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:
Jul. 08, 1997
Filed:
Jun. 28, 1995
Wolfgang Joerg, Stuttgart, DE;
Jaromir Bordovsky, Berglen, DE;
Aydogan Cakmaz, Stuttgart, DE;
Hubert Heck, Duesseldorf, DE;
Arno Roehringer, Ditzingen, DE;
Claus Gall, Fellbach, DE;
Reinhold Abt, Neuhausen, DE;
Rainer Strauss, Kaarst, DE;
Karl-Hans Koehler, Wernau, DE;
Mercedes-Benz AG, Stuttgart, DE;
Abstract
A servo valve arrangement with a high-pressure, low-pressure and motor connection and with a pressure control valve arranged between the high-pressure connection and motor connection and a return control valve arranged between the motor connection and low-pressure connection is provided. The pressure control valve normally is closed and the return control valve normally is open. The pressure control valve can be opened by a common actuating member whilst closing the return control valve. The valve arrangement is suitable, in particular, for hydraulic power steering systems of motor vehicles with a so-called closed center.