Patent ID: 7926635

Claim:
A piston assembly ( 14 ) for arrangement in a first pressure cavity ( 5 ) of a force transfer device ( 1 ) for operating a first actuatable clutch device and a second actuatable clutch device ( 3 , 4 ), comprising a first piston element and a second piston element ( 9 , 10 ), said piston elements associated respectively with said first and second actuatable clutch devices ( 3 , 4 ), wherein said second piston element ( 10 ) of said second clutch device ( 4 ) is guided axially by said first piston element ( 9 ) of said first clutch device ( 3 ) and movable against a stop ( 13 ), wherein a second pressure cavity ( 12 ) is formed between the first and second piston elements and loadable with pressure medium, wherein said first piston element ( 9 ) is movable in an axial direction, relative to said second piston element ( 10 ) of said second clutch device ( 4 ), and wherein said first and second clutch devices are simultaneously engageable based on a pressure difference between said first pressure cavity and said second pressure cavity.