Pumping mechanism and pump inlet cover for use therein

Claim 1

A WASHING COMPARTMENT HAVING A SUMP IN THE BOTTOM THEREOF, AN OPENING IN THE BOTTOM OF THE SUMP, A PUMPING MECHANISM SUPPORTED IN THE SAID OPENING, SAID PUMPING MECHANISM INCLUDING A SINGLE DRIVE MOTOR, A VERTICAL SHAFT DRIVEN BY THE MOTOR, AN AXIAL FLOW PUMP SUPPORTED WITHIN THE SUMP AND HAVING AN IMPELLER MOUNTED ON THE TOP END OF THE MOTOR SHAFT, A VANE PUMP LOCATED BENEATH THE SUMP FOR USE IN DRAINING THE SUMP, THE VANE PUMP ALSO HAVING AN IMPELLER DRIVEN BY THE SAID MOTOR SHAFT, AND A PUMP INLET COVER SURROUNDING THE MOTOR SHAFT AND FIXED IN POSITION SLIGHTLY ABOVE THE BOTTOM OF THE SUMP, THE INLET FOR THE AXIAL FLOW PUMP BEING ABOVE THE PUMP INLET COVER WHILE THE INLET FOR THE VANE PUMP IS BELOW THE SAID INLET COVER, A SUPPLEMENTARY WASHING SYSTEM WITHIN THE COMPARTMENT, THE VANE PUMP HAVING TWO SEPARATELY CONTROLLED OUTLETS, A FIRST OUTLET CONNECTED WITH THE SUPPLEMENTARY WASHING SYSTEM AND A SECOND OUTLET FOR DRAINING THE SUMP OF LIQUID, SO THAT DURING ONE OPERATION OF THE PUMPING MECHANISM THE AXIAL FLOW PUMP RECIRCULATES LIQUID WITHIN THE COMPARTMENT WHILE THE VANE PUMP DELIVERS LIQUID THROUGH ITS FIRST OUTLET ONLY TO THE SUPPLEMENTARY WASHING SYSTEM, THE SECOND OPERATION OF THE PUMPING MECHANISM PREVENTING SAID AXIAL FLOW PUMP FROM RECIRCULATING LIQUID WITHIN SAID COMPARTMENT AND CAUSING THE VANE PUMP TO DELIVER LIQUID THROUGH ITS SECOND OUTLET FOR DRAINING THE SUMP COMPLETELY.