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. 11, 1988
Filed:
Feb. 25, 1987
Wolfram Seibert, Pfungstadt, DE;
Norbert Ocvirk, Offenbach, DE;
Alfred Teves GmbH, Frankfurt am Main, DE;
Abstract
A skid-controlled brake system comprising a pedal-operated vacuum booster (3) including a master cylinder (2) connected by way of brake lines (63, 64) to the wheel brakes (31, 32, 33, 34). The system further comprising a hydraulic auxiliary pressure supply system connected, by way of supply lines (24) to the brake circuits and including a hydraulic pump (26). A pressure compensation and pressure fluid reservoir (20) is provided. Wheel sensors (S.sub.1, S.sub.2, S.sub.3, S.sub.4) and electronic switching circuits (44) are provided for detecting the wheel rotating pattern and for generating electric brake pressure control signals to control, for skid control, an electromagnetically operable 3-way/2-position valve inserted into each brake line (63, 64). Control valves (10, 11) are disposed in the piston (6, 7) of the master cylinder (2) opening the pressure fluid passage from the pressure chambers (8, 9) of the master cylinder (2) to the annular chambers (14, 15) formed by circular grooves (54, 55) in the pistons (6, 7) and by the piston bore (65). The control valves (10, 11) are in communication, by way of compensating ports (16, 17) and hydraulic lines (18, 19), with the pressure fluid reservoir (20).