Unitary hoist drum for hoist ropes and an electric cable
US5280880A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 1991 |
| Grant date | Jan 25, 1994 |
| Priority date | — |
| Expiry date | Jul 18, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D1/30
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A hoisting system is disclosed which includes a hoisting drum around which two hoisting ropes are wound in respective hoist rope grooves. The hoisting ropes are secured to the hoisting drum at one end, and extend down to a suspended device, such as an elevator, or a crane hook. The hoisting drum also includes a cable groove, which is located between the two hoist rope grooves. An electrical cable is secured at one end to the hoist drum, is wound around the hoist drum in the cable groove, and extends down to the suspended device. A slip-ring assembly establishes an electrical connection to the cable, so as to permit power to be supplied to the suspended device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.