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. 03, 1995
Filed:
May. 11, 1994
Joachim Maas, Bad Vilbel, DE;
Klaus Michaelis, Waechtersbach, DE;
Alfred Teves GmbH, Frankfurt am Main, DE;
Abstract
A hydraulic brake system with anti-lock control, in particular for automotive vehicles, comprising a braking pressure generator (18), at least one wheel brake (5), an auxiliary-pressure pump (1), a low-pressure accumulator (22), and a shut-off valve and outlet valve (12, 7) for controlling the braking pressure. The shut-off valve is controlled to permit or prevent pressure fluid flow between the braking pressure generator and the wheel brake by a stepped piston positioned in a stepped bore in a housing. Initially, the stepped-piston maintains the shut-off valve open to permit pressure fluid flow. During slip control operation when pressure fluid from the low-pressure accumulator is delivered to the stepped-bore by the auxiliary-pressure pump, the stepped-piston closes the shut-off valve to prevent pressure fluid flow.