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Ventilation > Having Outlet Airway > With Air Pump > Having Readily Movable Air Regulating Louver,damper, Or Cover > Including Backdraft Preventer Including Backdraft PreventerIncluding Backdraft Preventer patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.04/13/06 - 20060079172 - Common filtration unit for building makeup air and emergency exhaust A building protection system comprises a filtration unit, an air handling unit, an emergency exhaust subsystem, a first damper positioned between the filtration unit and the air handling unit, and a second damper positioned between the emergency exhaust subsystem and the filtration unit. The first damper is selectively opened and ... 09/15/05 - 20050202778 - Wall-mounted exhaust vents Vent for a duct terminating proximate a wall with a self-leveling feature. The vent includes a first member connectable to the wall in engagement with the duct, a second member rotatably connected to and at least partially in front of the first member and at least one flap pivotally mounted ... 07/07/05 - 20050148295 - Vent apparatus A vent provides a route for gas flow through a building envelope. The vent comprises a substantially hollow cover member having a cover member surface which defines a vent passageway. The vent may comprise a substantially hollow adapter member. The adapter member is coupleable to the cover member at its ... ### FreshPatents.com Support |