46results about How to "Low moment of inertia" patented technology

A lightweight reflector with a load bearing structure based on a tensile spoke-wheel. The spoke structure is especially compatible with dish parabolic mirrors, but has utility as a carrier structure for any round functional surface, including flat or slightly-curved mirrors used in central tower solar systems, parabolic dishes for radio telescopes and antennas, and for non-concentrating thin film solar panels. There are no radial members loaded in compression. All the spokes pull the rim inwards, and the rim is compressed in the circumferential direction. The imbalance in spoke tension results from the application of load provides the rigidity of the rim in respect to the hub, both for in-plane and out-of-plane forces. Ribs stiffen the spokes to resist wind and gravity, but are not structurally supported by either the hub or the rim. Lightweight reflector tiles match the wheel structure and create the reflective surface.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

The invention relates to a rotor assembly (RA1, RA2) for an electric machine (EM), comprising a rotor (RT1, RT2) having an axis of rotation (DA1, DA2) extending in an axial direction of the rotor (RT1, RT2) and at least one first hole (AN11, AN12, AN21, AN21´, AN3) extending parallel to the axis of rotation (DA1, DA2) and radially spaced from the axis of rotation (DA1, DA2) by a first radial distance (A1, A21), and at least one first balancing element (WE1, WE21, WE3) for compensating an unbalance of the rotor (RT1, RT2) in rotation about the axis of rotation (DA1, DA2), wherein the at least one first balancing element (WE1, WE21, WE3) can be provided in the at least one first hole (AN11, AN12, AN21, AN21´, AN3) and can be fastened in the at least one first hole (AN11, AN12, AN21, AN21´, AN3) by means of a press fitting connection (PV) between the at least one first hole (AN11, AN12, AN21, AN21´, AN3) and the at least one first balancing element (WE1, WE21, WE3). Thus, a simple and economical possibility of balancing the rotor is provided.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

An exemplary embodiment of the invention relates to an on-axis or near on-axis optical head mounted projection display optical assembly for transmitting and magnifying a real image to an eye. The assembly comprises a miniature display, a projection lens for receiving the light rays from the display, a second lens positioned to receive the light from the projection lens, a beam splitter positioned for receiving and splitting the light rays from the second lens, a retro-reflective screen positioned for receiving the reflected portion of the split light rays from the beam splitter, and then reflecting the portion of split light rays wherein the portion of split light rays passes through the beam splitter. A third lens is positioned to receive the portion of split light rays from the retro-reflective screen and through the beam splitter.

A pair of A-frame members of molded plastic support an elongated beam extending through openings in apex portions thereof. Pockets are provided in the outsides of two legs of each A-frame member into which elongated weight cartridges are placed to be securely held to the legs. The legs and pockets are so formed that with a low volume and weight, a high strength and rigidity of the legs is achieved, a substantial contribution being made by the weight cartridges. The weights of the cartridges are used to resist tilting movement of the barricade and to achieve stability with a high degree of efficiency. The weight cartridges are preferably blow-molded plastic tubes filed with slag or sand and most preferably are interchangeable with cartridges currently in use in other applications. For additional stability, the legs of each A-frame member may be secured to an elongated member, to a plastic tube mounted there-between and / or to a blow-molded panel that is adapted to be filled with a weighty material and face in a longitudinal direction. Also, for additional strength and stability, elongated beams may be hung on lower portions of legs of the pair of A-frame members.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming a pair of inwardly spiraling primary-scroll passageways that significantly converge to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

A system and method for maintenance of a reflector with. The system may be incorporated to be an integral part of the dish assembly and may be operated autonomously or remotely. The system may include a controller programmed to activate the system according to set schedule or according to reflectivity drop of the light from the dish. The system includes a foldable arm that is folded when not in use so as not to interfere with the operation of the dish. When in use, the arm unfolds and includes injectors to inject fluids, such as air and / or liquids to clean the surface of the dish. The arm may include water injectors followed by drying air injectors, such as air knife. The system may include waste liquid collection system, such as a gutter and reservoir.

A hybrid induction motor includes a fixed stator, an independently rotating outer rotor, and an inner rotor fixed to a motor shaft. The outer rotor is designed to have a low moment of inertia and includes angularly spaced apart first bars and permanent magnets on an inner surface of the outer rotor. The inner rotor includes angularly spaced apart second bars and interior flux barriers aligned with the second bars. The outer rotor is initially accelerated by cooperation of a rotating stator magnetic field with the first bars. As the outer rotor accelerates towards synchronous RPM, a rotating magnetic field of the permanent magnets cooperate with the second bars of the inner rotor to accelerate the inner rotor. At near synchronous speed the rotating stator magnetic field reaches through the outer rotor and into the inner rotor coupling the two rotors for efficient permanent magnet operation.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings. The bearing housing forms a shroud for the internal side of the compressor wheel.

An actuator comprising: two motors; an output member; and a harmonic gear comprising: an elliptical wave generator component; a flexible spline component which is coupled to the wave generator by a bearing and flexes to conform to the elliptical shape of the wave generator; and a circular spline component which surrounds and meshes with the flexible spline component. One of the harmonic gear components is coupled to the output member, and each of the other harmonic gear components is coupled to a respective one of the motors.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

A folding propeller for a boat, e.g., for a sailboat or a multihull yacht, and a method for installing and / or adjusting such a folding propeller, where said folding propeller has a hub for directly or indirectly fastening at a driveshaft connected to a motor, where said folding propeller further has at least two individual blades, where each of said blades has a root arranged to pivot around a pivot pin at said hub to be either in a first, operative position, where the blades are pointing mainly in a radial direction, and in a second, inoperative position, where the blades are pointing mainly in an axial direction, where said hub has one or more cut outs for said blades roots and further has a first set of holes for installing said pivot pins and a second set of holes for installing a locking device for engagement with said pivot pins.

A lightweight reflector with a load bearing structure based on a tensile spoke-wheel. The spoke structure is especially compatible with dish parabolic mirrors, but has utility as a carrier structure for any round functional surface, including flat or slightly-curved mirrors used in central tower solar systems, parabolic dishes for radio telescopes and antennas, and for non-concentrating thin film solar panels. There are no radial members loaded in compression. All the spokes pull the rim inwards, and the rim is compressed in the circumferential direction. The imbalance in spoke tension results from the application of load provides the rigidity of the rim in respect to the hub, both for in-plane and out-of-plane forces. Ribs stiffen the spokes to resist wind and gravity, but are not structurally supported by either the hub or the rim. Lightweight reflector tiles match the wheel structure and create the reflective surface.

An exemplary embodiment of the invention relates to an on-axis or near on-axis optical head mounted projection display optical assembly for transmitting and magnifying a real image to an eye. The assembly comprises a miniature display, a projection lens for receiving the light rays from the display, a second lens positioned to receive the light from the projection lens, a beam splitter positioned for receiving and splitting the light rays from the second lens, a retro-reflective screen positioned for receiving the reflected portion of the split light rays from the beam splitter, and then reflecting the portion of split light rays wherein the portion of split light rays passes through the beam splitter. A third lens is positioned to receive the portion of split light rays from the retro-reflective screen and through the beam splitter.

A folding propeller for a boat, e.g., for a sailboat or a multihull yacht, and a method for installing and / or adjusting such a folding propeller, where said folding propeller has a hub for directly or indirectly fastening at a driveshaft connected to a motor, where said folding propeller further has at least two individual blades, where each of said blades has a root arranged to pivot around a pivot pin at said hub to be either in a first, operative position, where the blades are pointing mainly in a radial direction, and in a second, inoperative position, where the blades are pointing mainly in an axial direction, where said hub has one or more cut outs for said blades roots and further has a first set of holes for installing said pivot pins and a second set of holes for installing a locking device for engagement with said pivot pins.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings. The bearing housing forms a shroud for the internal side of the compressor wheel.

The invention relates to an integrated water-cooled permanent magnet servo two-way clamping electric spindle structure. The integrated water-cooled permanent magnet servo two-way clamping electric spindle structure comprises a clamping base shell and a right bearing block. The right bearing block is embedded into one side in the clamping base shell, a spindle is coaxially mounted in the right bearing base, a spindle bearing is arranged between the right bearing base and the spindle, a rotor sleeve connected with the spindle is arranged on the outer side of the right bearing base, a stator is arranged on the portion, located on the outer side of the rotor sleeve, in the clamping base shell, an oil cylinder piston is axially mounted at one end of the spindle, a left rubber chuck and a rightrubber chuck are mounted in the oil cylinder piston and the spindle, and the left side of the oil cylinder piston is sleeved with an oil cylinder sealing cover. A hydraulic clamping oil inlet and a hydraulic loosening oil inlet are formed in the right bearing block, and a left bearing block sealing cover and a right bearing block sealing cover are mounted on the left side and the right side of theright bearing block. The brand-new structure is adopted, and the problems in the prior art are effectively solved.

A turbocharger including a turbine wheel having a hub-to-tip ratio of no more than 60% and blades with a high turning angle and a curved leading edge, a turbine housing forming an inwardly spiraling primary-scroll passageway that significantly converges to produce highly accelerated airflow into the turbine at high circumferential angles, and a two-sided parallel compressor. The compressor and turbine each produce substantially no axial force, allowing the use of minimal axial thrust bearings.

A turbocharger including a turbocharger housing, a rotor and a heat shroud. The turbocharger housing includes a turbine housing affixed to a bearing housing. The rotor includes an axial turbine wheel with a hub, and a shaft extending through the bearing housing. The hub defines a back-disk surface that faces the bearing housing, and the bearing-housing defines an outer surface facing the turbine hub. The turbine housing forms a radial scroll, and the heat shroud forms a curved portion turning that radial scroll direction to an axial direction. The heat shroud establishes a back-disk cavity between a bearing-housing turbine-end-wall outer surface, the turbine-wheel back-disk surface, the curved portion of the heat shroud, and a cylindrical outer surface of a turbine-end portion of the shaft. The heat shroud includes flat ribs within the back-disk cavity to impede the circumferential flow of exhaust gas within the back-disk cavity.