Pumping system and pump therefor

Claim 1

IN A PUMPING SYSTEM FOR A DISHWASHER OR THE LIKE, A REVERSIBLE MOTOR HAVING A PAIR OF DRIVE SHAFT ENDS SIMULTANEOUSLY ROTATABLE IN THE SAME DIRECTION, FIRST AND SECOND PUMPS EACH HAVING A CASING PROVIDING A GENERALLY CIRCULAR CHAMBER HAVING AN AXIALLY ORIENTED INLET AND A TANGENTIALLY ORIENTED OUTLET, A DAM EXTENDING INWARDLY FROM THE CIRCUMFERENCE OF SAID CHAMBER ADJACENT SAID OUTLET, AN IMPELLER CONNECTED TO ONE OF SAID DRIVE SHAFT ENDS AND CONCENTRICALLY DISPOSED WITHIN SAID CHAMBER WITH ITS PERIPHERY IMMEDIATELY ADJACENT THE INNER EDGE OF THE DAM, SAID IMPELLER HAVING A PLURALITY OF ARCUATE BLADES HAVING THEIR INNER ENDS RADIALLY SPACED FROM THE IMPELLER AXIS FOR PUMPING FLUID THROUGH SAID CHAMBER ONLY DURING ROTATION OF THE IMPELLER IN A DIRECTION TO MOVE THE OUTER BLADE ENDS PAST THE OUTLET BEFORE SAID DAM, THE INLETS ON SAID PUMPS BEING CONNECTED TO SUMP MEANS ON SAID DISHWASHER OR THE LIKE AND THE OUTLWT ON SAID FIRST PUMP BEING CONNECTED TO FLUID INJECTION MEANS IN SAID DISHWASHER OR THE LIKE AND THE OUTLET ON SAID SECOND PUMP BEING CONNECTED TO A DRAIN, SAID PUMPS BEING OPPOSITELY ORIENTED WITH RESPECT TO EACH OTHER WHEREBY UPON ROTATION OF THE DRIVE SHAFT ENDS ON ONE DIRECTION SAID FIRST PUMP WILL PUMP FLUID FROM SAID SUMP MEANS TO SAID INJECTION NEANS AND SAID SECOND PUMP WILL BE INOPERATIVE AND UPON ROTATION OF SAID DRIVE SHAFT ENDS IN AN OPPOSITE DIRECTION SAID SECOND PUMP WILL PUMP FLUID FROM SAID SUMP MEANS TO SAID DRAIN AND SAID FIRST PUMP WILL REMAIN INOPERATIVE.