Abstract: Variable volume chamber devices are disclosed. The chambers may be defined by the space between two complementary rotors. The volume of the chambers may vary as a function of the variation of relative rotational speeds of the two rotors.

Abstract: Variable volume chamber devices are disclosed. The chambers may be defined by the space between two complementary rotors. The volume of the chambers may vary as a function of the variation of relative rotational speeds of the two rotors.

Abstract: An internal combustion engine that completes four cycles, intake, compression, expansion and exhaust in one revolution of the crankshaft is disclosed. The combustion chamber is formed with four parallel vanes joined at their ends by shared bearings and pivot pins within two fixed parallel walls. The vanes lozenge across alternate corners of the chamber to change the volume defined by the four moveable vanes and the two fixed parallel walls. The chamber volume changes from a minimum to a maximum to a minimum and back to the original maximum to achieve four cycle operation with one crank shaft revolution. The crankpin may have two side by side connecting rods rotating each of the adjacent driven vanes. The driven vanes may be connected about a common shared pivot pin that extends into the fixed side walls and the other two interconnected follower vanes may be driven in rotation and translation about their shared and common pivot pins.