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:
Nov. 30, 2010
Filed:
Nov. 25, 2005
Klaus Daut, Herzogenaurach, DE;
Klaus Daut, Herzogenaurach, DE;
Schaeffler KG, Herzogenaurach, DE;
Abstract
An electromagnetic hydraulic valve (), in particular proportional valve, for controlling a device for the rotational angle adjustment of a camshaft relative to a crankshaft of an internal combustion engine, composed of an electromagnet () with a hollow-cylindrical magnet housing (), at least one coil winding (), an axially moveable magnet armature (), a first and a second pole shoe (), a valve part () with a hollow-cylindrical valve housing () having a control piston () which can be moved axially by the magnet armature () of the electromagnet () via a plunger rod (). The invention consists of a sleeve (), composed of a base () and a hollow-cylindrical side wall (), which is arranged on that end of the control piston () and situated in the direction of the plunger rod (), where the sleeve () has a greater hardness than the control piston ().
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile