Patent ID: 8360725

Claim:
A cooling passage arrangement inside a hollow-cast cast part, comprising: a flow region, which is delimited by at least two spaced apart cast-part walls, for a cooling medium; at least one line of ribs connected to the two cast-part walls and being configured to divide the flow region in a flow direction into two cooling passages; and at least one gap arranged along the at least one line of ribs, wherein: two rib ends face each other and are spaced from each other by the at least one gap; one of the two rib ends has a contour in the style of a wish bone -Y-cross section and another one of the two rib ends being substantially elongate; and the contour in the style of a wish bone -Y-cross section has an extent transversely to a longitudinal extent of the at least one line of ribs which corresponds to at least 1.5 times a width which is to be assigned to the at least one line of ribs.