Multimatic Inc.

Other

Michael Johnson

Richard J Hellinga

An apparatus for opening and closing an overhead door, having a door assembly for mounting to the overhead door, and an operator for securely engaging the door assembly. The operator has a chassis, and a cable reel rotatably mounted to the chassis and coupled to a main cable. When the main cable is coupled to the door assembly, as the cable reel is rotated in a first direction, the door assembly is drawn towards the operator so as to close the door. The apparatus may include a latch assembly for securing the door assembly to the operator when the door is closed, and a latch release mechanism for selectively disengaging the latch assembly so as to disengage the door assembly from the operator. The overhead door may be biased so that when the latch assembly is disengaged, the overhead door automatically opens.

Apparatus for opening and closing overhead sectional doors

A method and system for controlling the descent of a moveable element pivotally attached to a rigid structure. The moveable element is pivotally attached to the rigid structure, and is then pivotally connected to a compressible strut, which is attached to a linkage pivotally connected to the rigid structure. The descent of the moveable element is pivotally controlled using a microcontroller and a motor attached to the linkage, and the control path for the linkage is selected based on a comparison of the angle between the linkage and the rigid structure and the angle between the moveable element and the rigid structure.

Method for controlling the speed of closing of a movable element

A method and system for controlling the descent of a moveable element pivotally attached to a rigid structure. The moveable element is pivotally attached to the rigid structure, and is then pivotally connected to a compressible strut, which is pivotally attached to a linkage pivotally connected to the rigid structure. The descent of the moveable element is controlled using a microcontroller and a motor attached to the linkage, and the control path for the linkage is selected based on a comparison of the angle between the linkage and rigid structure and the angle between the moveable element and the rigid structure.

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Toronto, Canada

Michael Johnson