Exterior mirror assembly with actuator

  • US 9,242,607 B2
  • Filed: 06/29/2015
  • Issued: 01/26/2016
  • Est. Priority Date: 10/31/2011
  • Status: Active Grant
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First Claim
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1. An exterior rearview mirror assembly for a vehicle, said exterior rearview mirror assembly comprising:

  • a mounting portion mountable at a side of a vehicle;

    a mirror head portion adjustably mounted at said mounting portion;

    a reflective element at said mirror head portion;

    an actuator operable to impart pivotal movement of said mirror head portion relative to said mounting portion and about a generally vertical pivot axis to pivotally adjust said mirror head portion relative to the side of the vehicle at which said mounting portion is mounted;

    wherein said actuator comprises at least two motors and wherein said at least two motors are operable in tandem to cooperatively rotatably drive a common drive gear of a gear system to pivot said mirror head portion relative to said mounting portion;

    wherein said common drive gear is interconnected with an attaching portion of said actuator that attaches at one of said mirror head portion and said mounting portion, and wherein rotation of said common drive gear imparts a rotation of said mirror head portion relative to said mounting portion;

    wherein output speeds of said at least two motors are synchronized; and

    wherein, during operation of said actuator, a shutoff circuit is operable to determine rotational movement of a motor output shaft of at least one of said motors and, responsive to a determination of the rotational movement being below a threshold speed, said shutoff circuit deactivates said at least one of said motors irrespective of current draw by said at least one of said motors.

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