Abstract: A compressor which provides for minimum clearance in the compression chamber while substantially reducing the heat normally experienced by the piston during the compression stroke of a compressor of this type. The suction valve(s) of the compressor is concentrically mounted in the piston while the discharge valve(s) is concentrically mounted in a stationary position within the cylinder. Since the high heat of compression occurs at the discharge valve, the piston will be much cooler than in prior art compressors of this type which improves the efficiency of the compressor and which substantially extends the operational life of the piston rings.

Abstract: A radially-valved compressor wherein the fixed clearance of the compressor can be quickly and easily adjusted by adjusting the position of the suction and/or discharge valves in relation to their respective compression chambers. The valves are slidably positioned within the radial bores and are adjusted by means of threaded shafts which extend from the valves through the retainer caps which close the bores. When a valve is threadedly moved into its bore, the clearance within the compression chamber is decreased. When the valve is threadedly moved out of its bore, the fixed clearance is increased.