Elevator control having independent safety circuits
US7178635B2 · kind B2 · utility
20Cited by
9References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2005 |
| Grant date | Feb 20, 2007 |
| Priority date | — |
| Expiry date | Oct 24, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/22
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator installation with at least one shaft having a plurality of shaft doors is provided. At least two cars disposed one above the other travel up and down in the shaft. Each car has at least one car door. A safety device is provided for blocking the travel of the cars when the shaft doors or car doors are open. The safety device has at least two independent safety circuits, each having at least one shaft door and/or car door associated with it. Travel of at least one car can be blocked by means of the safety circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.