Electromagnet and elevator door coupler
US8678140B2 · kind B2 · utility
1Cited by
12References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 2005 |
| Grant date | Mar 25, 2014 |
| Priority date | — |
| Expiry date | Jan 2, 2028 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/125
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator door assembly (20) includes an electromagnet (30) use as part of a door coupler for coupling elevator car doors (24) to elevator hoistway doors (26). A disclosed example includes an electromagnet core (40) with a gap (50) in one of four sides of the core. The gap (50) directs and concentrates magnetic flux of the electromagnet (30) to concentrate an attractive force for coupling the electromagnet (30) with a vane (32). Disclosed examples includes unique geometric and dimensional relationships to achieve a desired goodness factor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.