Patent ID: 6200108
Filing Date: 2001-03-13
Classification: A61H,F04D,H02K

Abstract:
A pump for use in a recirculating water system comprising:an electric motor having an output shaft, said output shaft having a rotational axis, an impeller connected to said output shaft, said impeller located in an impeller chamber, rotation of said impeller results in liquid flowing through said impeller chamber from an inlet to an outlet, rotation of said impeller moves the liquid toward said outlet creating a pressurized environment within said impeller chamber;a pump motor housing having a pump motor chamber with said electric motor being located within said pump motor chamber, said impeller located exteriorly of said pump motor chamber, a tube located within said pump motor chamber, said tube being capable of conducting liquid from said pressurized environment through an outlet connection to said inlet, whereby said liquid within said tube is to absorb heat from said electric motor resulting in heating of said liquid and then result in discharging of the liquid in said tube into said inlet; andsaid tube forming a plurality of U-shaped sections, each said U-shaped section having a pair of legs, each said leg located parallel to said rotational axis whereby the configuration of said tube will allow complete draining of liquid from within said tube by gravity.