Patent ID: 7117986

Claim:
Thrust bearing ( 10 ) for a clutch of a motor vehicle, comprising an axially movable piston ( 14 ), and a ring ( 26 I), integral with a bearing race (C 1 ) hooked onto the piston ( 14 ) by the use of elastic pinching means with an axial effect ( 38 , 40 ) including an annular attachment ( 40 ), the ring ( 26 I) being equipped with a proximal face (F 1 , 62 ) and with a distal face (F 2 , 70 ) which is arranged axially after the proximal face (F 1 , 62 ), the proximal face (F 1 , 62 ) bearing on a first hooking face (A 1 , 64 ) formed in the piston ( 14 ), the pinching means ( 38 , 40 ) bearing on the distal face (F 2 , 70 ) of the ring ( 26 I) and a second hooking face (A 2 , 76 ) formed in the piston ( 14 ), wherein the first (A 1 , 64 ) and second (A 2 , 76 ) hooking faces formed in the piston ( 14 ) are arranged axially in front of the distal face (F 2 , 70 ) of the ring ( 26 I), wherein the annular attachment ( 40 ) has proximal hooking claws ( 44 ) bearing on the second hooking face (A 2 , 76 ) formed in the piston ( 14 ), wherein the piston ( 14 ) is equipped with axial piercings ( 46 ) for the hooking claws ( 44 ) to pass through, opening out into the second hooking face (A 2 , 76 ) formed in the piston ( 14 ), and wherein the first hooking face (A 1 , 64 ) is delimited by a shoulder ( 66 ) formed in a distal end segment ( 68 ) of the piston ( 14 ), and wherein the distal end segment ( 68 ) of the piston ( 14 ), in its peripheral axial surface ( 82 ) opening out into its distal-end transverse surface ( 14 D, 84 ), in line with each axial piercing ( 46 ), includes a mounting notch ( 86 ) which is intended axially to receive the associated hooking claw ( 44 ), so as to allow angular indexing of the piston ( 14 ) with regard to the hooking claws ( 44 ), in the course of its assembly with the annular attachment ( 40 ).