Method and device of reblocking to an increased or reduced number of rope parts at a hoisting gear
US3993287A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 1974 |
| Grant date | Nov 23, 1976 |
| Priority date | — |
| Expiry date | Jan 29, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D3/043
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
In a lifting gear comprising a lifting cable and two blocks, e.g. the upper trolley block and the lower hook block, respectively, of a hoisting crane, the number of cable parts, in which the lower block is hanging, is changed, in order to increase or decrease the lifting capacity, by means of a cable catching means being arranged on the lower block, which catching means is capable of catching (or disengaging) a cable part running horizontally in the upper block, which cable part is pulled down as two further parts with the catching means and at ground level laid under a further rope pulley of the lower block. Reblocking to fewer cable parts is carried out in the reverse order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.