Patent ID: 7758323
Filing Date: 2010-07-20
Classification: D06F,F04D

Abstract:
1. A drain pump for home appliances that comprises a motor with a turning shaft, said motor comprising a fixed stator and a rotor linked to said turning shaft, an impeller connected to said turning shaft, and a hydraulic body in which said impeller is housed, said hydraulic body comprising an inlet conduit and an outlet conduit, the motor comprising actuating means to block one of said conduits when said motor is not being powered, said actuating means axially moving the turning shaft along with the impeller when there is no power running to the motor, said impeller blocking the inlet conduit, the actuating means comprising a fixed part and a moving part, a magnetic field being generated that keeps said fixed part and said moving part connected or next to each other when there is electrical power, and the motor also comprising recovery means that separate the fixed part and the moving part when there is no electrical power, said moving part moving the turning shaft axially, the actuating means also comprising an auxiliary stator with an auxiliary winding, and the fixed part and the moving part of the actuating means operate as magnetic nuclei, the auxiliary winding generating the magnetic field that keeps the moving part connected or next to the fixed part.