Patent · US Active

Hydraulic system

US8133141B2 · kind B2 · utility

2Cited by

6References

27Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Eugen Kremer · Laufenburg (Baden), DE
Eric Muller · Contz-les-Bains, FR
Jochen Pfister · Strasbourg, FR
Reinhard Stehr · Bogen, DE
Ronald Glas · Braunschweig, DE

Key dates

Filing date	Dec 19, 2008
Grant date	Mar 13, 2012
Priority date	—
Expiry date	Apr 1, 2030

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H59/14
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.