Pumps – Motor driven – Interrelated or common lubricating or cooling means for pump...
Patent
1989-04-28
1990-06-19
Fox, John C.
Pumps
Motor driven
Interrelated or common lubricating or cooling means for pump...
417902, F04B 3902
Patent
active
049349058
ABSTRACT:
A hermetic compressor assembly is disclosed including a motor-compressor unit disposed within a hermetically sealed housing, wherein the housing has an oil sump in the bottom thereof from which oil is drawn to lubricate the compressor mechanism. An electric drive motor includes a vertical rotor having a lower axial end adjacent the oil sump. An arc-shaped counterbalance weight and an annular plate member having a smooth bottom surface adjacent the oil sump are connected to the lower axial end of the rotor, whereby upon rotation of the rotor turbulence and resulting agitation of the oil in the oil sump are prevented. In one embodiment, the counterbalance weight and plate member are integrally formed. In other embodiments, the weight is disposed intermediate the rotor and a flat or dish-shaped plate member, which presents a smooth bottom surface adjacent the oil sump.
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Fox John C.
Tecumseh Products Company
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