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:
Mar. 16, 2004
Filed:
Jul. 08, 2002
Dirk Hofmann, Ludwigsburg, DE;
Hans-Friedrich Schwarz, Muehlacker, DE;
Gerhard Hahl, Korntal-Muenchingen, DE;
Valentin Schubitschew, Asperg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The valve ( ) has a seat valve ( ) comprising a hollow cone-shaped valve seat ( ) and an hemispherical shutoff element ( ). An afflux bore ( ) having contact with a pressure-medium inlet ( ) discharges centrically into the valve seat ( ). A solenoid armature ( ) acting upon the seat valve ( ) in opening fashion grips a push rod ( ) comprising the shutoff element ( ). The solenoid armature cooperates with a pole body ( ) according to the flat-type armature principle. A preloaded return spring ( ) acting on the seat valve ( ) in closing fashion is arranged between the pole body ( ) and the solenoid armature ( ). The valve ( ) works as a proportioning valve, because, in addition to a suitable design of the seat valve ( ) and push rod ( ), the magnetic force is infinitely variable and, together with a hydraulic force, has a monotonously increasing course as the valve opening stroke increases, while the spring force—which also has a monotonously increasing course as the valve opening stroke increases—has a positive slope that is greater than that of the course of the magnetic and hydraulic force.