Patent ID: 8408885

Claim:
A washer fluid pump for a window cleaning system of a motor vehicle comprising: a housing with an electromotive drive which is arranged in the housing, a washer fluid pump unit which can be driven by the electromotive drive, an inner opening which is arranged on the inner side of the housing, a ventilation duct leading from the inner opening and terminating at a first end at a first ventilation opening in the housing and at a second end at a second ventilation opening in the housing, the ventilation duct defining a direct, constant-shape, generally straight-line passage extending from the first ventilation opening to the second ventilation opening in a direction substantially perpendicular to a radius of the housing and perpendicular to an axial length of the housing and allowing fluid flow from the first ventilation opening to the second ventilation opening, and a bulkhead positioned radially outward from the ventilation duct such that the bulkhead at least partially covers the ventilation duct, wherein an exterior of the housing defines a convex outer surface facing radially outward, and wherein the bulkhead has a convex outer surface facing radially outward that matches and forms a portion of the convex outer surface defined by the exterior of the housing, and an inner surface facing radially inward that defines a wall of the ventilation duct.