Abstract: An improved mechanism having a housing defining a gas pressure sustaining chamber for an engine, compressor, or the like, including a double-acting movable partition within the chamber providing alternate expansion and compression of the chamber's sections on opposite sides thereof. The movable partition comprises two rectangular plates in end-abutting relation having their adjacent ends pivotally mounted on a rotatable crank pin on which they undergo limited pivotal motion with respect to each other. The outer ends and sides of the partition plate make a sealing, sliding engagement with adjacent walls of the chamber and the outer ends are constrained to undergo reciprocating motion along substantially parallel lines.

Abstract: Fluid handling mechanism has a vane with parallel side edges coupled to a crank at one end and to an obliquely transverse guide track at the other end. The vane is closely runningly fitted, between parallel side walls and curved top and bottom walls, executing a longitudinally moving line contact with the curved walls in conjunction with irrotational, purely linear, fluid flow. This contact may range from zero to a substantial clearance. Flow is combined fluidynamic fan effect and positive displacement. The positive displacement portion is increased when two such mechanisms are assembled tandemly, in series, with the vanes piano-hinged together. The four walls form a duct, the ends of which may be ported or valved. The duct may also be closed at its ends to constitute a chamber, allowing the mechanism to serve as a closed cycle regenerative gas engine.