US 9,851,121 B1Granted

Heat-actuated fire damper sealing apparatus

OwnerLynn Oieninventor

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Abstract

A heat activated sealing apparatus for closing and locking a plurality of ventilation damper blades of a ventilation framework includes a fire detection assembly for detecting a fire condition and an actuator. A damper closure assembly includes an axle in communication with the actuator of the fire detection assembly and operatively coupled to the plurality of dampers of the ventilation framework, the axle being selectively rotatable between a start configuration at which the plurality of ventilation dampers are at the open configuration and a deployed configuration at which the plurality of ventilation dampers are at the closed configuration. The damper closure assembly includes a locking assembly movable between an unlocked configuration allowing rotatable movement of the axle and a locked configuration not allowing rotatable movement of the axle. The locking assembly is movable to the locked configuration only when exposed to a predetermined amount of heat from the fire condition.

Claims19

Dependent claims

A heat activated sealing apparatus configured to automatically close and lock a plurality of ventilation damper blades of a ventilation framework that are movable between an open configuration and a closed configuration when a fire event is detected, said heat activated sealing apparatus, comprising:

a fire detection assembly capable of detecting a fire condition;
a damper closure assembly including:
an actuator in electrical communication with said fire detection assembly so as to be energized when said fire detection assembly detects the fire condition;
an elongate axle having a proximal end in operative communication with said actuator and a distal end operatively coupled to the plurality of dampers of the ventilation framework, said axle being selectively rotatable between a start configuration at which the plurality of ventilation dampers are at the open configuration and a deployed configuration at which the plurality of ventilation dampers are at the closed configuration;
and
a locking assembly slidably movable between an unlocked configuration allowing rotatable movement of said axle and a locked configuration not allowing rotatable movement of said axle;
wherein said locking assembly is movable to said locked configuration only when exposed to a predetermined amount of heat from the fire condition;
wherein said locking assembly includes:
a mounting plate having a planar configuration and defining an aperture proximate an upper edge, said axle extending through said aperture;
a locking plate positioned adjacent said mounting plate and defining an axle opening aligned with said aperture such that said axle is configured to extend through said aperture and said axle opening, said axle opening including an upper section having dimensions that allow rotation of said axle and a lower section having dimensions that do not allow rotation of said axle;
wherein said locking plate is selectively vertically movable such that said either said upper section or said lower section is in communication with said axle.

8 more elements

A heat activated sealing apparatus configured to automatically close and lock a plurality of ventilation damper blades of a ventilation framework that are movable between an open configuration and a closed configuration when a fire condition is detected, said sealing apparatus, comprising:

a fire detection assembly capable of detecting the fire condition;
a damper closure assembly including:
an actuator in communication with said fire detection assembly and configured to be energized when said fire detection assembly detects the fire condition;
an elongate axle having a proximal end in operative communication with said actuator and a distal end operatively coupled to the plurality of dampers of the ventilation framework, said axle being selectively rotatable between a start configuration at which the plurality of ventilation dampers are at the open configuration and a deployed configuration at which the plurality of ventilation dampers are at the closed configuration;
and
a locking assembly slidably movable between an unlocked configuration allowing rotatable movement of said axle and a locked configuration not allowing rotatable movement of said axle;
wherein said locking assembly includes:
a mounting plate having a planar configuration and defining an aperture proximate an upper edge, said axle extending through said aperture;
a locking plate positioned adjacent said mounting plate and defining an axle opening aligned with said aperture such that said axle is configured to extend through said aperture and said axle opening, said axle opening including an upper section having dimensions that allow rotation of said axle and a lower section having dimensions that does not allow rotation of said axle;
wherein said locking plate is selectively vertically movable such that said either said upper section or said lower section is in communication with said axle;
wherein said locking assembly is movable to said locked configuration only when exposed to a predetermined amount of heat from the fire condition.

8 more elements

Dependencies are inferred from the claim text.