Patent ID: 7179063

Claim:
Reciprocating-piston machine, in particular a refrigerant compressor ( 1 ) for a motor vehicle air-conditioning system, comprising a machine shaft ( 2 ) rotatably supported in a machine housing, a plurality of pistons ( 4 ) arranged circularly around said machine shaft ( 2 ) in said machine housing ( 3 ), an annular pivoting disc ( 5 ) driven by the machine shaft ( 2 ) and engaging said pistons via joint arrangement ( 6 ), a driver ( 7 ) mounted on said machine shaft and being connected to said pivoting disc in an articulated manner for transmitting the drive forces to said pivoting disc ( 3 ) and a sliding body ( 9 ) axially movably supported on said machine shaft, said pivoting disc ( 5 ) being supported on said sliding body pivotably about a hinge axis ( 8 ) oriented transversely to the machine shaft, said sliding body ( 9 ) including an axially extending recess receiving said driver and being provided at its inside facing the machine shaft ( 2 ) with a cavity ( 17 ), which is in communication with a bore forming a discharge passage ( 24 , 25 , 26 ) extending through the machine shaft ( 2 ).