Patent ID: 6874995

Claim:
A compressor comprising: a cylinder block comprising a first end surface and a second end surface apposite to each other, the cylinder block further comprising at least one cylinder bore extending from the first end surface to the second end surface; a sleeve closely fitted in each of said at least one cylinder bores and having a first sleeve end which is flush with the first end surface and having a second sleeve end opposite to the first sleeve end; and at least one piston slidably fitted in the sleeve, so as to reciprocate between a bottom dead center (D 1 ) proximate to the first sleeve end and a top dead center (D 2 ) opposite to the bottom dead center (D 1 ) within the sleeve wherein the sleeve has a length greater than that of the cylinder bore and extends beyond the cylinder bore, so that the second sleeve end is positioned distal to the second end surface of the cylinder block; and further comprising a plurality of cylinder bores and a plurality of sleeves, wherein the a plurality of sleeves are connected with each other by means of at least one connection portion and wherein said at least one connection portion extends between two of said plurality of sleeves, such that said at least one connection portion prevents said two sleeves from rotating and sliding on inner surfaces of said cylinder bores.