Patent ID: 7392889
Filing Date: 2008-07-01
Classification: F16D,F16H

Abstract:
1. A hydrodynamic clutch device comprising: a clutch housing connected to a drive; a pump wheel connected to the clutch housing, the pump wheel having a hub; a turbine wheel connected to a takeoff, the turbine wheel and the pump wheel forming a hydrodynamic circuit; a bridging clutch essentially surrounded by the hydrodynamic circuit, the bridging clutch comprising a piston and at least one friction surface which can be acted on by the piston to connect the drive to the takeoff independently of the hydrodynamic circuit, the piston having one surface facing the at least one friction surface and an opposite surface; a pressure space for exerting fluid pressure on the piston, wherein the pressure space is bounded axially by first, second, and third walls, the first wall being formed by the clutch housing, the second wall being the one surface of the piston, the third wall being fixed to the first wall in a pressure-tight manner; a pressure circuit comprising a first pressure medium line to supply the hydrodynamic circuit with clutch fluid and a second pressure medium line to supply the pressure space with clutch fluid; a seal which is effective between the second and third walls to at least substantially reduce exchange of fluid between the hydrodynamic circuit and the pressure space; and a throttle which allows a defined exchange of fluid between the hydrodynamic circuit and the pressure space, the throttle being formed in the third wall.