Protective circuit
US4663537A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1985 |
| Grant date | May 5, 1987 |
| Priority date | — |
| Expiry date | Jun 26, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0851
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protective circuit for a manually controllable adjusting device for motor vehicle seats, which is driven by an electric motor, has a current sensor (11) with an output voltage which corresponds to the sum of all instantaneous currents flowing in the motor electrical circuit of the adjusting device. Furthermore, a threshold switch stage (14, 16, 24, 25, 26) which responds to a predetermined value of the output sensor (11) and a switch (12) which lies in the electrical circuit of the electric motor are provided. This switch (12) can be switched from its closed condition into its opened condition by the threshold switch stage when a threshold value is exceeded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.