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  • [发明专利]US19770828171 _ AGENCE NAT VALORISATION RECHERCHE 1977年08月26日
    The invention relates to a solar energy collector or cell comprising a fixed spherical mirror placed on the ground by its convex face and a boiler in which circulates a heat-transfer fluid and which is movable about the center of the mirror. The boile...
  • [发明专利]JP19770084181 _ MIYAMOTO KUNIO 1977年07月15日
  • 3.
    [发明专利]JP19770172735U _ 1977年12月23日
  • [发明专利]JP19770114369 _ SAOTOME KAZUO 1977年09月22日
  • [发明专利]GB19770027702 _ FUERST VON HOHENZOLLERN F W 1977年07月01日
  • [发明专利]FR19770039978 _ RATTIN ANGE 1977年12月27日
    The windmill consists of a main support with guy lines. The support is connected to a central star wheel which has six radial arms. Each arm carries smaller star wheels also with six arms. Each arm carries a three bladed propeller, which directly driv...
  • 7.
    [发明专利]DE19772726118 _ MITSUI ENGINEERING & SHIPBUILDING CO. LTD., TOKYO, JP 1977年06月10日
  • [发明专利]DE19772730658 _ SCHAEFER,HERMANN 1977年07月07日
    The hydro-power unit is intended for electric power generation from the flow of water in small streams and rivers. It comprises a water inflow section, water through-flow channels with pump chambers, and a turbine unit. The inflow section and the chan...
  • [发明专利]US19770781081 _ SCHAFFRAN PROPELLER LEHNE & CO. 1977年03月25日
    A variable-pitch propeller has a hollow hub rotatable about a hub axis and carrying a plurality of angularly equispaced vanes each rotatable on the hub about a respective vane axis extending radially of the hub axis. Each of the vanes has an eccentric...
  • [发明专利]US19770846069 _ MOUTON, WILLIAM J JR THOMPSON, DAVID F 1977年10月27日
    A power plant for the generation of electricity from the flow of water currents uses turbine wheels within nozzles submerged in the water current, anchored to the bottom of the water course, as for example, the ocean, and self-buoyed to a level well b...
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