Braking apparatus for elevator cage
US5323878A · kind A · utility
24Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Aug 20, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66D5/26
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A braking apparatus is provided for an elevator which includes a cage, a counterweight, a main sheave, a motor for rotating the main sheave, a deflector sheave, and a rope wound around the main sheave and the deflector sheave, the rope extending from the cage to the counterweight. The braking apparatus comprises a first brake for the main sheave, and a second brake for the deflector sheave. Both brakes are controlled to apply an appropriate braking force to the cage in accordance with the load and the speed of the cage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.