Patent ID: 6183211
Filing Date: 2001-02-06
Classification: F04B

Abstract:
A reciprocating piston oil free gas compressor comprising a first compression stage including a first wobble piston connected to reciprocate in a first cylinder, a second compression stage including a second wobble piston connected to reciprocate in a second cylinder, and a motor connected to reciprocate said first and second wobble pistons, wherein said first compression stage is adapted to compress gas from a low pressure to an intermediate pressure and said second stage is adapted to compress gas from the intermediate pressure to a higher pressure when said pistons are reciprocated, a first seal mounted on said first piston to provide a seal between said first piston and said first cylinder, a second seal mounted on said second piston to provide a seal between said second piston and said second cylinder, said first seal having a first average life when operated in said compressor, said second seal having a second average life when operated in said compressor, and wherein said the average operating life for said first seal is substantially the same as the average operating life for said second seal when said seals are operated in said compressor.