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. 17, 2009
Filed:
Jun. 19, 2007
Markus Lettmann, Kieselbronn, DE;
Falk Schneider, Korntal-Münchingen, DE;
Markus Lettmann, Kieselbronn, DE;
Falk Schneider, Korntal-Münchingen, DE;
MAHLE International GmbH, Stuttgart, DE;
Abstract
The present invention relates to an adjustable camshaft in which an inside shaft and an outside shaft, each being fixedly connected to cams, are mounted so they are rotatable in relation to one another. To produce the relative movement, a hydraulic adjusting mechanism is provided on one of the ends thereof; in the adjusting mechanism, first and second rotatable adjusting elements are each fixedly connected to one of the two shafts opposite one another. Adjacent to the adjusting mechanism, the outside shaft is fixedly connected to a first bearing ring supporting at least the outside shaft in a stationary first abutment. Alternatively, it is essential to the present invention either that the first adjusting element is supplied with hydraulic medium via hydraulic channels running in a second abutment and a second bearing ring or a pressure bearing disk is provided with corresponding hydraulic channels between the adjusting mechanism and the first abutment, the hydraulic channels supplying hydraulic medium to the second adjusting element.