Patent ID: 6305918
Filing Date: 2001-10-23
Classification: F04B

Abstract:
A piston rod seal assembly for a walking beam compressor cylinder having a top cap, a piston within said cylinder and a piston rod connected to said cylinder and extending through said top cap, said piston rod seal assembly including:a cylindrical cavity formed in said top cap surrounding said piston rod;an annular lower insert positioned in said cylindrical cavity;a lower annular seal and a lower wear ring mounted on said annular lower insert for engagement with said piston rod;an annular center insert positioned above said annular lower insert;an upper annular seal mounted on said annular center insert for engagement with said piston rod;an annular upper insert positioned above said annular center insert and having an upper wear ring for engagement with said piston rod; anda hollow insert cap positioned over said inserts and attached to said top cap.