System and method for minimizing horizontal vibration of elevator compensating ropes
US5861084A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1997 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Apr 2, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B7/06
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Tension of compensating ropes in an elevator system is electively changed to minimize horizontal vibration of the compensating ropes in tall buildings. The tension of compensating ropes is changed by a tensioning mechanism either when the horizontal movement of the compensating ropes exceeds a preset limit or when the building sway exceeds a predetermined amount. Additionally, the tension of compensating ropes can be changed when the elevator car is parked within certain predetermined top floors. The tension can be applied to a compensating sheave supporting the compensating ropes by a tensioning mechanism such as a hydraulic jack.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.