Patent ID: 7000668

Claim:
A barrier assembly for sealing off an opening having a top portion and side portions, comprising: a housing mountably adjacent to the top portion of the opening; a curtain assembly coupled to the housing, the curtain assembly being movable between a stored position and a deployed position, the curtain assembly in the stored position being contained in the housing, and the curtain assembly in the deployed position sealably covering the opening; a coupler coupled to the curtain assembly and being movable between retaining position and a released position, the coupler in the retaining position configured to retain the curtain assembly in the stored position until the coupler is moved to the released position, the coupler in the released position configured to allow the curtain assembly to move toward the deployed position, the coupler operatively coupled to a power source to move to the released position in response to a power failure; a deployment governor connected to the curtain assembly and configured to control deployment speed of the curtain assembly as the curtain assembly moves toward the deployed position; and a rewind control switch configurable to automatically cause the curtain to be moved to the stored position with a resumption of power after the power failure.