GASTIGHT DAMPER HAVING AN INFLATABLE SEAL

摘要

A structural member defining an opening. Pivotally mounted within the opening is a damper blade, the blade being movable between open and closed; means for so moving are also provided. An inflatable sealing member having a sealing surface for contact with the edge of the damper blade and responsive to changes in pressure within the sealing member is attached in sealing relationship to an internal surface of the structural member and is positioned in a plane transverse to gas flow through the opening. There is further provided a means for inflating and deflating the sealing member.