Patent ID: 6692236
Filing Date: 2004-02-17
Classification: F04B

Abstract:
A two-stage compressor, comprising:a first stage piston; a second stage piston; a block forming a first stage cylinder, cooperating with said first stage piston to form a first stage cylinder and piston system and a block forming a second stage cylinder, cooperating with said second stage piston to form a second stage cylinder and piston system; a case defining a closed volume communicating with a space under said first stage piston and under said second stage piston; a crankshaft with two crankpins that drives said first stage piston and said second stage piston with essentially concordant phases; a first intake chamber and a first compression chamber associated with said first stage cylinder and piston system; a second intake chamber and a second compression chamber associated with said second stage cylinder and piston system, said first compression chamber and said second intake chamber communicating with each other and with said closed volume formed in said case.