Patent ID: 6050783
Filing Date: 2000-04-18
Classification: F04B

Abstract:
A reciprocating compressor comprising:a cylinder block having a cylinder bore and a bearing hole;a piston disposed in said cylinder bore;a front housing placed at one end of said cylinder block in an axial direction to define a crank chamber in cooperation with said cylinder block;a drive shaft penetrating said front housing and driven to have a rotary motion;a block-side bearing supporting said drive shaft in said bearing hole;a swash-plate element placed in said crank chamber and responsive to said rotary motion of the drive shaft for making said piston have a reciprocating motion within said cylinder bore;a rear member placed at another end of said cylinder block in said axial direction and having a discharge chamber and a suction chamber which are communicable with said cylinder bore in response to said reciprocating motion of the piston; anda gas return path connected to said bearing hole and said suction chamber for returning a blowby gas, which leaks into said crank chamber from said bore, back into said suction chamber through a gap left between said drive shaft and said block-side bearing, wherein said bearing hole directly communicates with said crank chamber.