Patent ID: 6905318

Claim:
A compressor, comprising: a compression chamber including a cylinder and a piston for compressing working fluid therebetween; an end plate for blocking an opening of the cylinder, the end plate including a discharge port provided therethrough, through which the working fluid flows out from the compression chamber, the end plate having a valve seat portion and a bore connected to the valve seat portion; the valve seat portion provided around the discharge port and having a tapered surface, so that a cross-sectional area of the discharge port increases in a direction away from the compression chamber; a valve having a projection portion having a tapered surface, at least a portion of which, in a closed portion is in contact with the tapered surface of the valve seat portion wherein the valve has a flat surface portion provided at an end portion of the valve on the side of the compression chamber; a retainer inserted into the bore for holding the valve opposing to the valve seat portion; and a biasing means for supporting the valve, so that the valve is biased towards the closed position in contact with the tapered surface of said valve seat portion by can be forced out of contact with the tapered surface of the valve seat portion by pressure within the compression chamber, wherein the biasing means is a leaf spring formed with slits for biasing the valve with a central portion thereof.