Patent ID: 8602760

Claim:
A vane compressor comprising: a cylinder which is approximately cylindrical; a frame which closes one axial end of the cylinder; a cylinder head which closes an opposing axial end of the cylinder; a rotor shaft which includes a rotary shaft part supported by the frame and the cylinder head and being eccentric to a center of an inner peripheral surface of the cylinder, and a rotor part which rotates about the rotary shaft part in the cylinder; and a vane which is installed in the rotor part, an outer periphery of a tip portion of the vane being curved in an arc shape; wherein the tip portion of the vane moves in the cylinder along with rotation of the rotor part in a state where a normal to the outer periphery of the tip portion of the vane and a normal to an inner periphery of the cylinder are approximately coincident with each other; and in a compression operation a normal to the outer periphery of the tip portion of the vane and a normal to an inner surface of the cylinder always intersect the central axis of the cylinder so that the normal to the outer periphery of the tip portion of the vane and the normal to an inner surface of the cylinder are always approximately coincident with each other.