Single-louver damper with double seal

A louver damper device for controlling fluid flow in a conduit having an upper interior wall, a lower interior wall, and interior side walls, said louver damper device comprising:

• a. a unitary single-walled louver formed with an interior sealing conduit, a first modified perimeter region for interfacing with the upper interior wall of said conduit, and a second modified region for interfacing with the lower interior wall and the interior side walls;
• b. louver interface means attachable to the interior upper, lower, and side walls of said conduit;
• and
• c. actuation means connected to said louver for pivoting said louver within said conduit,
• wherein said first modified region of said louver is designed to engage said louver interface means attached to the upper interior wall when said damper device is actuated into a closed position so as to form an upper sealing chamber,
• wherein said second modified region is designed to engage with said louver interface means attached to the lower interior wall and the interior side walls when said damper device is actuated into a closed position so as to form a lower sealing chamber and a pair of side sealing chambers, and
• wherein when said damper device is actuated into a closed position, said interior sealing conduit, said upper sealing chamber, said lower sealing chamber, and said pair of side sealing chambers are interconnected.

A louver damper device for controlling fluid flow in a conduit having interior walls, said louver damper device comprising:

• a. a unitary single-walled louver formed with an interior sealing conduit and a modified perimeter region for interfacing with the interior walls of said conduit;
• b. louver interface means attachable to said interior walls of said conduit;
• and
• c. actuation means connected to said louver for pivoting said louver within said conduit,
• wherein said modified perimeter of said louver is designed to engage said louver interface means when said damper device is actuated into a closed position so as to form a perimeter sealing chamber, and
• wherein when said damper device is actuated into a closed position, said interior sealing conduit and said perimeter chamber are interconnected.

A device for sealing an interface between a damper louver and an interior wall of a conduit used to transfer fluid, said device comprising:

• a. a conduit interface component attachable to a perimeter of the damper louver, said conduit interface component including a first coupling leg and a second coupling leg of substantially equal length;
• and
• b. a flexible hub affixable to said interior wall of said conduit,
• wherein said first coupling leg, said second coupling leg, and said flexible hub are arranged such that when the louver is actuated into a blocking position, said first coupling leg first contacts said flexible hub and remains in contact with said flexible hub when said second coupling leg comes in contact with said flexible hub.