Abstract: An adapter for coupling a motor to a pump includes a collar having a first end being removably coupled to a motor housing and a second end being removably coupled to a pump housing of differing size. The collar forms an internal cavity. The drive coupler further includes a drive coupler disposed within the internal cavity, coaxially aligned with the collar. The adapter further includes a motor shaft portion on the drive coupler being configured to engage a motor shaft on a first end, and being configured to engage a pump shaft on a second end. The drive coupler is configured to engage a motor shaft and pump shaft of differing diameters.

Abstract: A device for pumping molten metal that eliminates rotor bearing members comprises a pump having a pump chamber including a first bearing surface, and a monolithic rotor having a second bearing surface that aligns with the first bearing surface. The second bearing surface is formed of and integral with the material forming the rotor. Preferably a rigid rotor shaft to motor shaft connection is utilized to rigidly center the rotor within the pump chamber and, hence, within the first bearing surface.

Abstract: Since a reduction gearbox (50) is mounted onto the outer wall of the discharge elbow (30), the installation height of a vertical axis pump is reduced. A pump shaft (34) comes out the outer wall of the discharge elbow (30) and passes through a separate wall (36) provided above the outer wall of the discharge elbow (30). An air space (40) is formed between the separate wall (36) and the outer wall of the discharge elbow (30). The air space (40) is open through and through to the atmosphere. A casing (76) for the reduction gearbox (50) is formed including the separate wall (36) and the outer wall of the discharge elbow (30). The reduction gearbox (50) is mounted onto the discharge elbow (30) in a one-piece construction. An output stage gear (54) of a gear train of the reduction gearbox (50) is mounted onto the pump shaft (34) comes out through the outer wall of the discharge elbow (30). An input shaft (52) of the reduction gearbox (50) comes out in the horizontal direction and is connected to a driver (86).

Abstract: A filtering pump assembly for pumping and filtering a fluid includes a pump subassembly and a filter subassembly. The pump subassembly has an inlet portion with a first cross-sectional shape. The preferred cross-sectional shape of the inlet portion is circular. The filter subassembly includes a foraminous cage member, having an opening formed therein of a shape corresponding to the first cross-sectional shape of the inlet portion and being configured to fit engagably thereon. The filter subassembly also includes a filter element formed of a porous material for placement in covering relation to the cage member. The preferred filter element is either bag-shaped or formed as a cylindrical sleeve. Preferably, the filter assembly includes a retainer for retaining the filter element in covering relation to the cage member. The retainer may be an annular spring clip having two ends which overlap one another, and having a finger grip formed at each end thereof.