Rotary compressor

Abstract

A rotary compressor 1 includes a pair of closing members 11 and 12 that close axial front and rear opening portions of a cylinder 5 , and a rotor 6 that is accommodated within the cylinder 5 and rotated by a motor. Concave portions 11 C and 12 C having the same depth are respectively formed in inner wall surfaces 11 A and 12 A of the closing members 11 and 12 , and the concave portions 11 C and 12 C are filled with synthetic resin coatings 22 . Accordingly, the surfaces of the synthetic resin coatings 22 are flush with the inner wall surfaces 11 A and 12 A located outwardly adjacent thereto (a left side in the drawing). The rotary compressor 1 which can prevent a seizure on end surfaces 6 A and 6 B of the rotor 6 , and can be manufactured at low cost can be thereby provided.

1 . A rotary compressor comprising: a cylindrical cylinder that is arranged within a casing; a pair of closing members that close axial front and rear opening portions of the cylinder; a compression space that is formed by the cylinder and the pair of closing members; and a rotor that is accommodated within the compression space so as to be movable in conjunction with a drive shaft, wherein
 a concave portion is formed in a region facing the compression space in an inner wall surface of each of the closing members, and the concave portion is filled with a synthetic resin coating such that a surface of the synthetic resin coating is flush with the original inner wall surface of the closing member located radially outward thereof,   wherein a plurality of annular grooves are concentrically formed at a same radial pitch in the surface of the synthetic resin coating.   
     
     
         2 . The rotary compressor according to  claim 1 , wherein an outer rim of the synthetic resin coating and an outer rim of the concave portion are located radially outward of an inner circumferential surface of the cylinder, and are in abutment against an axial end surface of the cylinder when the cylinder and the pair of closing members are coupled together by fastening means. 
     
     
         3 .- 4 . (canceled)