Methods and apparatus for preventing undue wear of elevator actuators
US5765663A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | Nov 4, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B11/028
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Methods and apparatus are provided which can reduce life cycle costs associated with wear on active horizontal suspension actuators for elevators and also reduce cost of such actuators. The method includes discriminating lateral movement of elevator due to car loading imbalance from that of movement due to building sway and operating the actuators only in the case of lateral movement due to car loading imbalance. The discriminating may comprise the steps of detecting a car position outside a deadband, and allowing changes in the actuators to counter the forces causing such positional changes only if the car position stays outside the deadband for more than a predetermined time, e.g., more than half the predetermined period of building sway, which is an architectural constant for a particular building.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.