Door actuator for cooling a fire door
AssigneeMarioff Corporation Oy
InventorGöran Sundolm
Life of this patent
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Abstract
A hydraulic fire door, especially a sliding door, which can be selectively opened or closed by an actuator. In order to ensure a particularly fire resistant fire door without the heat resistance of the basic structure thereof having to be particularly fire resistant, the actuator is arranged to supply aqueous liquid to the fire door in order to cool it using the aqueous liquid.
Claims29
A hydraulic fire door which can be selectively opened or closed, the fire door being provided with an actuator (3, 3′) for moving the door between an opened position and a closed position, wherein the actuator (3, 3′) is arranged to supply aqueous liquid to the fire door in order to cool the fire door using the aqueous liquid.
A fire protection system comprising a fire extinguishing system and a hydraulic fire door which can be selectively opened or closed, the fire door being provided with an actuator (3, 3′) for moving the fire door between an opened position and a closed position, wherein the actuator (3, 3′) is arranged to feed aqueous liquid to the fire door in order to cool the fire door using the aqueous liquid.
Dependencies are inferred from the claim text.