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:
Jan. 26, 1982
Filed:
Jun. 26, 1979
Rene G Filderman, Asnieres, FR;
Societe Anonyme Francaise du Ferodo, Paris, FR;
Abstract
The invention relates to a hydraulic control, particularly for automobile brake systems having two separate independent brake circuits, in which a master cylinder comprises a first chamber in which pressure is controlled by the driving-in of a master piston under the action of a brake pedal, the first chamber forms a part of a first hydraulic closed system comprising a first brake circuit, the master cylinder also has a second pressure chamber forming part of a second closed system comprising a second brake circuit. The second chamber is adapted to be fed by a source of fluid pressure and the master cylinder is provided with a plunger the opposite faces of which are respectively subjected to the pressures of the two closed systems. The master piston is disposed in the first chamber coaxially with the plunger in such a manner as to permit mechanical intervention in the event of hydraulic failure in the first closed system. The feature of the invention resides in the mounting of the piston in a part accommodated in the body of the master cylinder.