Patent ID: 6074173
Filing Date: 2000-06-13
Classification: F04B

Abstract:
A compressor for a fluid, comprising:a compressor housing defining therein a crank chamber, a discharge chamber, and a suction chamber;a main shaft rotatably supported to said compressor housing;a swash plate disposed in said crank chamber and held to said main shaft to rotate together with said main shaft, said swash plate having an inclination variable relative to said main shaft;a piston responsive to a rotation of said swash plate for moving said fluid from said suction chamber to said discharge chamber with a variable displacement dependent on said inclination, said piston controlling said inclination in response to a first pressure differential between said crank chamber and said suction chamber;a first communication passage connected between said discharge chamber and said crank chamber for permitting said fluid to move between said discharge chamber and said crank chamber through said first communication passage;a first valve coupled to said first communication passage for controlling the movement of said fluid through said first communication passage;a second communication passage connected between said crank chamber and said suction chamber for permitting said fluid to move between said crank chamber and said suction chamber through said second communication passage; anda second valve coupled to said second communication passage for controlling the movement of said fluid through said second communication passage.