Vacuum lifting device
US5752729A · kind A · utility
85Cited by
4References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | May 29, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B11/007
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A vacuum lifting device that is particularly suitable for lifting refractory slabs used to line aluminum smelting cells incudes suction cups which engage the object to be lifted. A plurality of mechanical supports can be moved so that they extend at least partly underneath the object being lifted when the object is raised from the ground. The mechanical supports can hold the object in case of vacuum failure and improve the safety of the device. An optional automatic override can ensure that the mechanical supports are in the down position in the case of vacuum failure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.