Patent ID: 8729837
Filing Date: 2014-05-20
Classification: E05F,E05Y,G05B

Abstract:
1. A method of controlling the motion of a moveable door, comprising: detecting a current position of a door; determining a direction that the door is moving with respect to a closed position of the door; determining a distance between the detected current position of the door and the closed position of the door if the direction that the door is moving is determined to be toward the closed position; decreasing a maximum amount of force that is available to the door for its motion if the distance between the detected current position and the closed position is less than a threshold value; determining whether the detected current position of the door is ahead of or behind an expected position of the door; and decreasing the maximum amount of force that is available to zero if the detected current position of the door is determined to be behind the expected position of the door and the distance between the detected current position and the closed position is less than the threshold value.