Door operator assembly with motorized rollers
US6543581B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2000 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Jun 27, 2020 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/104
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An elevator system includes an elevator cab having doors that are movable between open and closed positions. A rail is mounted to the cab. At least one roller defines an axis of rotation and is mounted for movement along the rail. The roller is operably connected to the doors to move the doors between open and closed positions. A motor assembly is mounted for movement with the roller along the rail and has an output for providing a rotational driving force to the roller. In one embodiment, the motor drives a planetary drive assembly which drives the roller along the rail and in another embodiment the motor drives a worm gear assembly which drives the roller. Alternatively, a tree-axis torque motor generates a magnetic field that is non-perpendicular to the axis of rotation of the roller, which causes the roller to be driven along the rail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.