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:
Aug. 20, 2002
Filed:
Jan. 26, 2001
Georg Obersteiner, Königstein, DE;
Josef Lauer, Nonnweiler, DE;
Continental Teves AG & Co. oHG, Frankfurt, DE;
Abstract
The present invention relates to an electromagnetic valve which includes a valve tappet that is axially movably arranged in a valve housing and fastened to a magnetic armature, and a valve piston axially movable in the valve housing, a diaphragm-type pressure fluid passage in the valve piston that is closed or opened by the valve tappet, another unthrottled pressure fluid passage arranged between the valve piston and the valve housing that is closed or opened by the valve piston, pressure fluid channels which open into the valve housing on either side of the valve piston, with both pressure fluid passages closed in the initial position of the electromagnetic valve. The valve piston will open the other, unthrottled pressure fluid passage only if, on the one hand, the hydraulic pressure acting on the valve piston in the valve closing direction is lower than the pressure of a spring fitted to the valve piston and active in the valve opening direction, and if, on the other hand, the pressure fluid passage in the valve piston is opened by the electromagnetic energization of the valve by means of the valve tappet.