Patent ID: 8118566
Filing Date: 2012-02-21
Classification: F04B

Abstract:
1. A piston-type compressor, comprising: a housing; pistons that reciprocally slide within cylinders formed at said housing; a shaft that passes through a crankcase formed inside said housing and is rotatably supported at said housing; a swashplate that is housed inside said crankcase and is caused to rotate by the rotation of said shaft to induce reciprocal movement of said pistons; and an intake port and an outlet port both formed at said housing through which a working fluid is taken in and is let out, with working fluid having been taken in through said intake port guided into said cylinders to be compressed by said pistons and then let out through said outlet port, characterized in: that said compressor includes at least an axial hole formed in said shaft to range along the axial direction and a radial hole communicating with said axial hole and ranging along the radial direction at said shaft to open into said crankcase; that said compressor includes a first intake passage through which working fluid having flowed in through said intake port is guided to said radial hole and said axial hole via said crankcase and a second intake passage through working fluid having flowed in through said intake port travels by bypassing said crankcase to join working fluid having been guided into said first intake passage; and that working fluid is taken into said cylinders from a joining area where first working fluid and second working fluid join each other.