Abstract: A rotary apparatus uses vanes which oscillate with respect to one another, while simultaneously rotating within a chamber, to compress a gas or pump a liquid. The oscillating motion results from interaction of at least a single coupled pair of elliptical drive members. When the driver elliptical member is rotated at a constant angular velocity, it causes the driven elliptical member to rotate with a varying angular velocity. As the driven elliptical member is connected to at least one vane, that vane also rotates with a varying angular velocity. In a preferred embodiment, two pairs of meshing elliptical gears drive four vanes with an oscillating and rotating motion.

Abstract: The present invention comprises an axial flow compressor and an impeller in fluid communication on a common rotatable shaft with an inlet fan and drive pulley. The compressor and impeller are each dischargeable into a cooling-heating tube. An air separation device at the downstream end of the cooling-heating tube draws cool air from the axially central part of the cooling-heating tube, and it draws hot air from adjacent the inner walls of the cooling-heating tube. The different streams of air may be selectively conducted to the interior of an automobile to function as an air conditioner, a defroster or the like. The compressor, impeller and inlet fan may be empowered by rotative means such as an automobile engine.