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  • [发明专利]US19740503057 _ FA. INGENIEUR GUNTER KLEMM SPEZIALUNTERNEHMEN FUR BOHRTECHNIK 1974年09月04日
    This disclosure relates to a percussion tool which includes a housing having a chamber reciprocally mounting a piston with first and second pressure ducts at opposite ends of the latter and a control duct therebetween as well as a return duct in fluid...
  • [发明专利]US19740509184 _ NIHON SPINDLE SEIZO KABUSHIKI KAISHA 1974年09月25日
    In a hydraulic oscillator having a main body equipped with inflow and outflow ports wherein a vibratory member is actuated to cause self-excited vibration by pressurized oil passing from the inflow port inside an oil pressure chamber so as to generate...
  • [发明专利]US19740430218 _ PLANET CORPORATION 1974年01月02日
    A valve assembly for controlling the acceleration and deceleration rates of a fluid motor used for relatively rapid, cyclical, intermittent operation. The valve assembly is mechanically coupled to the drive and/or motor output shaft and is in fluid co...
  • [发明专利]US19740462903 _ THE UNITED STATES OF AMERICA AS REPRESENTED BY THE UNITED STATES NATIONAL AERONAUTICS AND SPACE ADMINISTRATION OFFICE OF GENERAL COUNSEL-CODE GP 1974年04月22日
    An impervious metal sheet is placed on top of a pair of flat grid blanks which are clamped together at their edges. An elastic sheet contacts the bottom grid blank, and a second impervious metal sheet is inserted between the two grid blanks if the gri...
  • 5.
    [发明专利]JP19740054998U _ 1974年05月16日
  • 6.
    [发明专利]JP19740025330 _ 1974年03月06日
  • 7.
    [发明专利]JP19740108215U _ 1974年09月10日
  • 8.
    [发明专利]JP19740063931 _ 1974年06月07日
  • 9.
    [发明专利]JP19740005674 _ 1974年01月10日
    A method for fastening by brazing (hard-soldering) the blades of a rotor for a hydrodynamic torque converter or the like, in which the blades are fastened with respect to an inner shell by means of lugs which are extended through corresponding slots i...
  • 10.
    [发明专利]JP19740135409 _ 1974年11月22日
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