Bearing protection device for liquid aerators

摘要

An apparatus for the treatment of liquid by aeration is provided. The apparatus has a motor, a propeller carried by a motor-driven shaft, an airflow passage to the propeller, and bearings supporting the shaft at at least one location spaced from the motor. In accordance with the present invention, an air pocket is established about at least one of the bearings for keeping liquid from the bearings as by a conical member extending over the shaft from the bearing.