Patent ID: 7029246
Filing Date: 2006-04-18
Classification: F04C

Abstract:
1. A magnetic drive pump comprising: a rotor shaft comprising a proximal end mateably and frictionally received within a proximal bushing and a distal end connected to a rotor, the rotor shaft passing through and being connected to an inner magnet assembly disposed between the proximal bushing and the rotor, the rotor shaft further passing through a distal bushing disposed between the inner magnet assembly and the rotor, the proximal bushing being received and supported within a proximal end of a canister that encloses the inner magnet assembly, wherein proximal end of the canister comprises a cup that encloses the proximal bushing and the proximal end of the rotor shaft, the proximal end of the canister being connected to a radial section that extends radially outwardly from the proximal end of the canister, the radial section of the canister being connected to an axial section of the canister that comprises a cylinder that extends axially around the inner magnet assembly and terminates at an open distal end that is connected to a casing, the casing comprising an axial passage in which the distal bushing is mateably received, the casing further defining a pump chamber in which the rotor and distal end of the rotor shaft are received, the axial passage of the casing extending from the open distal end of the canister to the pump chamber, wherein the rotor shaft also passes through two annular thrust washers that sandwich the distal bushing.