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:
Oct. 23, 1990
Filed:
Jun. 27, 1989
Reinhard Resch, Stuttgart, DE;
Abstract
A fail safe control for a brake unit with an integral hydraulic brake booster for a road vehicle with a hydraulic dual-circuit braking system having a static front-axle brake circuit and a static rear-axle brake circuit connected respectively to primary and a secondary outlet-pressure space. The primary outlet-pressure space is delimited, by a piston element of the primary-piston arrangement and is in constant communicating connection with a second part space which is delimited by a secondary piston and by two piston elements which are displaceable relative to one another. One of these two piston elements is designed as an annular piston and the second as a plunger piston. A yoke-shaped first axial-force transmission element couples the primary piston with only one of the two piston elements. There is also a second axial-force transmission element coupling the other piston element with the drive piston and a third axial-force transmission element, via which a pedal force acts on the yoke-shaped axial-force transmission element upon failure of the brake booster.