Patent ID: 6487843
Filing Date: 2002-12-03
Classification: F01C,F04C

Abstract:
An apparatus having at least two meshed axially parallel screw spindles, means for driving the screw spindles in opposite directions but with the same rotational speed, a thermal insulated stator tightly enclosing the screw spindles on the casing side and forming substantially enclosed respective air chambers extending over a threaded section, the chambers being displaced during rotation of the screw spindles in the axial delivery direction from an air induction connection to an air inlet region of a working machine torsionally connected to the screw spindles, a combustion chamber associated with the working machine and which has a fuel supply and ignition device, means for respectively introducing the exhaust gases via an exhaust pipe into an end of a shaft hollow space opposite to the air induction connection, the shaft hollow space being configured relative to the air chambers as a counterflow heat exchanger and opening into an exhaust in the region of the air induction connection.