Patent ID: 7806673

Claim:
A gear pump, comprising: a central housing having a suction side, a discharge side, a top flange and a bottom flange; a drive gear assembly disposed in the central housing, the drive gear assembly comprising a drive shaft having a plurality of first gear flights extending therefrom; an idler gear assembly disposed in the central housing in operative relation to the drive gear assembly, the idler gear assembly comprising an idler shaft having a plurality of second gear flights; a first bearing having a pair of openings defined therein, the openings capable of receiving the drive shaft and idler shaft; a second bearing having a pair of openings defined therein, the openings capable of receiving the drive shaft and idler shaft; a gear insert disposed between the first and second bearings and sized to fit over the plurality of first and second gear flights, the gear insert having an inner wall disposed in spaced apart relation to the gear flights; a cover attached to the top flange of the central housing and enclosing the drive and idler gear assemblies; an adapter spool having a central opening for receiving a containment can, the adapter spool having a top flange and a bottom flange, the top flange capable of mating with the bottom flange of the central housing; a drive magnet assembly disposed in the adaptor spool; a driven magnet assembly disposed in the containment can in operative relation to the drive magnet assembly; and, an electric motor coupled to the drive magnet assembly; wherein the bearing has a fluid circulation groove with an inlet on a side facing at least one of the first and second bearings; wherein each opening in the bearing has a first inlet on a first side and a second inlet on a second side disposed opposite the first side, wherein the drive shaft has an odd number of flights such that one of the first and second inlets is covered when the other of the first and second inlets is uncovered.