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US 2003/0154656 A1Published application
Barrier movement control safety method and apparatus
AssigneeThe Chamberlain Group, Inc.
InventorsJames J. Fitzgibbon, Edward Laird
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Abstract
A barrier mount system is disclosed which opens and closes a barrier such as a gate or garage door in response to user generated commands. Obstruction detection apparatus is provided for safety of operator. When an obstruction is sensed, the barrier movement system is inhibited from responding to user generated commands until a predetermined event occurs. The event may be passage of a predetermined amount of time or barrier movement of a particular amount.
Claims15
A barrier movement system for opening and closing a barrier comprising:
- a motor connected to the barrier;
- a controller responsive to user initiated signals for controlling the motor to move the barrier to open and closed positions;
- user controlled apparatus for transmitting user initiated signals to the controller to control barrier movement;
- obstruction sensing apparatus for generating an obstruction signal representing the detection of an obstruction to barrier movement in a first direction;
- and
- the controller responds to the obstruction signal by stopping movement of the barrier in the first direction and inhibiting response to the user initiated signals.
3 more elements
Dependencies are inferred from the claim text.