Patent ID: 6896481
Filing Date: 2005-05-24
Classification: A47L,D06F,F04D

Abstract:
1. A water pump comprising: a motor having a shaft; a first enclosure member adjacent to said motor, said first enclosure member having an exterior, an internal cavity and a bore extending from said internal cavity to the exterior of said first enclosure member; a second enclosure member adjacent to said first enclosure member, said second enclosure member having a central portion; and an impeller mounted in said internal cavity, said impeller connected to amid shaft for rotation within said first enclosure member, said central portion having a first axial position with the central portion adjacent the impeller and a second axial position with the central portion spaced from the impeller to define a predetermined gap between said impeller and said central portion, and with said central portion being biased to move from the first axial position to the second axial position.