Patent ID: 6592346
Filing Date: 2003-07-15
Classification: F04C,F16K,Y10T

Abstract:
A rotary compressor comprising:a shell having a fit end and a second end; a cylinder having a bore containing pump structure including a vane and a piston coacting with said cylinder to define suction and compression chambers; said cylinder being fixedly located in said shell near said first end; a first bearing underlying said bore and secured to said cylinder and extending towards said first end; a second bearing secured to said cylinder, overlying said bore and extending towards said second end; a motor including a rotor and a stator; said stator being fixedly located in said shell between said cylinder and said second end and axially spaced from said cylinder and said second bearing; an eccentric shaft supported by said first and second bearings and including an eccentric operatively connected to said piston; said rotor secured to said shaft so as to be integral therewith and located within said stator so as to define therewith an annular gap; means for supplying gas to said pump structure; a discharge fluidly connected to said shell; a discharge port located in said second bearing; a valve overlying said discharge port; and said valve having a first end being secured to said second bearing so as to permit flexure of said valve and a second end coacting with said discharge port to control flow therethrogh, wherein said second end coacting with said discharge port includes a convex shaped portion which extends into said discharge port when said second end is prohibiting flow through the discharge port and wherein said convex shaped portion merges into a concave shaped portion before any contact by the second end with a valve seat formed in said second bearing when said second end is prohibiting flow through the discharge port and wherein the valve seat formed in said second bearing is substantially circular and wherein the contact by the second end with the valve seat is a circular contact having a radius located in a first plane defined by the circular contact and wherein said convex shaped portion merges into said concave portion at points of contraflexure located on the circumference of a circle, said circle containing said points of contraflexure having a radius in a second plane defined by said points of contraflexure, said radius in said second plane being greater than one-half of said radius in said first plane.