Patent ID: 7001063
Filing Date: 2006-02-21
Classification: B08B,H02K

Abstract:
1. A drive system for driving a mixer impeller shaft in a vessel, the drive system comprising: a motor; an outer magnet rotor driven by the motor and a gear reducer; a bearing housing mountable to the vessel; a drive shaft rotatable in the bearing housing; an inner magnet rotor connected to the drive shaft; a manifold plate connected to the bearing housing; a canister connected to the manifold plate; a chamber defined in the bearing housing and having an inlet port for directing fluids into the chamber; a plurality of first ports through the manifold plate for providing fluid communication from the chamber to the inside of the canister; and a plurality of second ports through the inner magnet rotor for providing fluid communication from the inside of the canister through the inner magnet rotor, whereby a fluid path is provided from the chamber through the first ports, around the inner magnet motor, and through the second ports of the inner magnet rotor, which fluid paths is sealed from the environment from the canister.