| 摘要 |
<p>A lifting device for raising, lowering and suspending heavy loads comprises a climbing jack with alternating gripping means and a lifting element. For allowing repeated cooperation with the gripping means the lifting element consists of a plurality of outer wire elements and at least one inner wire element, where the elasticity of at least one inner wire element is greater than the elasticity of the outer wire elements. Usually, the outer wire elements are arranged in groups, with spaces between the groups.</p> |
