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:
Feb. 07, 1978
Filed:
Dec. 22, 1976
Toshiyuki Kondo, Anjo, JA;
Aisin Seiki Kabushiki Kaisha, Kariya, JA;
Abstract
A hydraulic braking system for vehicles having front and rear wheel brakes energized from a master cylinder and wherein energization of the rear wheel brakes is interrupted by a cut-off valve which closes in response to a signal indicating a skid condition. The cut-off valve is normally held open by pressure from a fluid pressure source controlled by an actuator and is opposed by master cylinder pressure. The skid condition signal causes the sourced pressure to the cut-off valve to lower and the valve to close. The controlled pressure from the fluid pressure source to the cut-off valve is at least a predetermined minimum value to prevent unintended or premature valve closure, and an optimum ratio of that pressure to master cylinder pressure for increasing values of master cylinder pressure is maintained for stability of the system. Furthermore, this system can include a fail-safe valve operable to provide for brake energization in the event of failure of pressure from the pressure source.