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  • [发明专利]US19740474915 _ SCHUR, GEORGE O. 1974年05月31日
    A thermal power generating system including a heat engine consisting of a generally egg-shaped vapor vacuum-sealed container and a heat-transfer fluid circuit, the fluid circuit including a heat source such as a solar heater or an arrangement for util...
  • [发明专利]US19740507289 _ RUSBY, JOSEPH V. 1974年09月19日
    A tide-powered electrical generator wherein the energy from successive rising tides is stored in the form of potential energy for selective conversion to electricity. A float is constrained to vertical motion and it raises on successive tides a weight...
  • [发明专利]US19740514175 _ AGENCE NATIONALE DE VALORISATION DE LA RECHERCHE (ANVAR) 1974年10月11日
  • [发明专利]US19740457075 _ TORNABENE, MICHAEL G. 1974年04月01日
    In a preferred embodiment of the invention, there is provided a double-action piston water pump of elongated shape with the piston supported on a lever rod extending coaxially to the piston chamber and extending through both ends of the cylinder provi...
  • [发明专利]US19740537097 _ WENDLER, CLARENCE 1974年12月30日
    An omnidirectional windmill mounted on and affording traction power to a carriage traveling an endless path about a nutating wheel that is drivingly coupled to means for pumping water from a lower fish farm to an upper fish farm in a system whereby su...
  • [发明专利]US19740509265 _ HITACHI, LTD. 1974年09月25日
    A device whereby water leaking through the guide vanes while the water-wheel is in spinning reserve can be drained through leak drain pipes which open in the fixed member near the outer periphery of the runner.
  • [发明专利]US19740526829 _ MCDERMOTT, HUGH L. 1974年11月25日
    A casing, formed to provide fluid inlet and outlet openings and a stationary internal gear intermediate the openings, the casing journaling a rotary shaft coaxial with the internal gear. Primary and secondary rotors are fixed on the shaft in axially s...
  • [发明专利]US19740469391 _ VAN HUISEN, ALLEN T. 1974年05月13日
    A system for the mining of geothermal energy in which a plurality of geothermal wells radiate from a single surface site into a subsurface geothermal reservoir. The wells can be drilled by conventional slant drilling techniques and each may contain a ...
  • [发明专利]US19740474971 _ DOMINION ENGINEERING WORKS LIMITED 1974年05月31日
    The stems that support wicket gates of hydraulic machines such as pump turbines are stablized against undesired oscillation or other vibration by applying a transverse hydraulic force against each stem to push it against one side of a supporting bushi...
  • [发明专利]US19740453710 _ TRW INC. 1974年03月22日
    In an improved hydraulic device the leakage of fluid between a rotor and a first one of a pair of end plates is prevented by a metal-to-metal seal between the rotor and end plate. To maintain the seal, the rotor and end plate are urged together under ...
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