Patent ID: 7634902

Claim:
A process of a conversion of heat energy into mechanical energy by means of periodical changing volume, pressure and temperature of a work medium, in separate chambers of a heat engine, comprising the steps of: sucking the work medium into a first stage chamber by enlarging the volume of the first stage chamber by motion of a piston of the first stage chamber; transferring the work medium from the first stage chamber into a second stage chamber, concurrently with decreasing the volume of the first stage chamber by motion of the piston of the first stage chamber and increasing the volume of the second stage chamber by motion of a piston of the second stage chamber; transferring the work medium from the second stage chamber through a third stage chamber of a constant volume to a fourth stage chamber concurrently with decreasing the volume of the second stage chamber by motion of the piston of the second stage chamber and increasing the volume of the fourth stage chamber by motion of a piston of the fourth stage chamber; while supplying heat to the work medium passing through the third stage chamber; transferring the work medium from the fourth stage chamber to a fifth stage chamber, concurrently with decreasing the volume of the fourth stage chamber by motion of the piston of the fourth stage chamber and increasing the volume of the fifth stage chamber by motion of a piston of the fifth stage chamber; and discharging the work medium from the fifth stage chamber by decreasing the volume of the fifth stage chamber by motion of the piston of the fifth stage chamber; wherein mechanical energy is consumed when decreasing the volume of the first stage chamber and decreasing the volume of the second stage chamber, and mechanical energy is carried away when increasing the volume of the fourth stage chamber and increasing the volume of the fifth stage chamber.