Magnetic elevator door coupling
US5487449A · kind A · utility
11Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1994 |
| Grant date | Jan 30, 1996 |
| Priority date | — |
| Expiry date | Apr 6, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/12
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A magnetic coupling device is disposed on an elevator car door in a position to engage a magnetic vane disposed on a hoistway door which is to be opened in unison with the car door. The magnetic coupling unit may comprise either an electromagnet or a permanent magnet and has spring loaded rollers disposed above and below it so as to control the initial force of engagement between the elevator car door and the hoistway door, for smoother door opening operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.