Elevator shaft door opening authorizing safety device
US8863910B2 · kind B2 · utility
2Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2009 |
| Grant date | Oct 21, 2014 |
| Priority date | — |
| Expiry date | Oct 21, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/165
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator system has at least two elevator cars, each of which has at least one elevator car door and each of which is provided for independent displacement in a common shaft, and a plurality of shaft doors and a safety device having at least one door opening sensor, at least one evaluation unit and at least one data line between the door opening sensor and the evaluation unit. The evaluation unit evaluates at least one signal of the door opening sensor in at least one evaluation step to prevent unauthorized opening of the shaft door.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.