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2. Crank (mechanism) - Wikipedia

   en.wikipedia.org/wiki/Crank_(mechanism)

   According to F. Lisheng and T. Qingjun, the hand-crank of the rotary quern was different from a crank, which was the combination of a hand-crank and a push-and-pull connecting rod by a hinge. [7] The Antikythera mechanism, dated to around 200 BC, [25] [26] used a crank as a part of its mechanism. [27]

3. Recreational vehicle terms - Wikipedia

   en.wikipedia.org/wiki/Recreational_vehicle_terms

   It is usually a tripod that attaches to the king-pin of the fifth-wheel trailer hitch. Most are adjustable with a hand crank. Landing gear On a fifth-wheel trailer these are two jacks that are usually coupled together and are motor driven, that lift the front of the fifth-wheel trailer up so that the truck can be driven under the front and ...

4. Winch - Wikipedia

   en.wikipedia.org/wiki/Winch

   Winch used on a fishing boat to bring in nets. The earliest literary reference to a winch can be found in the account of Herodotus of Halicarnassus on the Persian Wars (Histories 7.36), where he describes how wooden winches were used to tighten the cables for a pontoon bridge across the Hellespont in 480 BCE.

5. Jack (device) - Wikipedia

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

   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 ...

6. Lufkin Industries - Wikipedia

   en.wikipedia.org/wiki/Lufkin_Industries

   Lufkin is a provider of rod lift products, automated control and optimization equipment and software for rod lift equipment to the oil and gas industry. It was an independent company until being acquired by GE Oil & Gas in July 2013, which later merged with Baker Hughes to create Baker Hughes, a GE Company (BHGE). On June 30, 2020, KPS Capital ...

7. Slider-crank linkage - Wikipedia

   en.wikipedia.org/wiki/Slider-crank_linkage

   Slider-crank chain inversion arises when the connecting rod, or coupler, of a slider-crank linkage becomes the ground link, so the slider is connected directly to the crank. This inverted slider-crank is the form of a slider-crank linkage that is often used to actuate a hinged joint in construction equipment like a crane or backhoe, as well as ...