Elevator
US7207421B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2005 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Jul 8, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B19/007
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator in which the elevator car is suspended by means of hoisting ropes consisting of a single rope or several parallel ropes, said elevator having a traction sheave which moves the elevator car by means of the hoisting ropes. The elevator has rope portions of the hoisting ropes going upwards and downwards from the elevator car, and the rope portions going upwards from the elevator car are under a first rope tension (T1) which is greater than a second rope tension (T2), which is the rope tension of the rope portions going downwards from the elevator car, and that the elevator comprises a compensating system for keeping the ratio (T1/T2) between the first and the second rope tensions substantially constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.