Patent ID: 7328575

Claim:
A method for controlling a flow of pressure fluid in a pneumatic device ( 1 ) comprising a generally closed pressure fluid circuit ( 2 ), at least one compressor ( 5 ), for increasing the pressure of the pressure fluid in the circuit, said compressor having an inlet ( 4 ) and an outlet ( 3 ), a tool ( 8 ) driven by the pressure fluid in the circuit, and through which the pressure fluid is transported in the circuit from the outlet ( 3 ) to the inlet ( 4 ) of the compressor, characterized in that a pressure is generated by the compressor ( 5 ) and a load at the tool ( 8 ) is controlled such that a return pressure in the circuit exceeding the surrounding pressure of the atmosphere is obtained downstream the tool ( 8 ), and in that the circuit comprises a return conduit ( 10 ), and in that a second heat exchanger ( 17 ) is used for cooling the pressure fluid present in the return conduit.