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:
May. 02, 1989
Filed:
Oct. 08, 1987
Norbert Ocvirk, Offenbach, DE;
Lutz Weise, Mainz, DE;
Alfred Teves GmbH, Frankfurt am Main, DE;
Abstract
An anti-lock brake system with traction slip control is disclosed. The system is the type including a pedal activated, auxilary force assisted braking pressure generator having two brake circuits. Each circuit supplies electromechanical valves controlled by an electronic controller in response to wheel behavior to increase and decrease brake pressure so as to control brake action and prevent wheel lock up. A normally closed valve is provided in at least one of two supply lines from an auxiliary pump and accumulator to the wheel brake inlet valve for controlling traction slip. A portion of the supply line which interconnects the pump and the valve communicates with one of the two main brake lines through a short-circuit line including a pressure relief valve. The pressure relief valve permits delivery of pressure fluid into the main brake line above a nominal pressure and prevents flow in the opposite direction.