Patent ID: 6837349

Claim:
A hydrodynamic clutch comprising: a drive element which can be connected to a drive shaft so as to be fixed against rotation relative to said drive shaft, said drive shaft having an axis of rotation; an impeller wheel connected to said drive element so as to be fixed against rotation relative to said drive element; a turbine wheel which can be connected to a driven shaft so as to be fixed against rotation relative to said driven shaft, wherein said turbine wheel can be hydrodynamically driven by said impeller wheel, a lock-up clutch which can couple said turbine wheel to said impeller wheel; an actuation piston associated with said lock-up clutch; a piston space between said actuation piston and said drive element; and a hub part having an axially central recess which receives said driven shaft and a plurality of fluid channels for conveying hydraulic fluid from said driven shaft to said piston space, each said fluid channel having an inner portion which extends substantially axially, each said inner portion being bounded radially inside by said recess and being open facing the driven shaft.