| 摘要 |
<p>The subject of invention is an appliance for hoisting loads. A technical problem the invention is solving is hoisting of loads by means of elastic energy which an elastic or a spring or a spring plus an elastic recover from the weight of a worker, a tool or an appliance. The appliance is made as a bar, kinked for an angle between 90 to 120 degrees at the height exceeding a worker's height for at least 10 percent. The bar is fixed to a base heavier than the elastic energy and the mass at the end of the elastic. The base is a static or a movable one. The bar is stiff or movable around its own axis at its lower part, or telescopic or movable plus telescopic. The facilitation of work depends on the elastic energy. The invention is applicable especially on the field of civil engineering (e.g. manual loading of sand), farming and other related branches.</p> |
