Patent ID: 7271560
Filing Date: 2007-09-18
Classification: E05F,E05Y

Abstract:
1. An assembly for moving a barrier from one of a closed position and an opened position to the other of the closed position and the opened position, the assembly comprising: a motor connectable to the barrier and configured to supply one of a first power and a second power, greater than the first power, to the barrier; and a controller configured to determine a first time period and a second time period, to control the motor to supply the first power to move the barrier towards the closed position from the opened position, to supply the first power for the first determined time period to move the barrier towards the opened position from the closed position, to supply the second power intermittently for the second determined time period after the barrier has started moving towards the opened position and before arriving at the opened position, and to return to supply the first power to continue moving the barrier towards the opened position.