Patent ID: 6926131

Claim:
Hydrokinetic coupling apparatus, comprising: a casing ( 30 ) having a transverse wall ( 3 ) coupled in rotation to a driving shaft; a turbine wheel ( 12 ) mounted within the casing ( 30 ) and fixed to a hub ( 14 ) which is adapted to be coupled in rotation to a driven shaft; a fixed first surface ( 1 ) on the transverse wall ( 3 ) of the casing ( 30 ); a lock-up clutch interposed between said turbine wheel ( 12 ) and said transverse wall ( 3 ) and comprising a piston ( 4 ) carrying a second surface ( 2 ), which lies facing the first surface ( 1 ) for coupling the second surface ( 2 ) releasably to the transverse wall; and a friction means ( 60 ) acting between a face of the piston ( 4 ) opposite the second surface ( 2 ) and a radial plate ( 15 ) of the hub ( 14 ) situated in facing relationship thereto, wherein the piston ( 4 ) is mounted to rotate relative to the hub ( 14 ) and is so configured as to carry the friction means ( 60 ).