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AUTOMATIC DOOR OPENER

  • US 20120023824A1
  • Filed: 07/28/2011
  • Published: 02/02/2012
  • Est. Priority Date: 07/29/2010
  • Status: Abandoned Application
First Claim
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1. A door opener for opening a door having an external surface comprising:

  • a screw mounted for rotary motion and a carriage mounted on the screw such that rotation of the screw causes motion of the carriage along the screw;

    a motor for rotating the screw;

    an actuator arm having a first end and a second end, said actuator arm being operatively connected to the carriage such that movement of the carriage causes the actuator arm to move between a retracted position where the door is closed and an extended position where the door is open, said first end of the actuator arm being in contact with but not connected to the external surface of the door such that the first end of the actuator arm rides over the external surface of the door.

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