Asmo Co., Ltd.

Nippondenso Co., Ltd.

Takeshi Kamimura

Masaaki Kiyama

Toshihiro Satoh

Disclosed herein is a windscreen washer pump, which is suitable for use with a vehicle, of a type wherein washer fluid is forcibly pressurized by means of an impeller, to be supplied to a vehicle windscreen or the like. A plurality of supplemental vanes are provided between the impeller and an inlet for entry of the washer fluid. The plurality of supplemental vanes serve to introduce the washer fluid from the inlet into the impeller and forcibly pressurize the fluid from the impeller even in a case where air is mixed.

Windscreen washer pump for vehicle

A pump used to selectively force-feed under pressure washer fluid to the front and rear windscreens of a vehicle according to the rotation of an impeller in either one or other direction. A bypass flow passage for taking out part of the washer fluid, which is forcibly fed under pressure by means of the impeller, is formed upon supply of the washer fluid to the rear windscreen. Thus, the washer fluid delivered to the front windscreen and that delivered to the rear windscreen are different in the delivery rate.

A washer pump for an automobile includes a substantially circular pump chamber receiving concentrically therein an impeller and having an inlet aligned with the center of the impeller and first and second outlets defined in a sidewall of the pump chamber and extending tangentially to the sidewall, and a directional control valve including a valve chamber connected in fluid communication with the pump chamber through the first outlet and also through the second outlet, and a valve element movably disposed in the valve chamber for selectively connecting the first and second outlets, respectively, to first and second washer nozzles of the automobile. The washer pump further includes a projection disposed between the first and second outlets and projecting inwardly from the sidewall of the pump chamber toward the impeller for substantially blocking the flow of a cleaning fluid between the first and second outlets, thereby increasing the pressure difference between the first and second outlets.

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Hamamatsu, Japan

Takeshi Kamimura