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Door closure system

  • US 20060289497A1
  • Filed: 08/08/2005
  • Published: 12/28/2006
  • Est. Priority Date: 05/16/2005
  • Status: Active Grant
First Claim
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1. A door structure, said door structure comprising a door selectively movable between open and closed conditions;

  • a frame formed from spaced side members; and

    a top member which, in combination with a floor, define the opening in which the door is positioned, the door when closed, formed by a first wall forming an external surface at a first side of the opening and a second, spaced wall defining an external surface to the second side of the opening, said first and second walls defining a cavity between the same which extends substantially across the area of the opening and air movement means are provided to cause the movement of air into and through the said cavity and wherein the air is introduced into the cavity from a port located on one of the side members of the door frame and towards the lower edge of the door when the door is closed.

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