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:
Jul. 25, 2006
Filed:
Nov. 30, 2004
Martin Rauch, Bamberg, DE;
Michael Haas, Weisendorf, DE;
Martin Rauch, Bamberg, DE;
Michael Haas, Weisendorf, DE;
INA-Schaeffler KG, Herzogenaurach, DE;
Abstract
A hydraulically actuated, preferably variable, valve drive of an internal-combustion engine is provided, with a slave unit (), which is embodied as a separate component relative to a master unit. A special characteristic is that the slave unit is provided with a hydraulic backlash compensation element (), which is connected to a path () for feeding hydraulic medium only outside of a stroke phase of a slave piston (). As a result, on one hand an easy-to-produce valve drive with slave unit () is provided. On the other hand, unnecessary 'pumping up' of the backlash compensation element () during the stroke phases of the slave piston () is prevented by the previously mentioned admission of hydraulic medium.