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. 13, 2004
Filed:
Jan. 31, 2003
Rainer Barth, Stuttgart, DE;
Oliver Fritz, Aichtal, DE;
Volker Korte, Bissingen, DE;
Martin Lechner, Stuttgart, DE;
Christoph Steinmetz, Ludwigsburg, DE;
Mahle Ventiltrieb GmbH, Stuttgart, DE;
Abstract
The aim of the invention is to functionally improve a hydraulic play compensation element for a valve gear of an internal combustion engine. To this end, the play compensation element is characterized by the following features. Both components ( ) enclose a pressure chamber ( ) between them, which is sealed from the exterior and which has a volume that depends on the relative position of both components ( ). A pressure spring ( ) that presses both components ( ) away from one another is mounted inside the pressure chamber ( ). The pressure chamber ( ) can be connected to the storage chamber ( ) via a spring-loaded one-way valve ( ) through which media can flow exclusively into the pressure space. An additional controllable stop valve ( ) is provided in the connection of the pressure chamber ( ) to the storage chamber ( ). A throttling channel ( ), which serves as a bypass to the one-way valve ( ), is provided between the pressure chamber ( ) and the controllable stop valve ( ). The throttling channel ( ) is connected to a reversibly size-changing buffer chamber ( ).