Patent ID: 8317488
Filing Date: 2012-11-27
Classification: F04B

Abstract:
1. A multi-cylinder dry-running piston compressor for generating compressed air, the piston compressor comprising: a crankcase having an interior; a crankshaft rotatably mounted in the crankcase; two connecting rods mounted in the crankshaft and configured to run counter to one another; two cylinders mounted in the crankcase; a piston arranged at an end of each of the connecting rods and configured to run in a respective one of the two cylinders; means for generating a cooling air flow which passes through the interior of the crankcase, the cooling air flow being a result of a pumping effect caused by a movement cycle of the pistons; and separating means for creating a separate piston chamber arranged in the crankcase for each piston to operate within, wherein the chambers surround the crankshaft to generate different pressure conditions in the chambers to assist in generating the cooling air flow from the pumping effect caused by the movement cycle of the pistons.