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7610719 |
Active brake release device attached to the exterior of a door controller
There is provided an active brake release device attached to the exterior of a door controller having a first electromagnet, in which a sliding portion can slide to activate a sliding bar when the...
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7537038 |
Release control mechanism for emergency exit
A release control mechanism installed in a rolling door-controlled emergency exit, which includes a driving mechanism, a release control lever provided outside the driving mechanism for releasing a...
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7490654 |
Rolling door assembly having pass door arrangement
A rolling door assembly for selectively covering an opening in a building includes a shutter roller rotatable about a substantially horizontal axis and a flexible panel windable on and off the...
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7448426 |
Failsafe door closing device of a fire proof rolling door
A power-off door closing device of fire proof rolling door in which the rolling door slides down to close by its own weight under abnormal power-off condition by brake-releasing action or by...
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7299848 |
Closure member control systems, including door control systems for barrier housings, and associated methods
Closure member control systems, including door control systems for barrier housings, and associated methods are disclosed. One aspect of the invention is directed toward a closure member control...
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7299847 |
Fire door control system and method
A fire door control system permits user input during regular use and during alarm conditions. The system utilizes primary and secondary power sources and incorporates a variety of preventive...
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7293805 |
Safety door central release device
This invention relates to a type of safety door central release device which can be used to close the safety door automatically when electric power is disrupted. It comprises a cord that is tied to...
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7275631 |
Engaging/disengaging fail-safe door closing device for rolling fire door and door machine having same
There is disclosed an engaging/disengaging fail-safe door closing device for a rolling fire door, provided between a power device and a speed reducing device of a door machine, including an...
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7138912 |
Movable barrier operations method and apparatus
Movement of a movable barrier ( 10 ) such as, for example, a vertically-dropping fire door, can be controlled in an informed manner and with greater flexibility regarding the manner of movement...
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7028742 |
System and method for sealing openings in response to smoke, noxious fumes, or contaminated air using a roll-down barrier
A system and method for rapidly and reliably sealing off a selected opening from the passage of smoke, noxious fumes, or contaminated air includes a powered clutch and viscous governor that...
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6981538 |
Positional control device for sectional doors
A positional control device is provided to prevent accidental drifting of an overhead sectional door upward or downward from a fully opened, partly opened or fully closed position. The device...
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6848556 |
Movable barrier operator disconnect apparatus
A movable barrier operator ( 10 ) has a first disconnect mechanism ( 20 ) and a second disconnect mechanism ( 35 ) wherein either mechanism can be used to cause the output drive of the operator to...
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6484784 |
Door controlling device
A door, such as a fire door or a security gate, for blocking a throughway or opening in an exterior or interior wall of a building, such as a doorway or countertop window, has an open position and...
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6283189 |
Swinging folding door and a swinging folding gate; and a swinging folding door with an emergency opening device and a swinging folding gate with an emergency opening device
An emergency opening device for a swinging folding door or a swinging folding gate, using an electric motor drive with a switchable electromagnetic coupling for closing and opening the door panels....
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6155324 |
Apparatus and method for operating a door
A method and apparatus according to various aspects of the present invention is configured to automatically reset a rollable fire door curtain in the raised position. In one embodiment, a brake is...
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5896907 |
Rolling fire door including a door hold-open/release system
A rolling fire door includes a door hold-open/release system that includes an electromagnet which is energized by a controller when the door is in the open position. The energized electromagnet...
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5850865 |
Rolling fire door with delayed closing mechanism
A delayed closing mechanism for a rolling fire door is provided wherein an AC solenoid having its sliding rod pivoted to one end of a connecting rod which is also pivoted at a central portion while...
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5773947 |
Position detector and position control method for a moving body
In a position detector, a ring gear rotates with a motor output shaft and a specified rotation position is detected by a move contact and fixed contacts. When the output shaft rotates thereafter,...
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5577541 |
Rolling door assembly having pass door arrangement
A rolling door assembly for selectively covering an opening in a building includes a shutter roller rotatable about a substantially horizontal axis and a flexible panel windable on and off the...
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5482103 |
Door apparatus with release assembly
A closure apparatus for closing an opening in a partition with a frame disposed around the opening includes a drum member rotatably mounted to the partition at the top end of the opening. It also...
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5253693 |
Hold and release mechanism for a fire door spring tension adjusting wheel
A hold and release mechanism for a fire door spring tension adjusting wheel includes a finger which is retractable when the adjusting wheel is rotated in a direction to increase the tension of the...
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5245879 |
Fail-safe fire door release mechanism having automatic reset
A resettable fail-safe fire door release mechanism which allows normal powered operation of a fire door is disclosed. A solenoid having a first open state in the absence of an applied electric...
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4785293 |
Alarm system prior to firedoor drop
A signalling system utilized in a firedoor control system. For warning and alerting personnel of the immanate (seconds) closing of a firedoor, to avoid injury of such personnel in the vicinity of...
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4727919 |
Safety and emergency actuator device for a concertina type door
A counterweight (12) provided at the end of a shaft (8) for winding up the door-raising belts (3) of a concertina type door. The counterweight (12) is designed to open the door to a fraction of its...
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4664170 |
Rolling firedoor
A rolling firedoor having a closure drum on which a closure is wound, and a chaindrive for rotating the drum to raise or lower the closure. The chaindrive is disconnected from the drum during a...
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4428278 |
Emergency ventilation control apparatus for animal confinement house
An apparatus responsive to electric power failure for opening curtains or doors normally covering ventilation openings in a confinement house of the type used for raising poultry and livestock is...
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4195384 |
Self-resetting, cable operated translating drive link
A novel telescoping heat responsive releasing device is described wherein a mounting member on which heat responsive and locking means are mounted slidingly enages a pawl member which is movable...
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4130156 |
Time delay fire closure releasing device
A time delayed releasing device serves to hold fire closures from being actuated during periodic testing and momentary power failure while still permitting the closure to respond to power outage of...
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3986559 |
Fire escape device
A plurality of sections of fireproof material are movably mounted on the ceiling of a room in the area of a window in the room. The sections are shaped to enclose a predetermined area around the...
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3981343 |
Counterbalancing mechanism for rolling doors
A counterbalancing mechanism for an articulated rolling door mounted for movement horizontally away from the doorway when the door is opened, with the weight of the vertical portion of the door...
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3977456 |
Volume controlled damper
A combination grill, air damper and fire damper is provided with a means for adjusting the volume of flow of air through the damper.
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3973173 |
Curtain control system for poultry houses
The side curtains of a poultry house are automatically opened upon a power failure in the electrical circuit of the ventilating system. An electrical monitoring circuit activated responsive to such...
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3915377 |
Curtain control device for poultry or livestock house
A curtain control device is provided for use with a poultry or livestock house having an electrically operated forced ventilation system and/or having adjustable curtains along the side walls...
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3866656 |
Folding blade fire damper
A motor operated geared pulley system is provided for retracting the blades of a folding blade fire damper. Drive means are provided attached to the motor operated system to counteract the...
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3618656 |
FOLDING DOOR APPARATUS
Folding door apparatus including at least four foldable panels hinged together in accordion fashion for vertical movement relative to the opening of a structure such as a garage; each pair of door...
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3559716 |
TEMPERATURE-ACTUATED OVERHEAD DOOR
A sliding overhead door is normally maintained in its up position by means of at least two helical torsion springs arranged to apply torque to a rotatable shaft which in turn applies a lifting...
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3345775 |
Fire door
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3160250 |
Fire-operated safety devices
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3007342 |
Rolling door operating mechanism
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