End seal for damper blades

Abstract

End caps are attached to the end of each blade of a damper. When in the closed position, the end caps seal the space between the blade and frame. Sealing fins may extend from the end cap to further enhance the sealing capability. The end caps are easily replaced if worn and effectively prevent air from flowing between the frame and end of the blades.

1 . A damper comprising
 a frame,   at least one blade retained in the frame, the blades movable between an open and closed position,   an end cap attached to an end of the at least one blade.   
   
   
       2 . The damper of  claim 1 , further comprising
 an end cap on each end of the at least one blade.   
   
   
       3 . The damper of  claim 2 , wherein
 the end caps are made of resilient material.   
   
   
       4 . The damper of  claim 2 , further comprising sealing fins extending from the end caps. 
   
   
       5 . The damper of  claim 1 , further comprising a plurality of blades. 
   
   
       6 . The damper of  claim 1 , wherein the at least one blade has a first wall and a second wall,
 a space between the first and second wall, a projection on the end cap, the projection fitting into the space to retain the end cap to the blade.   
   
   
       7 . A blade for a damper comprising
 a first side and a second side,   a top edge, a bottom edge, a first end and a second end,   an end cap attached to each end,   the end caps made of resilient material.   
   
   
       8 . The blade of  claim 7 , further comprising
 a space between the first end second side, a projection on the end cap, the projection fitting into the space to retain the end cap to the blade.   
   
   
       9 . The blade of  claim 7 , further comprising sealing fins extending from the end caps.