Dishw ashing machine

Claim 1

IN COMBINATION, A DISHWASHER COMPRISING A CABINET DEFINING A DISHWASHING CHAMBER, SPRAY MEANS IN SAID CHAMBER, SAID CHAMBER HAVING A SUMP MEANS, SAID SUMP MEANS HAVING WALL MEANS DEFINING AN OPENING, PUMP MEANS HAVING ONLY A SINGLE INLET MEANS CONNECTED TO SAID OPENING, SAID PUMP MEANS HAVING A WATER RECIRCULATING VOLUTE AND A WATER DRAIN VOLUTE, CONDUIT MEANS CONNECTED FROM SAID WATER RECIRCULATING VOLUTE TO SAID SPRAY MEANS, A SINGLE IMPELLER FOR SAID PUMP MEANS INTERPOSED BETWEEN SAID WATER RECIRCULATING VOLUTE AND SAID DRAIN VOLUTE, AND SELECTIVELY REVERSIBLE MEANS FOR ROTATING SAID IMPELLER IN ONE DIRECTION TO PUMP WATER ENTERING BY WAY OF SAID SINGLE INLET MEANS TO SAID SPRAY MEANS AND TO CLOSE EFFECTIVELY SAID DRAIN VOLUTE AND FOR ROTATING SAID IMPELLER IN THE OPPOSITE DIRECTION TO PUMP SAID WATER ENTERING BY WAY OF SAID SINGLE INLET MEANS TO SAID DRAIN.