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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]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...
  • [发明专利]US19770783069 _ A. L. KORR ASSOCIATES, INC. 1977年03月30日
    Solar energy is collected by an array of parallel trough-like reflectors of paraboloidal cross-section, and concentrated upon radiation-absorbent pipes positioned along the lines of focus of the reflectors. The array is mounted on a boat which floats ...
  • [发明专利]US19770765045 _ CZAJA, JULIUS 1977年02月02日
    The invention involves thermodynamic processes, heat engines, and ways of making gaseous fluid jets by using primarily the latent heat of condensation for the energy required. A vapor such as water vapor is mixed with a gaseous fluid such as air, and ...
  • [发明专利]US19770844573 _ LA STELLA, JOSEPH P. TORNABENE, MICHAEL G. 1977年10月25日
    A buoy type wave energy extraction construction in which the natural frequency of vertical oscillation of the buoy is mechanically altered to at least partially conform to the wave frequency occurring during a period of operation, whereby the maximum ...
  • [发明专利]US19770827237 _ UNION OIL COMPANY OF CALIFORNIA 1977年08月24日
    A method for producing mechanical energy from geothermal fluids in which a heat transfer fluid (HTF) is heated by direct contact with the hot geothermal fluids, thereby partially cooling the geothermal fluids. A working fluid is heated by direct conta...
  • [发明专利]US19770802908 _ THE SECRETARY OF STATE FOR ENERGY, IN HER BRITANNIC MAJESTY"S GOVERNMENT OF THE UNITED KINDGOM OF GREAT BRITAIN AND NORTHERN IRELAND 1977年06月02日
    A device for extracting energy from water waves comprises high-level and low-level reservoirs with non-return valves for permitting water from wave crests to enter the high-level reservoir (but not return) and for permitting water from the low-level r...
  • [发明专利]US19770804990 _ TIPPS, THOMAS R. 1977年06月09日
    An impeller having an axle with radial vanes is mounted within a housing. The housing includes a funnel to direct a large amount of wind into the impeller. Air fins on top of the housing maintain the funnel pointed into the wind. A flap upon the top o...
  • [发明专利]US19770797232 _ BSP INTERNATIONAL FOUNDATIONS LIMITED 1977年05月16日
    A drop hammer has a hydraulic cylinder and piston assembly with a hammer weight attached to the piston and a sleeve valve at the lower end of the cylinder coaxial with the cylinder. An outer casing surrounds the cylinder, forming an annular passage fr...
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