Abstract: The subject of the invention is an energy generating apparatus for utilizing the energy of a flow medium having a support structure (13), at least one waving element (1), at least two fastening elements (4), a drive and control unit (5), and an energy recovery and transfer unit (10), wherein the waving element (1) is connected to the fastening elements (4), the drive and control unit (5) is connected to the fastening elements (4). It is characterized in that it comprises at least one turbulizer element (2), the waving element (1) between two fastening elements (4) is described as a regular waveform, determined by a function, and comprises at most one full wave period. The subject of the invention also includes the method for application of the apparatus.

Abstract: Various embodiments of an apparatus and method for extracting useful work from a fluid stream are disclosed. Some embodiments comprise balanced hydrofoils comprising upper and lower semifoils joined by a member. Some embodiments comprise an array of removable hydrofoil modules wherein each module is adapted to provide an independent power contribution to an overall system, depending on speed of the fluid stream in the vicinity of the module, and each module is further adapted to provide its power contribution at a substantially consistent pressure to an array-wide high pressure fluid circuit. These and other embodiments are further disclosed herein.

Abstract: The Variable Foil Machine harnesses fluid flow energy and propels fluids. A flexible foil (120) with reversible camber is secured to leading draft member (150) on leading support (122) and to trailing draft member (130). The trailing draft member (130) is secured to trailing guide (132), movable on trailing support (136). Apparatus can be installed on the ground or a craft via pivoting carrier (138), for alignment with fluid flow. In one embodiment, trailing draft member (130) reciprocates between support members 136l and 136r, upon oscillation of the foil (120). In other embodiments, a reciprocation amplitude offset between leading draft member (150) and trailing draft member (130) promotes cyclic translation of the foil (120) and linkage thereto. An energy converter (142) may be cooperatively coupled to produce energy or perform work. Integration of foil oscillations into rotary movement via a crank arm (48) is also embodied.

Abstract: Method and apparatus for converting the kinetic energy of a moving fluid stream into useful work by using a parallel cascade of aerofoils or hydrofoils positioned therein. The foils may be provided with at least two degrees of freedom and adjacent foils move in antiphase. The foils are subjected to resonant oscillations, known as flutter, induced by the fluid flow. Profiled inflow and outflow ducts may be positioned upstream and downstream, and the apparatus may be enclosed in a profiled duct, to increase efficiency by altering the fluid velocity and pressure. The foils are cantilevered, supported by vertical rods but are otherwise unattached. A cascade comprised of independent foil modules, each including a foil, a power conversion module and a motion control module, may be programmed to (1) receive energy from a fluid stream to generate power, or (2) transfer energy into a fluid stream to create propulsion or pumping.

Abstract: A fire fighting pump and operation thereof and a fire fighting system and a fire engine, wherein the pump includes a housing, a motor mounted inside the housing and two or more stages of series-connected impeller assemblies. A water inlet is provided on the housing between the motor and the impeller assemblies. The impeller assemblies are mounted on the impeller shaft coaxially and in series with each other. The impeller shaft is fixed on the motor shaft or is coaxial with the latter. The impeller assembly includes a thruster, an impeller, an end cover and a retaining ring on the periphery of the thruster and the impeller, and those four elements are installed in turn. Several first blades are provided in the thruster and several second blades which correspond with the first blades in amount and location are provided in the impeller.

Abstract: Method and apparatus for converting the kinetic energy of a moving fluid stream into useful work by using a cascade of thin aero or hydro foils positioned therein. The foils may be provided with at least two degrees of freedom and adjacent foils move out of phase. The foils are subjected to fluid induced oscillations known as flutter. Barriers (3, 43) may be positioned upstream, above, or at sides of the apparatus for increasing efficiency by increasing the fluid velocity. A system of flywheels (17, 18) are used to increase inertia of the foils and are particularly useful with hydrofoils. A cascade of aero or hydro foils may be mechanically oscillated to transfer energy to a fluid.

Abstract: A concentric-double-shaft simultaneously rotating apparatus in which a part of the force for driving an inner shaft to rotate is obtained by a device other than a rotation controlled motor to thereby reduce the capacity of the rotation controlled motor to attain reduction in size of the apparatus, increase of stiffness, and so on. The concentric-double-shaft simultaneously rotating apparatus includes at least one permanent magnet which is attached onto an inner circumferential surface of an outer shaft, and a secondary conductor such as a copper pipe, or the like, is provided on an outer circumferential surface of the inner shaft to create an induced current flow.

Abstract: A device for converting a rotational movement for directing displacement of a flowable medium is provided with a mount and two rotatably mounted fixed axles which are arranged at a distance from one another on the mount and on which are articulated two end portions of a half cube-linkage chain having two lateral members and a middle member, the two lateral members being connected to the fixed axles and to the middle member by means of pivot axles which are successively offset relative to one another by in each case 90.degree.. The device is characterized in that the middle member and at least one of the two lateral members of the half cube-linkage chain cooperate to form sheet-like driving elements for displacing flowable substances.

Abstract: A stabilizer device for minimizing the roll of a boat including two plates connected by a hinge and a plurality of bridles attached to the plates so that when the stabilizer is pulled up through the water by the bridles the plates open about the hinge to resist upward motion and when the stabilizer is released the plates close together about the hinge to permit the stabilizer to fall rapidly.

Abstract: An apparatus is provided for converting an air flow into useful mechanical work by means of a reciprocating blade means. The preferred blade means comprises a plurality of lightweight, airfoil shaped blades mounted in a stack for moving a carrier associated therewith along a rectilinear path. A reversing means reverses the angle of attack of the blade at each end of the carrier travel. The wind machine is generally of rectangular shape and can be readily used in combination with high-rise buildings to provide a useful work output.