Autobalance roping and drive arrangement
US6966408B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 29, 2002 |
| Grant date | Nov 22, 2005 |
| Priority date | — |
| Expiry date | May 1, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B7/068
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An autobalancing roping and drive arrangement for elevators which continuously balances the weight of an elevator cab and the weight of a counterweight such that the force on the drive motor necessary to move the cab from floor to floor is minimized. A weighting device connected to a drive sheave imparts a downward force on the drive sheave and creates a tension in a force section, causing traction contact between the drive sheave and the drive rope. The tension in the force section includes a downward vertical component of force. This component and the weight of the counterweight combine to create a downward force on one side of the suspension sheave section. The downward force balances the downward force created by the weight of the cab on the opposite side of the suspension sheave section. The tension in the force section automatically compensates for the difference in weight between the cab and the counterweight and thereby maintains the elevator in balance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.