Patent ID: 6402480
Filing Date: 2002-06-11
Classification: F04B

Abstract:
A variable displacement swash plate type compressor comprising:a cylinder block having a plurality of cylinders arranged radially therein; a piston reciprocatively disposed in each of the cylinders of said cylinder block; a cylinder head attached to said cylinder block and having a discharge chamber and a suction chamber formed therein; a crankcase attached to said cylinder block to define a crank chamber; an orifice tube formed in said cylinder block, said orifice tube providing fluid communication between the crank chamber and the suction chamber; a drive shaft rotatably supported by said crankcase and said cylinder block; a swash plate adapted to be driven by said drive shaft and having a central aperture for receiving said drive shaft, radially outwardly extending side walls, and a peripheral edge; and a lubrication passage formed within said drive shaft providing fluid communication between the discharge chamber and the crank chamber, wherein said lubrication passage includes a control valve for selectively opening and closing said lubrication passage.