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Gate operator with extensible actuating arm

  • US 5,804,938 A
  • Filed: 04/01/1996
  • Issued: 09/08/1998
  • Est. Priority Date: 04/01/1996
  • Status: Expired due to Fees
First Claim
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1. A gate operator for moving a gate between opened and closed fixed end positions and where one said end positions may have limited access space beyond that end position precluding location of a ground mounted operator in that limited access space, said gate operator comprising:

  • a) drive means providing a source of driving power;

    b) an actuating arm powered by said drive means and having a rotatable shaft and an extensible arm portion which is extensible and retractable in response to rotatable movement of the rotatable shaft to move said gate between the fixed end positions and which causes movement to one end position in response to extensible movement and to the other end position in response to retracting movement;

    c) means connecting said rotatable shaft to said extensible arm portion which converts the rotating motion of the rotatable shaft to a linear extensible and retractable movement of said extensible arm portion and which is also aligned with said rotatable shaft;

    d) sensor means operatively associated with said rotatable shaft to generate counts of rotation in response to rotatable movement of the rotatable shaft; and

    e) control means operatively connected to said drive means and sensor means and receiving the counts of rotation and measuring the distance of movement between one end position and the other end position and storing a distance count representative of that distance of movement, said control means causing said drive means to move the gate between the said one end position to said other end position only for the stored distance count on each subsequent occasion when the gate is moved from that one end position to the other end position.

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