Drive device for a movable part that can be displaced between end positions in a vehicle and method for the production thereof
US6163125A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1999 |
| Grant date | Dec 19, 2000 |
| Priority date | — |
| Expiry date | Jul 16, 2019 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2400/326
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An electric motor for moving or adjusting parts of vehicles such as windshield wipers and sunroofs have switching devices for shutting of the electric motor in at least one predetermined position of the movable part, for example also for shutting off the electric motors when the parts are disposed in their end positions. For this purpose, the switching devices have at least one permanent magnet that is for the actuation of switching contacts and, for example, is disposed on a switching gear, and have at least one sensor that is sensitive to magnetic fields. Different switching gears are stored for different sizes of parts to be moved. The invention sets forth a switching gear as an annular disk made of a magnetizable material, wherein the material is preferably comprised of a permanent magnet powder and a thermoplastic bonding. Such an annular disk is magnetized either in the immediate vicinity of an associated drive device or when installed in this drive device. After at least one associated sensor is installed and the drive device is closed, it is ready for installation in a vehicle. Particularly when the magnetization of the annular disk takes place when it is already installed,…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.