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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.
Because there is a traveling pulley at the load, this doubles the mechanical advantage of the fixed (anchored) sprocket assembly, leading to a total mechanical advantage of 2 × P 1 / P 1 − P 2 . For instance, a 1-ton differential chain fall might have a 15-pocket and a 14-pocket sprocket set.
A drum hoist (steel wire rope visible) and motor. In underground mining a hoist or winder [1] is used to raise and lower conveyances within the mine shaft.Modern hoists are normally powered using electric motors, historically with direct current drives utilizing Ward Leonard control machines and later solid-state converters (), although modern large hoists use alternating current drives that ...
Hoist controller, a machine for raising and lowering goods or personnel by means of a cable; Hydraulic hooklift hoist, another machine; Hoist (mining), another machine; Hoist (flag), the half of a flag nearer to the flagpole; Hoist, by Phish; USS Hoist (ARS-40), a Bolster class rescue and salvage ship acquired by the U.S. Navy during World War II
Hydraulic hooklift hoists are mounted on heavy duty trucks to enable hauliers to change out flatbeds, dumpster bodies, and similar containers. Primarily used in conjunction with tilt frame bodies and specialised roller containers , generally designed for the transportation of materials in the waste , recycling , scrap and demolition industries ...
Now many hoists are package hoists, built as one unit in a single housing, generally designed for ten-year life, but the life calculation is based on an industry standard when calculating actual life. See the Hoists Manufacturers Institute site [2] for true life calculation, which is based on load and hours used. In today's modern world for the ...
A patient lift (patient hoist, jack hoist, Hoyer lift, or hydraulic lift) may be either a sling lift or a sit-to-stand lift.This is an assistive device that allows patients in hospitals and nursing homes and people receiving home health care to be transferred between a bed and a chair or other similar resting places, by the use of electrical or hydraulic power.
Manual crane from the late 19th century used for unloading small loads from ships at the Port of Barcelona, Spain A crane is a machine used to move materials both vertically and horizontally, utilizing a system of a boom , hoist , wire ropes or chains , and sheaves for lifting and relocating heavy objects within the swing of its boom.
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