Abstract: A rotary pump for liquid comprising a housing, a shaft carrying a motor rotor, a motor stator fixed in the housing and surrounding the rotary to rotate the rotor and shaft about an axis, where the shaft is mounted in the housing by axially spaced conical bearings each of which includes a first element fixed on the shaft with a first conical bearing surface concentric with the axis and a second journal element carried by the housing with a second conical bearing surface concentric with the axis and slidably engaging the first bearing surface. A biasing element forces the second elements or journal toward each other in an axial direction to compensate for wear between the friction surfaces.

Abstract: A rotary pump for liquid comprising a housing, a shaft carrying a motor rotor, a motor stator fixed in the housing and surrounding the rotor to rotate the rotor and shaft about an axis, where the shaft is mounted in the housing by axially spaced conical bearings each of which includes a first element fixed on the shaft with a first conical bearing surface concentric with the axis and a second journal element carried by the housing with a second conical bearing surface concentric with the axis and slidably engaging the first bearing surface. A biasing element forces the second elements or journals toward each other in an axial direction to compensate for wear between the friction surfaces.

Abstract: The present invention is directed to a pump system. The pump system has a motor, a pump shaft, a pumping section, a connecting column, and a shaft isolator. The motor drives the pump shaft and has a bottom surface above a desired medium. The pumping section has a top surface that receives the pump shaft and pumps the desired medium to a predetermined instrument. The connecting column surrounds a predetermined portion of the pump shaft and connects the motor support and pumping section together. The shaft isolator is positioned between the connecting column and the pump shaft, and extends from the top surface of the pumping section to a predetermined height above the desired medium and below the bottom surface of the motor. The resulting pumped medium has an acceptable amount of entrained air that will not adversely affect the predetermined instrument.