Patent ID: 6776587
Filing Date: 2004-08-17
Classification: F04B

Abstract:
A piston arrangement for a dual-stage piston compressor, comprising:a crankshaft in a crankshaft housing; several cylinders having pistons therein; two or more low-pressure cylinders forming a low-pressure stage and at least one high-pressure cylinder forming a high-pressure stage; the low-pressure cylinders being arranged with respect to the high-pressure cylinder such that the low-pressure cylinders compress in-phase within an offset of less than Â±15 degrees to each other, and are offset by 180 degrees Â±20 degrees with respect to the at least one high pressure cylinder; and the piston cylinder arrangement of the low-pressure stage being constructed such that, in an intake operation, the pistons of the low-pressure stage move in the direction of the crankshaft thereby compressing the air in an interior space of the crankshaft housing, and thus air from the interior space of the crankshaft housing is taken into a compression space of the low-pressure cylinders.