Patent ID: 7694471

Claim:
An astragal boot for mounting onto a lower end of an astragal disposed at a free end of a semi-active door in a double door set disposed over a threshold, said astragal boot comprising: a platform; a first and a second lateral fin spaced from each other and projecting downwardly from said platform for sealing engagement with the threshold; a primary fin extending from said first lateral fin to said second lateral fin with said primary fin, said first and second lateral fins, and said platform defining a primary cavity with an auxiliary fin disposed in said primary cavity; said platform defining a hole extending through the platform and into said primary cavity between said first and second lateral fins for slideably receiving a lock bolt engaging the threshold to secure the semi-active door to the threshold in a closed position; said auxiliary fin disposed in said primary cavity and extending from said first lateral fin to said second lateral fin dividing said primary cavity into subcavities and defining an auxiliary fin edge extending from said first lateral fin to said second lateral fin for sealing engagement with the threshold with said auxiliary fin including a first and second leg portion defining a first and second edge section of said auxiliary fin edge, respectively, said first leg portion extending along a first direction defining said auxiliary fin edge along said first direction and said second leg portion extending along a second direction at an obtuse angle relative to said first direction and defining said auxiliary fin edge along said second direction.