General Electric Company

Robert J Alvarez

Julius B Horvay

Owen H Scheldorf

A method is disclosed of counteracting the tendency for oil to enter a compressor motor air gap. The method includes the provision of means that interrupt the normally smooth surface of a rotor to which oil would otherwise adhere. Either alternatively or additionally, a sweeping action is carried out for moving oil to stator slots adjacent to the motor air gap and thus out of the air gap. Departure from conventional rotor construction includes providing one or more grooves along the surface of the rotor. Grooves may be cut into rotor surfaces by a file or ball end mill. In other forms, grooves or dents may be coined or otherwise pressed into the rotor; or such grooves may be provided as a result of the configuration of the individual rotor laminations. The grooves may be disposed parallel to the rotor axis or disposed spiralled (clockwise and counterclockwise); and either one or a plurality of grooves may be provided.

Apparatus and methods for controlling oil flow in electric motor air

A household refrigerator has a compartment divided into a freezer portion and a fresh food portion. Instead of a solid partition, a moving invisible layer of air isolates the two portions from each other.

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Louisville, KY, United States of America

Robert J Alvarez