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:
Jun. 15, 1982
Filed:
May. 13, 1980
Jean L Dauvergne, Fosses, FR;
Societe Anonyme Francaise du Ferodo, Paris, FR;
Abstract
A hydraulic control system, for at least one hydraulic braking circuit, comprising a control unit, a brake pedal, an assisting hydraulic pressure plant having a fluid pressure source and a reservoir, a distributor valve having a slide fitted movably in the control unit between a rest position, when the braking circuit connects with the reservoir, and an active position, when the braking circuit is pressurized. This slide is urged in one direction by the pedal and in the opposite direction by the pressure in the braking circuit. The slide moves only about a millimeter, and to give the driver a resonable pedal displacement, a first resilient device, in the form of either stepped parallel or in series helical springs or an elastomer block, is disposed between the pedal and slide. To avoid excessive braking except in a real emergency, a second resilient device, either a spring or the elastomer block, is disposed between the pedal and unit and is adapted to be actuated by the pedal for only a fraction of the pedal stroke at its end of travel, to warn the driver that the end of travel is being approached.