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Swing-door operator system

  • US 4,727,679 A
  • Filed: 04/02/1987
  • Issued: 03/01/1988
  • Est. Priority Date: 04/02/1987
  • Status: Expired due to Term
First Claim
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1. A door operator system for controlling the operation of a pivotally moveable door comprising:

  • motor means including a drive shaft for selectively bi-directionally rotatably driving said drive shaft;

    control means responsive to a plurality of input signals for selecting a voltage value from an array of pre-established voltages and deriving a motor voltage from said selected voltage value and generating a desired voltage polarity signal, said control means comprising means for applying said polarity signal and said selected voltage value to energize said motor means for driving said drive shaft at a selected speed and direction;

    transmission means including an operator shaft for translating rotatable motion of said drive shaft to a corresponding reduced speed rotatable motion of said operator shaft; and

    linkage means connecting said operator shaft in generally fixed angular relationship therewith and comprising connector means for pivotally connecting with an associated door, said operator shaft angularly driving said linkage means for pivotally opening and closing the door in accordance with the operation of said motor means.

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