Device for the triggering of safety equipments of a lift plant
US5323877A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1992 |
| Grant date | Jun 28, 1994 |
| Priority date | — |
| Expiry date | Nov 18, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/18
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus is mounted on an elevator car for actuating a safety catch or a car brake when an excess car speed is detected in either a downward or an upward direction of travel, or when an unchecked movement of the elevator car takes place. The actuation takes place by movement of a pull rod cage connected to upper or lower pull rods, wherein the pull rod cage transmits a mechanical relative movement which is performed by a mechanical or an electromagnetic car speed monitoring device. Upper and lower sliding connections, which transmit tension forces and actuate the safety catch and the car brake respectively according to whether the car is moving downward or upwardly respectively, serve as connections between the pull rod cage and the upper and lower pull rods respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.