The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 1985
Filed:
Jan. 31, 1984
Hiromasa Nakamoto, Hiroshima, JP;
Yukinobu Natsuaki, Hiroshima, JP;
Osamu Michihira, Hiroshima, JP;
Futoshi Shoji, Hiroshima, JP;
Mazda Motor Corporation, Hiroshima, JP;
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 stoppage of the vehicle on a slope with the parking brake applied, the parking brake is not released but held applied so that accidental starting of the vehicle is positively prevented, whereby safety is improved.