Elevator active suspension system
US5439075A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Mar 9, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B11/0286
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An elevator car vertically guided along a hoistway rail has horizontal motions controlled by means of an actuator wherein horizontal acceleration of the elevator car and relative horizontal displacement between the car and the rail is sensed for controlling such horizontal motions by means of the actuator. Guiding means can be provided in the form of roller clusters at the corners of the car for engaging hoistway rails on opposite sides of the car wherein, for each roller cluster, plural actuators are included with accompanying springs wherein the roller cluster actuators are responsive to the controller for actuating the elevator car horizontally with respect to the hoistway rail. The roller cluster actuators can be electromagnets. Each wheel of the roller cluster can have stop means assocaiated therewith that is operable to limit the extent of movement of the guide wheel in a direction away from the guide rail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.