Abstract: This invention relates to expansible chamber positive displacement pumps, motors, and engines and includes variable displacement features. It provides a different method of making vane, piston, and roller abutment pumping devices which has benefits in sealing, dynamic and pressure balancing, and increased rotational speeds; resulting in better performance and higher efficiency. Since this is a technology that is parallel to existing technologies, this application is complex.

Abstract: A variable compression ratio rotating engine comprises a containing cylinder forming variable volume chambers, defined by the cylinder inner wall and piston side walls, the cross-section of which has substantially the shape of a circle sector. During the operation of the engine, the pistons are rotated with an uneven circular motion, by a mechanism including a crank, having an eccentric axis with respect to that of the containing cylinder, and small coupling rods coupling the arms of the crank and the end portions of small shafts passing through the pistons, the compression ratio being changed by means of a further mechanism able of changing the eccentricity value of the crank axis with respect to the cylinder axis.

Abstract: This invention relates to a device to displace fluids or to displace and change the volume and pressure of compressible fluids, comprising a number of vanes radiating from a hinge line or shaft and a governing rotator to change the circumferential spacing of the vanes as they revolve. In various embodiments of the invention the device may be used as a fan or pump, a jet propulsion device for aircraft, a heat pump operating on a pure gas cycle, and as a heat engine with external or internal heat source. In one embodiment of the invention the device may be used to perform the function of the wing of an aircraft, but requiring no horizontal motion of the aircraft itself; however, if this same aircraft is made to move horizontally in a certain direction very high lift coefficients may be obtained.