Patent ID: 6119304
Filing Date: 2000-09-19
Classification: A47L,F04D,F16K

Abstract:
A vacuum cleaner comprising:a tank having an inlet for receiving liquid material and defining an interior;a powered pump defining a pump interior;a pump inlet disposed in the interior of the tank and in fluid communication with the pump, wherein the pump inlet places the interior of the pump in fluid communication with the interior of the tank;an air impeller assembly disposed in air flow communication with the interior of the tank, the air impeller assembly includes a housing and a driven air impeller disposed in the housing, the housing defines an opening in air flow communication with the interior of the tank and the air impeller defines an interior space, wherein the driven impeller creates a relatively low pressure area in the interior of the tank and in the interior space defined by the air impeller; anda priming apparatus disposed between the air impeller and the pump, wherein the priming apparatus places the interior of the pump in air flow communication with the low pressure area generated in the interior space defined by the air impeller and creates a low pressure area in the pump inlet and the pump is primed when the liquid material received by the tank is drawn through the pump inlet and into the pump interior.