Patent ID: 6463842
Filing Date: 2002-10-15
Classification: F01B,F04B

Abstract:
A compressor comprising:a plurality of cylinder bores; and a plurality of piston assemblies, each of which reciprocates between a top dead center and a bottom dead center position in one of said cylinder bores, each of said piston assemblies comprises a piston having a first groove, said first groove formed on an outer peripheral surface and at a first end of said piston, a piston ring having a truncated cone-shape inserted into said first groove, such that a wider edge of said piston ring opens towards a piston skirt portion of said piston, and a narrower edge of said piston ring abuts a bottom surface of said first groove, wherein a second groove is formed on an interior wall of at least one of said cylinder bores, and said second groove is positioned adjacent to and extends beyond said piston when said piston is at said bottom dead center position.