Patent · US Active

Coupling device

US7971697B2 · kind B2 · utility

5Cited by

3References

20Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Benjamin Kemmner · Baden-Baden, DE
Albrecht Schaefer · Uhingen, DE

Key dates

Filing date	Mar 9, 2005
Grant date	Jul 5, 2011
Priority date	—
Expiry date	Feb 2, 2027

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16D2048/0209
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A clutch device for a motor vehicle has friction elements around which coolant flows and which, by way of a piston, can be pressed against one another for torque transmission. The first piston side is acted on with operating pressure, and the second piston side is acted on with coolant pressure. A valve, by which the operating pressure can be set, and a device which makes a reaction of the coolant pressure on the operating pressure possible are provided. The device is designed as a hydraulic resistance cascade and is connected between coolant supply and coolant return lines of the friction elements. A return pressure line branches off in the center of the hydraulic resistance cascade and is connected to the valve.

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