Abstract: An internal combustion engine with rotating pistons works on the basis of the cat and mouse principle. The charge is axially exchanged over one of the housing lids (28) and the adjacent rotary side disk (24). The combustion chambers (34) are formed by axially open recesses in the pistons (24) of the outer rotor (12) which communicate transversely to the axial direction with the adjacent working chambers (20). The fuel is supplied by injection nozzles (30) oriented in the corresponding housing lid (28) in the direction of the rotary side disk (24).

Abstract: The invention relates to a latent store with a photosensitive storage medium and a regenerating agent. To this end, an organic storage substance with at least two stable stereoisomeric configurations is used, the first of which is photosensitive and can be converted into the second configuration by photoisomerisation with the release of energy, while the second configuration can be reconverted into the first by contact with a solar radiation absorbing, stereoselective regenerating agent with energy absorption.

Abstract: A rotation piston internal combustion engine has a substantially stationary housing defining a plurality of blind holes, and a rotor rotatably mounted within the housing for rotation at a substantially uniform velocity about an axis. A hub has four pistons and is rotatably mounted within the rotor for rotation about the axis at a non-uniform velocity. Four crankshafts are each rotatably mounted through a respective rib of the rotor and coupled to a respective gear wheel so that the gear wheel rotates with the crankshafts. A ring gear is coupled to the housing for engaging the gear wheels to permit rotation of the gear wheels relative to the housing. The ring gear has a plurality of apertures having a second diameter, each corresponding in position to a respective blind hole in the housing.

Abstract: A rotary piston-internal combustion engine has a stationary engine housing with a central axis. A rotor is positioned within the housing and includes a cylinder with first pistons integral with and spaced uniformly apart around the inner surface of the cylinder. The first pistons are sector-shaped. The rotor rotates at a constant velocity. A hub is located within the cylinder coaxial with the central axis and can rotate relative to the cylinder and first pistons. Second pistons are fixed to the hub and each extends radially outwardly from the hub between a pair of adjacent first pistons. Openings extend through the cylinder and are arranged symmetrically relative to axially extending central plane of the first pistons. Seals are provided around the openings between the outside surface of the cylinder and the interior of the housing.

Abstract: In an internal-combustion engine having a cylindrical casing and two sets of pistons mounted in the casing for rotation about the casing axis and for angular reciprocating movement of one set relative to the other set, whereby combustion chambers between the two sets alternatingly expand and contract, the circumferential faces of all pistons sealingly engage the casing wall, the circumferential faces in one set of pistons being much wider than in the other set. Recesses in each of the wide faces bound an elongated land obliquely inclined relative to the casing axis while the narrow circumferential faces are axially elongated. The ports in the casing wall alternatingly opened and closed by the piston faces are parallelogram-shaped, two sides of each parallelogram being parallel with the direction of elongation of the lands, the other two sides being parallel with the narrow circumferential faces when the ports are covered by the faces respectively.

Abstract: The rotary-piston engine of U.S. Pat. No. 3,736,080 has two sets of pistons rotatable about a common axis in a casing. One set is attached to the output shaft of the engine for continuous rotation with the same while a motion-transmitting train connects the two sets in such a manner that the pistons of the other set are rotated at cyclically varying speed to expand and contract combustion chambers circumferentially bounded by respective pistons of the two sets. The motion-transmitting train includes crankshafts excentrically mounted on the output shaft and driven by planet gears meshing with an internal ring gear on the engine casing, and connecting rods linking each crank with the second set of pistons. According to this invention, the engine includes a central gear coaxial with the ring gear, meshing with the planet gears, and driving a second output shaft coaxially rotatable in the first-mentioned shaft.