Patent ID: 8851257

Claim:
A fluid accumulator chamber ( 1 ) of a fluid clutch device having a continuous circular inner boundary wall ( 2 ) which runs around a central axis of rotation (M), having a concentric continuous circular outer boundary wall ( 3 ) which runs around a central axis of rotation (M), and having at least one filling opening ( 4 ) arranged in said outer boundary wall ( 3 ), wherein the outer boundary wall ( 3 ) has, at the location of the filling opening ( 4 ), a maximum spacing (R 1 ) to the central axis (M), which spacing decreases continuously to a point (P) of minimum spacing (R 3 ) to the central axis (M); wherein for each filling opening there is a said point (P) of minimum spacing (R 3 ) offset with respect to the filling opening ( 4 ) by substantially about 180°.