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. 13, 2012
Filed:
Dec. 19, 2008
Eugen Kremer, Bühl, DE;
Eric Müller, Kaiserslautern, DE;
Jochen Pfister, Strasbourg, FR;
Reinhard Stehr, Bühl, DE;
Ronald Glas, Obersasbach, DE;
Eugen Kremer, Bühl, DE;
Eric Müller, Kaiserslautern, DE;
Jochen Pfister, Strasbourg, FR;
Reinhard Stehr, Bühl, DE;
Ronald Glas, Obersasbach, DE;
Schaeffler Technologies AG & Co. KG, Herzogenaurach, DE;
Abstract
The invention relates to a hydraulic system for actuating a continuously variable belt-driven conical-pulley transmission having two conical pulleys encircled by an endless torque-transmitting means, each of which comprises two conical disks, one of which is axially movable depending on the pressure in an associated pressing chamber, and having a torque sensor which includes a torque sensing chamber that is connected to a hydraulic energy source and is linked with the pressing chambers. The invention is distinguished by the fact that the pressing chambers are connected via a first hydraulic resistance element to the torque sensing chamber, and via a second hydraulic resistance element to an additional pressure chamber, in which a lower pressure prevails than in the pressing chambers and/or the torque sensing chamber.