks can be used horizontally for pulling objects and structures, and are widely used in the oil and gas industry for skidded loadouts. Oil rigs of 38,000 t have been moved in this way from the place of construction on to a barge. Since multiple jacks can be operated simultaneously by hydraulic controllers ...

  7. "The technology is being used as a way of keeping an arm's length from one big company to the other. But that's an illusion." In the company's own words, from company documents included in the ...

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