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:
Apr. 09, 2002
Filed:
Nov. 13, 2000
Martin Steigerwald, Herzogenaurach, DE;
Jens Schäfer, Herzogenaurach, DE;
Matthias Dohr, Herzogenaurach, DE;
Ina Walzlager Schaeffler oHG, , DE;
Abstract
The Invention concerns g solenoid valve, more particularly a proportional hydraulic valve which is arranged within a hydraulic system of a device for varying the valve timing of gas exchange valves in an internal combustion engine. The solenoid valve ( ) generally comprises an electromagnet ( ) having a hollow cylindrical magnet housing ( ), at least one coil winding ( ) and an armature ( ) as Well as a first pole shoe ( ) and a second pole shoe ( ) and further comprises a valve member ( ) having a hollow cylindrical valve housing ( ) for receiving a spool valve which is displaceable relative to the valve housing ( ) by the armature ( ) of the electromagnet ( ). According to the invention, the electromagnet ( ) and the valve member ( ) are connected and fixed radially and axially to each other by force locking and/or positive engagement by the second pole shoe ( ) of the electromagnet ( ) which is arranged adjacent the valve member ( ) and configured as a plug-in lock for the valve housing ( ).