Dual output window washer pump for an automotive vehicle

A dual outlet washer pump for an automotive vehicle to alternately supply a stream of washer fluid to separate locations, the pump comprising:

• a pump casing;
• a reversible motor mounted in the pump casing for rotating an impeller shaft;
• a pumping chamber in the pump casing;
• an impeller mounted to the impeller shaft in the pumping chamber for rotation in a first direction and in a second direction;
• a discharge section in direct fluid communication with the pumping chamber;
• first and second discharge ports in a lateral surface of the discharge section for communicating the discharge section through first and second outlet conduits, respectively, to first and second outlets;
• a valve element having a frame portion surrounding a flat, flexible membrane mounted in vertically planar fashion in the discharge section and movable from a center position unobstructing either of the discharge ports to a first position in which fluid flow from the pumping chamber entering a first discharge side of the discharge section directly impacts a first side of the membrane causing flexure thereof away from the first discharge port to allow fluid flow therethrough and concurrently causing contact of a second side of the membrane with an inner lateral side of the discharge section adjacent the second discharge port to block fluid flow therethrough, and to a second position in which fluid flow from the pumping chamber entering a second discharge side of the discharge section directly impacts a second side of the membrane causing flexure thereof away from the second discharge port to allow fluid flow therethrough and concurrently causing contact of a first membrane side of the membrane with an inner lateral side of the discharge section adjacent the first discharge port to block fluid flow therethrough;
• and
• a valve bracket mounted in the discharge section for slidably receiving the valve element in press-fit fashion therein.

A washer pump for an automotive vehicle, comprising:

• a pump casing;
• a reversible motor mounted in the pump casing for rotating an impeller shaft;
• a pumping chamber in the pump casing;
• an impeller mounted to the impeller shaft in the pumping chamber for bidirectional rotation therein;
• a discharge section in direct fluid communication with the pumping chamber;
• first and second discharge ports communicating the discharge section through first and second outlet conduits, respectively;
• and
• a valve element vertically mounted in the discharge section for alternately opening and closing the first and second discharge ports in response to a pressure differential across the valve element created by the directional rotation of the impeller, the valve element having a frame portion surrounding a substantially flat, flexible membrane, the membrane contacting an inner lateral surface of the discharge section to close one or the other of the first and second discharge ports.