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:
Jun. 29, 2004
Filed:
Jan. 21, 2003
Andreas Gründl, München, DE;
Bernhard Hoffmann, Starnberg, DE;
Compact Dynamics GmbH, Starnberg, DE;
Abstract
The present invention relates to a gas exchange valve drive for a valve-controlled combustion engine with a hollow cylindrical rotor ( ) to be coupled with a valve member ( ) and a stator ( ), wherein the rotor ( ) comprises permanent-magnetic rings ( ) concentrically arranged one above the other, the stator ( ) is at least partially constructed of a soft magnetic material and comprises at least one tooth ( ) facing towards the rotor ( ), the stator ( ) comprises a radially inner magnetically conductive area ( ) and a radially outer magnetically conductive area ( ), with the rings ( ) of the rotor ( ) being arranged between the inner area ( ) and the outer area ( ) of the stator ( ), and the outer area ( ) of the stator ( ) in at least one partial section ( ) is designed with a C-shaped cross-section and comprises at least one stator coil ( ).