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2. Jack (device) - Wikipedia

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

   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 performed. Jacks are usually rated ...

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. Pump It Up! The Best Car Jacks for 2024, Tested - AOL

   www.aol.com/pump-best-car-jacks-2023-160900757.html

   With a low, low height of 3.8 inches on its lowest setting and a max lift height of 20.5 inches, the lifting range is versatile enough for a variety of cars and strong enough to handle the ...

5. Pumpjack - Wikipedia

   en.wikipedia.org/wiki/Pumpjack

   The technology is simple, typically using a parallel-bar double-cam lift driven from a low-power electric motor, although the number of pumpjacks with stroke lengths 54 inches (1.4 m) and longer being used as water pumps is increasing. A short video recording of such a pump in action can be viewed on YouTube. [6]

6. Lifting equipment - Wikipedia

   en.wikipedia.org/wiki/Lifting_equipment

   Lifting equipment, also known as lifting gear, is a general term for any equipment that can be used to lift and lower loads. [1] Types of lifting equipment include heavy machinery such as the patient lift , overhead cranes , forklifts , jacks , building cradles, and passenger lifts, and can also include smaller accessories such as chains ...

7. Mystery man who spent 9 hours with photographer Hannah ... - AOL

   www.aol.com/news/mystery-man-spent-9-hours...

   The mystery man who spent nine hours with photographer Hannah Kobayashi before she vanished told investigators that she was a “free spirit” — but otherwise seemed completely normal ...