Elevator door monitor and drive safety apparatus
US8899383B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2011 |
| Grant date | Dec 2, 2014 |
| Priority date | — |
| Expiry date | Apr 7, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K17/968
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A safety apparatus for elevator apparatuses which can move a cab by way of a drive, including: a first safety circuit, which has a closed conduction state and an open conduction state, with an interrupting apparatus for interrupting the drive depending on the conduction state of the first safety circuit, a safety device, which includes at least two sensors, which can be switched between at least two switching states depending on the closing state of the elevator door. In order to be able to improve the susceptibility to maintenance, a switching unit is provided which can be switched between at least two switching states by connection to the safety device and is designed to effect the closed and/or open conduction state of the first safety circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.