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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 ...
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]
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.
The TrailerCaddy Terminal Tractor is a low-cost solution for distribution centers that need to move heavy trailers. This small caddy can lift entire semi-trailers up to 100,000 pounds Skip to main ...
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 hook latch covers the opening in the hook head, effectively securing the lift bar inside the hook head during transport and dump. It is designed to augment the rear lock system during transit; Some systems utilize proximity switches to indicate to the operator which part of the lift/dump cycle is current, or whether there is a fault in the ...
Two modules of Cometto MSPE series configured with turntable operated by Eisele AG in Maintal.. A self-propelled modular transporter or sometimes self-propelled modular trailer (SPMT) is a platform heavy hauler with a large array of wheels which is an upgraded version of a hydraulic modular trailer.
Hoist atop an elevator. A hoist is a device used for lifting or lowering a load by means of a drum or lift-wheel around which rope or chain wraps. It may be manually operated, electrically or pneumatically driven and may use chain, fiber or wire rope as its lifting medium.
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