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Motor driven retractable outside mirror for vehicle

  • US 5,210,651 A
  • Filed: 11/15/1990
  • Issued: 05/11/1993
  • Est. Priority Date: 11/17/1989
  • Status: Expired due to Fees
First Claim
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1. A vehicle door mirror assembly comprising:

  • a base unit for mounting said mirror assembly on a vehicle body;

    a mirror unit mounted on said base unit for swinging movement about a swing axis on the base unit;

    an ultrasonic motor, mounted on said mirror unit, for supplying power to force said mirror unit to swing, said ultrasonic motor including a drive shaft, a rotor for rotating said drive shaft, and a stator having an elastic member and a piezoelectric vibrator for generating a circular traveling wave, and a biasing means for pressing said rotor on said stator, said stator being fixed to said mirror unit;

    a fixed gear fixed to said base unit; and

    a speed reducing gear arrangement mounted on said mirror unit, said speed reducing gear arrangement including a driving gear driven by said drive shaft of said ultrasonic motor, and a driven gear means for being driven by said driving gear at a rotational speed lower than a rotational speed of said driving gear and said driven gear means is in engagement with said fixed gear to thereby rotate around said fixed gear and cause said mirror unit to rotate about said swing axis.

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