Patents Represented by Attorney, Agent or Law Firm Watts, Hoffman, Fisher & Helinke Co., L.P.A.
  • Anti-backdraft shutter assembly for an axial flow fan
    Patent number: 6454247
    Abstract: An anti-draft shutter assembly for an axial flow fan fitted to a duct. The assembly includes at least one counterbalanced flap supported downstream of airflow from the fan when in operation, and at least one of the flaps being pivotally supported outside the perimeter of the duct. The flap is biased by a counterbalance weight toward a duct closing position to close the duct when the fan is not operating. In the preferred embodiment, at least one flap is held in the closed position by a magnetic catch on the flap.
    Type: Grant
    Filed: December 7, 2000
    Date of Patent: September 24, 2002
    Assignee: FF Seeley Nominees Pty Ltd
    Inventor: Gabor Ujvari