Abstract: A method of manufacturing a pump impeller and a pump impeller which is constructed primarily in a single molding operation. The pump impeller has a shroud which includes an inlet opening located on one side of a series of vanes. On the opposite side of the series of vanes is a hub and from the hub extends a shaft sleeve. The axis of rotation of the shaft sleeve aligns with the longitudinal center axis of the inlet opening.

Abstract: A pump which is designed to be mounted within a recirculating water system where a portion of the recirculating water is diverted (bypass water) and cause to flow through the motor chamber with this recirculating water to absorb heat that is produced during the operation of the motor. The heated bypass water is then added back to the recirculating water. The pump includes an electric motor which is mounted within a pump motor chamber of a motor housing and is completely enclosed therein. The pump motor chamber is filled with oil thereby submerging of the electric motor in oil. A water conducting tube is mounted within the pump motor chamber and surrounds the electric motor. The tube inlets water from the pressure side of the pump impeller, conducts this bypass water entirely through the tube and then discharges the bypass water into the inlet of the recirculating water to the pump impeller.

Abstract: An identification and information system for establishing a nexus between discrete entities includes primary and secondary information regarding primary and secondary entities borne by primary and secondary information means. The primary and secondary information may be encoded for mechanical reading which establishes the nexus between said primary and secondary entities.