Patent ID: 9726178
Date: 2017-08-08
CPC Classifications: F01P,F04D

Claim:
1. A mechanical coolant pump for an internal combustion engine, the mechanical coolant pump comprising: an outlet volute; an impeller pump wheel configured to pump an incoming liquid coolant in an axial direction radially into the outlet volute; a pump housing comprising an outlet volute housing which defines a first outlet channel comprising a valve opening, the pump housing being configured to define the outlet volute, the valve opening being defined by and surrounded by a valve seat which defines a valve seat plane and a symmetry plane, the symmetry plane being arranged in the middle of and perpendicular to the valve seat plane; an outlet valve arrangement arranged in the first outlet channel, the outlet valve arrangement comprising a valve flap configured to pivot between an open position and a closed position so as to open or close the valve opening of the first outlet channel; and a base disk comprising a proximal surface, wherein, the valve flap comprises at least one axial end and a flap seat configured to correspond to the valve seat, the at least one axial end of the valve flap is fixed to the base disk so that the proximal surface lies in a plane of the first outlet channel, the valve flap is configured to rotate around a pivot axis which is parallel to the symmetry plane and which is arranged so as to have a lateral eccentricity from the symmetry plane, the lateral eccentricity being between 1/20 and 1/1 of a distance of the pivot axis to the valve seat plane when the valve flap is in the open position, and the base disk is arranged so as to be perpendicular to the pivot axis.