Patent ID: 7828530
Filing Date: 2010-11-09
Classification: E04H,F04D

Abstract:
1. Electrically driven pump for the maintenance of swimming pools in combination with a swimming pool filter and a swimming pool cleaning device, comprising: an electric motor having a drive shaft with axial ends, a first shaft output at a first of the axial ends, a second shaft output at a second of the axial ends, a first pump impeller at the first axial end and driven by the first shaft output, the first impeller operating at a low pressure and high flow rate, the first impeller having a first outlet and a second outlet to an exterior of the pump, a second pump impeller at the second axial end and driven by the second shaft output, the second impeller operating at a higher pressure and lower flow rate as compared to the first impeller, the second impeller having an inlet and a first outlet to the exterior of the pump, wherein the first outlet of the first impeller is connected to the inlet of the second impeller and delivers low pressure water to the inlet of the of the second impeller so that the water flows from a region of low pressure toward a region of higher pressure, wherein the second outlet of the first impeller and the first outlet of the second impeller are separate outlets to the exterior of the pump, wherein the second outlet of the first impeller is connected to an inlet of the filter, and wherein the first outlet of the second impeller is connected to an inlet of the cleaning device.