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A jack which can lift a mobile home. A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic power. [1] The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be ...
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 ...
Richard Dudgeon (1819, Tain – 9 April 1895, New York City) [1] was a mechanic, noted for his inventions of the hydraulic jack and steam carriage. Born in Scotland, [2] he emigrated as a boy with his family to the United States, where he became a mechanic in New York.
The hydraulic fluid reservoir holds excess hydraulic fluid to accommodate volume changes from: cylinder extension and contraction, temperature driven expansion and contraction, and leaks. The reservoir is also designed to aid in separation of air from the fluid and also work as a heat accumulator to cover losses in the system when peak power is ...
A spreader is a hydraulic tool that is designed with two arms that come together in a narrow tip, and that uses hydraulic pressure to separate or spread the arms. The tip of the tool can be inserted into a narrow gap between two vehicle panels (such as between two doors, or between a door and a fender), then operated to create or widen an opening.
The arm of the hydraulic engine hoist raises and lowers with the use of a hydraulic jack, which is operated with a bar that pumps the hydraulic jack to raise the arm. To lower the arm, pressure is released from the hydraulic jack. [2] To support the hydraulic arm, a frame with a set of legs stabilizes the weight of the engine.
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