Lock-up clutch for a hydrodynamic torque converter

A lock-up clutch for a hydrodynamic torque converter, said clutch comprising

• a first converter component having at least one first friction area,
• a second converter component having at least one second friction area opposing said at least one first friction area, said first and second friction areas being movable into working connection by an axial engaging movement of said first and second components, said first and second friction areas being movable out of working connection by an axial disengaging movement in the opposite direction from said engaging movement, and
• a pump device comprising a geometric arrangement of said first and second components which is effective to build up a pressure gradient which produces a forced flow of hydraulic fluid through at least one predetermined section of at least one of said first and second friction areas when relative rotation occurs between the first and second converter components, said relative rotation causing said forced flow.