Patent ID: 6283722
Filing Date: 2001-09-04
Classification: F04B

Abstract:
A variable displacement type compressor comprising:a crank chamber;a drive shaft rotatably supported in the crank chamber;pistons for performing a compressing operation;a cam plate, located in the crank chamber and coupled to the pistons for converting rotation of drive shaft to a reciprocal motion of the pistons, the stroke of which depends on the inclination angle of said cam plate, which varies according to the pressure in said crank chamber; anda coupling mechanism for coupling the cam plate to the drive shaft, the coupling mechanism including:a rotary support that rotates integrally with the drive shaft;a first engaging surface provided on the rotary support; anda second engaging surface provided on the cam plate, wherein the first engaging surface and the second engaging surface engage and couple the cam plate to the rotary support to permit said inclination of the cam plate with respect to said drive shaft, wherein at least one of the first engaging surface and the second engaging surface has a predetermined shape that causes the first engaging surface to separate and disengage from the second engaging surface when the inclination angle of said cam plate is at or near a minimum.