Abstract: An internal axis single-rotation machine, wherein an external rotor and an internal rotor are mounted for intermeshing rotation about their own centers of gravity at different angular velocities within a casing and wherein two pairs of radially external sealing corner areas on the internal rotor kinematically describe internal lateral faces which define recesses in the external rotor and wherein internal sealing corner areas on the external rotor kinematically describe external peripheral faces on the internal rotor, the rotors being arranged in cooperating rotative relationship such that a meshing gear-like contact is maintained between the internal lateral faces of the external rotor and the lateral faces of the internal rotor.

Abstract: The engagement parts of the external rotor of a single-rotation machine are interconnected in circumferential direction of the rotor by a ring-like web. This allows high rotational speeds around the single axis of rotation of the external rotor without any increase in the size of dead spaces of the machine.

Abstract: To avoid friction losses or the striking of a sealing part (1) against the edge of a sealing surface interruption, the movement of the sealing part (1) into and out of contact with the sealing surface is controlled by the medium to be sealed, so that there is a sealing contact only at that moment in which there is an overpressure in the area to be sealed. This control takes place through the vacuum produced in the sealing gap (8) during the brief flow therethrough and the relative overpressure with respect thereto on the opposite side (10) of the sealing part (1). In the differential pressure-less state, the sealing part is e.g. held by a spring (6) at a distance from sealing surface (5).

Abstract: The engagement parts of the external rotor of a single rotation are provided with at least one cooling air duct. The inflow takes place by an inflow duct provided in the casing side plate and which is surrounded by the antifriction bearing mounting the external rotor, while the outflow takes place radially through openings provided in the circumferential wall of the casing.

Abstract: The engagement parts of the external rotor of a machine having plural fixed internal axes are reinforced by locking screws, which extend radially outwards to the side parts of the external rotor at an acute angle parallel to the longitudinal axis of said engagement parts. The thus prevented bulging of the engagement parts due to centrifugal forces permits high rotational speeds in the case of narrow sealing gaps between the external and internal rotors and with respect to the machine casing.

Abstract: An internal axis single-rotation machine, wherein an external rotor and an internal rotor are mounted for intermeshing rotation about their own centers of gravity at different angular velocities within a casing and wherein two pairs of radially external sealing corner areas on the internal rotor kinematically describe internal lateral faces which define recesses in the external rotor and wherein internal sealing corner areas on the external rotor kinematically describe external peripheral faces on the internal rotor, the rotors being arranged in cooperating rotative relationship such that a meshing gear-like contact is maintained between internal lateral faces of the external rotor and lateral faces of the internal rotor.

Abstract: An external shaft rotary piston machine wherein pistons of a piston rotor run in engagement with a cavity of a circular cylindrical sealing rotor during a particular relative rotational position of the rotors, the cavity being substantially larger than necessary for passage of the pistons in order to avoid flow losses due to seal wedging flow and compression. In order to avoid overflow from the high pressure side to the low pressure side of the machine through the sealing rotor while the pistons move in the sealing rotor through the space defined by the cavity, a sealing effect is created by a leading edge and a trailing edge portion of the opening of the cavity of the sealing rotor moving along a leading and a trailing side surface of the pistons. This is effected kinematically due to the fact that the trailing edge of the cavity opening is displaced radially inwardly and that an edge portion extends from the trailing edge convexly relative to the peripheral surface of the sealing rotor.

Abstract: A rotary piston machine, in order to avoid losses due to compressed flows, has adjacent to a generating and/or sealing contact edge (21, 22) at least one recess (11a, 11e) and/or opening (12a, 12b) which extends beyond the contact curve (14a-14c) in at least approximately the direction of motion of the surfaces moving in relation to each other during the stroke or passage of the piston (6a") through the shut-off driver. The spatial dimensions of the recesses and/or opening are such that the flow in it is not substantially accelerated even when the direction is changed. An opening (11g, 11g') can be closed insofar as it is located in a nonmoving ring (6b). To prevent low pressures between surfaces moving away from each other (9c, 14c) a pressure compensation space (11e) is connected to the contact line (14c) of one of the surfaces.

Abstract: An internal axis crankless rotary piston engine with an internal rotor and an external rotor mounted eccentrically to one another, with a circularly curved path of the external rotor mounting surrounding an internal rotor shaft, wherein the path of an external rotor bearing is mounted by a plurality of bearings which are spaced from one another in the direction of movement and which are fixed relative to the geometrical axis of the internal rotor shaft.

Abstract: An internally axed crankless piston engine wherein a piston rotor has at least one piston which moves through a circular annulus defined between a fixed inner casing and a fixed radially outer casing. A stopping piston is provided which defines the terminus of the annulus at one point on its circumference and an inflow duct issues into the annulus via an opening in the fixed inner wall of the inner casing or is arranged in the fixed radially outer casing wall adjacent to the stopping rotor while adjacent to the stopping rotor an outflow duct is provided in a fixed radially outer facing wall of the outer casing.

Abstract: A valve assembly having a cylindrical valve chamber with radially directed inlet orifices and with a circular spring leaf which resiliently seals the orifices and which may be deflected by fluid pressure within the inlet orifices to open the orifices. The spring leaf is configured so that it may deflect to open the valve inlet without deviation from its essentially oval shape.

Abstract: A seal mechanism for the periphery of the rotor of a rotary piston engine including a sealing ledge supported on the rotor to be pivotable about an axis extending in the longitudinal directional thereof and operative to make sealing contact with an opposed surface of said rotary piston engine over a limited region of the periphery of the sealing ledge facing toward said opposed surface. Through at least one secondary member extending parallel to the sealing ledge at a point of its periphery between the sealing ledge and the rotor, a surface region is defined on the sealing ledge at which forces are developed by the fluid working medium of the engine to effect a desired sealing engagement between the sealing ledge and the opposed surface of the engine.

Abstract: A sliding boat having supporting members respectively connected to opposite sides of the hull and projecting therefrom in cantilever fashion while carrying a plurality of water sliding foils at the free end of said supporting members. Each of the sliding foils comprises a plurality of relatively long and narrow strips extending in the longitudinal direction of the boat and being spaced from each other in the transverse direction of the strips so as to form a gap there between.

Abstract: A sliding boat having supporting members respectively connected to opposite sides of the hull and projecting therefrom in cantilever fashion while carrying a plurality of water sliding foils at the free end of said supporting members. Each of the sliding foils comprises a plurality of relatively long and narrow strips extending in the longitudinal direction of the boat and being spaced from each other in the transverse direction of the strips so as to form a gap therebetween.

Abstract: A rotary piston engine is provided which is suitable for working or conveying media in the form of hot deposit-forming gases or vapors. The engine comprises a housing and a rotor mounted rotatably within the housing. The clearance between the rotor and the housing increases as the engine temperature decreases and decreases as the engine temperature increases. This can be achieved by making the rotor of a material having a higher coefficient of expansion than the material of the housing, and/or by cooling the rotor to a lesser extent than the housing.

Abstract: A compound supercharged rotary piston engine device in which a rotary piston compressor is interposed between a pair of rotary piston engines to form a unit. A single shaft extends through the unit and has coaxial eccentrics for the engines and an eccentric displaced 180.degree. therefrom for the compressor. The compressor supplies primary combustion air to the engines and also supplies air thereto for afterburning uncombusted fuel entrained in the exhaust gases of the engines. The air supply from the compressor to the engines takes place in a set of passages in the walls which separate the compressor from the engines and the passages are under the control of the pistons of the device.

Abstract: The invention provides an ignition voltage supply system for a rotary piston engine. The engine itself has a housing with gas inlet and outlet openings, a shaft and a rotor eccentrically mounted on the shaft in the housing. The ignition voltage supply system includes sparking plugs arranged in the rotor and insulated feed members which are fixed to the rotor and connected to the plugs. An insulated distributor member is fixed to the shaft and distributes ignition voltage to each feed member, and a cable located in the shaft connects the distributor member to a source of electrical voltage. A lateral opening is provided in the gas inlet or outlet for fitting and removing a sparking plug.