| 摘要 |
An air hoist, also referred to as a winding machine, includes an air motor with a manifold thereon, a valve plate and an operating valve. The air motor includes a reversably rotatable drum about which an elongated load-carrying element, such as a chain or cable, is wound to permit lifting or lowering of a load. The drum is driven in either a clockwise or counterclockwise manner, thereby causing lowering or lifting, by fluid pressure supplied by a pneumatic or air supply. The lowering or lifting is controlled by fluid direction through the manifold, valve plate and operating valve which is controlled by the position of the operating valve. The manifold, valve plate and single operating valve being of a unique design and configuration.
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