Damper system

Abstract

A damper system including a conduit body, a wall assembly, and a first blade. The conduit body includes an opening. The wall assembly includes a first wall and a second wall disposed in the conduit body extending across the opening. The first blade is disposed within the conduit body between the first wall and the second wall.

What is claimed is: 
     
         1 . A damper system, comprising:
 a conduit body including an opening;   a first vertical wall and a second vertical wall disposed in the conduit body, the first and second vertical walls extending across the opening; and   a first blade disposed within the conduit body between the first vertical wall and the second vertical wall, the first blade being rotatable between an open and a closed position.   
     
     
         2 . The damper system of  claim 1 , wherein the first and second vertical walls each have a height that is at least equal to a height of the first blade in an open position. 
     
     
         3 . The damper system of  claim 1 , further comprising a second blade disposed in the conduit body between the first vertical wall and the second vertical wall, the second blade being rotatable from a closed to an open position. 
     
     
         4 . The damper system of  claim 3 , further comprising:
 a third vertical wall disposed in the conduit body between the first blade and the second blade.   
     
     
         5 . The damper system of  claim 3 , further comprising:
 a third blade disposed between the conduit body and the first vertical wall; and   a fourth blade disposed between the conduit body and the second vertical wall.   
     
     
         6 . The damper system of  claim 5 , further comprising an actuator assembly configured to open the third and fourth blades after the first and second blades are moved to the open position. 
     
     
         7 . The damper system of  claim 6 , wherein the actuator assembly includes:
 a slot member attached to a corresponding shaft of the first blade, the second blade, the third blade, and the fourth blade, each slot member including a slot; and   a linkage including a pin for each slot.   
     
     
         8 . The damper system of  claim 1 , wherein the conduit body is connectable to a stack. 
     
     
         9 . The damper system of  claim 1 , further comprising a ring disposed in the conduit body, wherein the ring includes the first vertical wall and the second vertical wall. 
     
     
         10 . The damper system of  claim 1 , wherein a height of the first vertical wall is selected based on a rotational range of the first blade, and wherein the height is less than a width of the first blade. 
     
     
         11 . A damper system, comprising:
 a conduit body including an opening;   a ring disposed in the conduit body, the ring including a first vertical wall and a second vertical wall, wherein the first vertical wall and the second vertical wall at least partially span across the opening;   a first blade disposed within an interior of the ring;   a second blade disposed in the conduit body exterior of the ring; and   an actuator assembly configured to rotate the first blade prior to rotating the second blade.   
     
     
         12 . The damper system of  claim 11 , wherein the ring is a rectangular ring. 
     
     
         13 . The damper system of  claim 11 , further comprising:
 a third blade disposed within the ring; and   a fourth blade disposed in the conduit body exterior of the ring, wherein the actuator assembly is configured to rotate the first and third blades prior to rotating the second and fourth blades.   
     
     
         14 . The damper system of  claim 13 , wherein the actuator assembly includes:
 a slot member attached to a corresponding shaft of the first blade, the second blade, the third blade, and the fourth blade, each slot member including a slot; and   a linkage including a pin for each slot.   
     
     
         15 . The damper system of  claim 13 , wherein the ring includes a third vertical wall extending between the first blade and the third blade. 
     
     
         16 . The damper system of  claim 11 , wherein a height of the first and second vertical walls is greater than or equal to a height of the first blade when in an open position. 
     
     
         17 . The damper system of  claim 11 , wherein the conduit body is connectable to a duct. 
     
     
         18 . The damper system of  claim 11 , wherein the conduit body is connectable to a stack. 
     
     
         19 . A method of operating a damper, comprising:
 rotating a first blade disposed in a conduit and between a first and second vertical wall from a closed position where a first tip of the first blade faces a first point of the first vertical wall to a first position where the first tip is adjacent a second point of the first vertical wall, wherein a distance between the first tip and the second point is less than a distance between the first tip and the first point when the first blade is in the first position.   
     
     
         20 . The method of  claim 19 , further comprising:
 rotating the first blade from the first position to a second position such that the first tip is adjacent a third point of the first vertical wall, wherein a distance between the first tip and the third point is less than a distance between the first tip and the first point when the first blade is in the second position.