Patent ID: 6431841
Filing Date: 2002-08-13
Classification: F04B

Abstract:
A compressor comprising:a main shaft which is input from front side with a driving force from a power source so as to rotate; a front housing, which has a shaft aperture that rotatably supports the front side of said main shaft; a cylinder block which has a shaft aperture that is located on the rear side of said front housing and rotatably supports the rear side of said main shaft, and cylinders that are disposed in parallel to said shaft aperture on the outer circumferential side of said shaft aperture; a rear housing which has a suction chamber and a discharge chamber that are disposed on the rear side of said cylinder block and can communicate with the inside of said cylinders; pistons which are reciprocatably inserted into said cylinders; a suction valve which is interposed between said cylinder block and said rear housing and only allows a gas to be drawn from said suction chamber into said cylinders; a discharge valve which is interposed between said cylinder block and said rear housing and only allows the gas to be discharged from the inside of said cylinders to said discharge chamber; a swash plate which oscillates in conjunction with the rotation of said main shaft and can reciprocate said pistons; and a coil spring which is disposed on the rear side of said main shaft and biases said main shaft from the rear side to the front side; wherein, the rear housing includes a recess or a seat portion which defines at least a part of a spring chamber that accommodates the coil spring.