Method for releasing a load-carrying apparatus or a compensating weight of an elevator from a stopping position
US8668055B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2009 |
| Grant date | Mar 11, 2014 |
| Priority date | — |
| Expiry date | Feb 13, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/027
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator load receiving apparatus or a compensating weight connected thereto by a suspension device is released from a safety device in a stopping position after downward travel, the load receiving apparatus and the compensating weight being moved by a drive unit including a reversible electric motor and a traction sheave engaging the suspension device. Many safety devices, after stopping must be moved counter to the travelling direction of the load receiving apparatus before stopping in order to release (moved upwards in the case of stopping after downward travel). The safety device is easily released by activating the drive unit for a time (tmax1) or a certain distance (smax) with a predetermined torque (Mmax) counter to the direction of release and subsequently activated as abruptly as possible with the predetermined torque in the direction of release. This method can be used to release the compensating weight from its stopped position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.