Method of contactlessly monitoring elevator shaft doors
US6945363B2 · kind B2 · utility
14Cited by
12References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 2003 |
| Grant date | Sep 20, 2005 |
| Priority date | — |
| Expiry date | Oct 28, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/143
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A method for monitoring shaft doors of a elevator installation uses at least one contactlessly acting shaft door monitoring sensor to emit a beam of electromagnetic waves, wherein at least during specific detection phases the beam extends over several floors and is detected by a receiver. The beam is influenced by a shaft door panel not being completely closed and/or a shaft door lock not being disposed in the locking setting such that a disturbance signal is generated to the elevator control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.