Patent ID: 6540492
Filing Date: 2003-04-01
Classification: F04B

Abstract:
A compressor comprising:a cylinder extending along an axis; a piston reciprocating along said axis between a bottom portion and a top portion and having an upper face defining a circular piston profile; a valve plate closing said cylinder at said top, said valve plate having a plurality of circumferentially spaced discharge ports aligned within one semi-circle of said piston profile and a plurality of circumferentially spaced suction ports within an opposed semi-circle, and reed valves closing said discharge ports, said reed valves being mounted on an outer face of said valve plate; and said piston having a top surface including a plurality of circumferentially spaced protrusions with one of said protrusions associated with each of said discharge ports, and said plurality of protrusions being formed to be non-concentric relative to the center of said piston.