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:
Apr. 11, 1989
Filed:
Jan. 11, 1988
Hans D Reinartz, Frankfurt am Main, DE;
Helmut Steffes, Hattersheim, DE;
Alfred Teves GmbH, Frankfurt am Main, DE;
Abstract
A slip-controlled brake system is disclosed having a hydraulic power booster and a master cylinder arranged downstream of the power booster, wherein the pressure chamber of the power booster can be acted upon by an external pressure depending on the position of a pedal-actuatable brake valve, and wherein a fast-fill cylinder is provided which can be acted upon by the dynamic pressure and through which additional pressure fluid can be supplied to the brake circuits of the master cylinder. The fast-fill cylinder is equipped with a three-step bore wherein a piston with three shoulders is longitudinally displaceably arranged. A chamber in front of the large drive surface of the piston is connected to the dynamic brake circuit through a pressure fluid line and a chamber in front of an end face of the small step is connected to a static brake circuit through a second pressure fluid line. A first annular chamber formed between the large shoulder of the piston and the medium-sized step of the stepped bore than communicates with a second annular chamber formed between the medium-sized shoulder of the piston and the small step of the stepped bore through a pressure fluid channel and a valve. The second annular chamber is connected to a return line. In the event of a brake pressure control, additional pressure fluid flows from the chamber in front of the small step of the piston of the fast-fill cylinder into the brake circuit through the pressure fluid line. In this case, the fast-fill cylinder operates independently of the functioning of the anti-lock system.