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  • [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...
  • [发明专利]US19770803543 _ HAGEN, ALF R. HAGEN, ERIC C. 1977年06月06日
    A combination floating breakwater and wave energy collecting system in which a pair of joint floating spread wings are provided between which a vessel can be moored. The spread angle of the wings is adjustable and the wings can be jointly swung about ...
  • [发明专利]US19770814551 _ ATENCIO, FRANCISCO J G 1977年07月11日
    A reversible hydroelectric station associated with a dam having a water passageway includes shiftable components selective displaceable to achieve alternately, either an energy generation or an energy accumulation mode. One or more rotatable hydromoti...
  • [发明专利]US19770834249 _ FULLER, RICHARD B. 1977年09月19日
    In a floatable breakwater, one or more flexible membranes are suspended below a floatable, open grid. An outer membrane is formed into a trough. Inner membrane components serve to define multiple ports and reduce the energy of the wave as water is mov...
  • [发明专利]US19770804458 _ MAGNA ENERGY, INC. 1977年06月07日
  • [发明专利]JP19770145817 _ MITSUBISHI HEAVY IND LTD 1977年12月05日
    PURPOSE:To obtain electric energy, by changing energy produced by wind power equipment into water potential energy and driving hydraulic power equipment by the water potential energy. CONSTITUTION:An electric generator is driven by the rotation of a w...
  • [发明专利]JP19770141959 _ MITSUI SHIPBUILDING ENG 1977年11月25日
  • [发明专利]JP19770151234 _ OTAKE TOUSHIROU 1977年12月16日
  • [发明专利]JP19770058226 _ BSP INT FOUNDATION 1977年05月21日
  • [发明专利]GB19760010148 _ INSITUFORM (PIPES & STRUCTURES) LT 1977年06月09日
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