Safety circuit in an elevator system
US9061863B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 20, 2010 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Oct 8, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B13/22
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A safety circuit in an elevator system includes at least one series connection of safety-relevant contacts that are closed during trouble-free operation of the elevator system, wherein in the case of certain operating conditions in which at least one contact is opened, the at least one contact can be bridged by semiconductor switches, and wherein the semiconductor switches are controlled by at least one processor and monitored by at least one monitoring circuit for short circuits. At least one electromechanical relay circuit, having relay contacts connected in series with the contacts of the bridged series connection can be controlled by the at least one processor and the bridgable series connection can be interrupted by the relay contacts in the case of short-circuiting of the semiconductor switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.