Motor vehicle accessory control with control module having single power terminal
US5572098A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1995 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Nov 22, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/04
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A motor vehicle accessory control is capable of reversibly activating a DC motor to operate a vehicle door lock, window, sun roof or similarly operated device through a relay controlled H-switch arrangement. The control is provided with an automatic control circuit in a module having input and output terminals but only a single power terminal, which provides either positive power or ground to the module. The opposite power connections are made from the module through the activating relay coils of the H-switch motor drive circuit. A manual switch may be provided for alternative manual reversible activation of the relays; and the circuit provides priority of manual over automatic operation. Neither the manual switch nor the module circuit is capable of activating both relays simultaneously; therefore, a reliable power connection is always available for the module through at least one of the relay activating coils.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.