Patent ID: 7178450
Filing Date: 2007-02-20
Classification: F04B

Abstract:
1. A compressor comprising; a housing, a drive shaft supported by said housing and rotatable around an axis thereby generating a centrifugal force, said shaft presenting an annular wall defining a pocket and a bottom portion for receiving a pressurized fluid and a top portion for holding a lubricant, said drive shaft and said housing forming a fluid jacket therebetween for holding the pressurized fluid therein, an actuator disposed annularly about said drive shaft and movable relative to said housing for generating pressure inside said housing, a pair of sealing lip portions disposed between said housing and said drive shaft and circumscribing said drive shaft for defining an annular lubricating and sealing ring between said sealing lip portions, said drive shaft defining a first channel extending through said drive shaft between said top portion of said pocket and said lubricating ring between said sealing lip portions, and said drive shaft defining a second channel extending from said bottom portion of said pocket to said fluid jacket to force the pressurized fluid against the lubricant for pushing the lubricant through said first channel and between said sealing lip portions thereby constantly lubricating and sealing said partially spaced sealing lip portions.