Claims
- 1. A movable barrier operator comprising:an electric motor; a transmission connected to the motor to be driven thereby and connectable to a movable barrier to move the barrier between an open position and a closed position; a position detector for sensing a position of the barrier between the open and closed positions; a learn routine for determining a minimum reversal position of the barrier relative to a close limit, wherein the minimum reversal position of the barrier position is located a short distance more toward the open position than the close limit; a controller responsive to the position detector for controlling the motor, wherein when the position detector senses the position of the barrier at the minimum reversal position, the controller causes the motor to continue to operate to drive the barrier to the close limit.
- 2. A movable barrier operator according to claim wherein the electric motor comprises a DC motor.
- 3. A movable barrier operator according to claim 1 wherein the electric motor comprises an AC motor.
- 4. A movable barrier operator according to claim 1 wherein the minimum reversal position is located approximately one inch above the close limit.
- 5. A movable barrier operator according to claim 1 wherein the close limit corresponds to a location of a floor.
- 6. A movable barrier operator comprising:a motor connectable to a movable barrier and energizable to move the barrier between an open position and a closed position with respect to a barrier opening; a position detector for sensing a position of the barrier; a controller responsive to input commands and the position detector for controlling the energizing of the motor to control the movement of the barrier; apparatus for defining a minimum reversal position of the barrier at a position near a closed limit of the barrier; and the controller responsive to the position detector for controlling the motor, wherein when the position detector senses the position of the barrier at the minimum reversal position, the controller causes the motor to continue to operate to drive the barrier to the closed limit.
Parent Case Info
This is a continuation of prior application Ser. No. 09/535,221 filed Mar. 27, 2000, now U.S. Pat. No. 6,278,249, which is a divisional application of Ser. No. 09/161,840 filed Sep. 28, 1998, now U.S. Pat. No. 6,172,475.
This application contains two (2) identical compact discs (CD-ROMs) each containing a computer program listing appendix for the above-captioned application. These discs are in IBM-PC machine format and are MS-Windows operating system compatible. The file on each disc is named “LAP56 recreated.txt”, is 152 KB in size and was created on Jan. 30, 2001.
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Continuations (1)
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Number |
Date |
Country |
Parent |
09/535221 |
Mar 2000 |
US |
Child |
09/840601 |
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US |