Electric parking brake system for a vehicle
US4561527A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 1984 |
| Grant date | Dec 31, 1985 |
| Priority date | — |
| Expiry date | Jan 31, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T7/12
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An improved parking brake system for a vehicle capable of switching the operation of the parking brake between an automatic control mode and a manual control mode at the operator's will. The parking brake is applied and released by an electromagnetic device which is controlled by a brake-application command signal and a brake-release command signal produced by a controller. The controller is adapted to be manually switched between a manual brake-application and brake-release control mode and an automatic control mode under the action of a switch. A power supply circuit is provided which has a battery and an ignition power source for supplying power to the electromagnetic device. The power supply circuit is operatively connected with the switch in a manner such that power is supplied to the electromagnetic device from the battery when the switch is manually operated to switch the controller into the manual brake-application control mode, and from the ignition power source when the switch is manually operated to switch the controller into the manual brake-release control mode. With this arrangement, even if the switch is thrown into a position for releasing the parking brake during s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.