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  • [发明专利]US19910743271 _ VAN DICK, ROBERT C. 1991年08月09日
    An ion beam and jet stream motor useful as motive and propulsive forces is formed by generating a collimated ion beam and projecting the collimated ion beam into an electrically charged, tubular electrode. This is done with an ion beam motor having a ...
  • [发明专利]JP19910257077 _ ISHIKAWA KAZUO 1991年09月09日
    PURPOSE:To sustain the torque at a constant value by forming a disc spring, whose cross section is circular in free condition, in spiral shape with the longitudinal direction as the shaft direction, and mounting it, with one end intact in free conditi...
  • [发明专利]EP19910302180 _ ACTRONICS INCORPORATED 1991年03月14日
    An improved actuator of the type in which a piston is translatable in a piston housing in response to an expandable working fluid in fluid communication with one end of the piston. An improved sealing assembly prevents leakage of working fluid from th...
  • 4.
    [发明专利]JP19910044154U _ 1991年05月15日
  • [发明专利]US19910761546 _ GEARTECH CO., LTD. 1991年09月18日
    The present invention is concerns with a spring drive used as a driving power source for a moving toy. The spring drive has a windup pinion of which at least the top of one end is formed at its rotation axis as a small diameter end having a diameter s...
  • 6.
    [发明专利]JP19910079411U _ 1991年09月05日
  • [发明专利]JP19910027070 _ AISIN SEIKI CO LTD 1991年02月21日
    PURPOSE:To fill a micro working fluid space with low-boiling point fluid and light-thermal conversion substance easily and completely. CONSTITUTION:In a thermally-operated actuator which consists of two micro cups 1A, 1B and an optical fiber 2, low-bo...
  • 8.
    [发明专利]JP19910027070 _ AISHIN SEIKI KK 1991年02月21日
    PURPOSE:To fill a micro working fluid space with low-boiling point fluid and light-thermal conversion substance easily and completely. CONSTITUTION:In a thermally-operated actuator which consists of two micro cups 1A, 1B and an optical fiber 2, low-bo...
  • 9.
    [发明专利]JP19910079411U _ 1991年09月05日
  • [发明专利]EP19910302180 _ ACTRONICS INCORPORATED 1991年03月14日
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