Patent ID: 8087506

Claim:
A multi-disk brake ( 1 ) in an automatic transmission, the disk brake ( 1 ) comprising an inner disk carrier ( 4 ) with inner disks ( 3 ) and an outer disk carrier ( 6 ) with outer disks ( 5 ), the inner disks ( 3 ) and the outer disks ( 5 ) are axially alternately arranged on the inner and the outer disk carriers ( 4 , 6 ), at least one of the inner disks ( 3 ) and the outer disk ( 5 ) have friction linings ( 7 ), a pressure actuated piston ( 10 ) of a piston-cylinder acting on the inner disks ( 3 ) and the outer disks ( 5 ) to apply a force and engage the multi-disk brake ( 1 ), one of an end disk ( 9 ) or a support disk ( 11 ) remote from the piston ( 10 ) forms an axial abutment for a disk set ( 14 ), which is formed by the inner disks ( 3 ), the outer disks ( 5 ), the end disk ( 9 ) and the support disk ( 11 ), at least one of the multi-disk brake ( 1 ) and adjacent components are designed to wet the disk set ( 14 ) with cooling oil; when the multi-disk brake ( 1 ) is disengaged, the cooling oil ( 13 ) flows from radially inside the multi-disk brake ( 1 ) through the multi-disk brake ( 1 ) and then radially outwardly through at least one radial opening ( 16 ) in the outer disk carrier ( 6 ); when the multi-disk brake ( 1 ) is one of engaged or partially engaged, the cooling oil ( 13 ) flows from radially outside the multi-disk brake ( 1 ) through the at least one radial opening ( 16 ) in the outer disk carrier ( 6 ) and then radially inwardly through the multi-disk brake ( 1 ); and the multi-disk brake ( 1 ) is sealed in an axial direction to prevent leakage of the cooling oil.