High velocity nozzle and windband assembly

Abstract

A nozzle stack and windband for an exhaust fan that has a nozzle stack with two side apertures for exhaust. Arranged around the periphery of a central aperture in the conical nozzle stack are two side apertures. The nozzle stack fits over the fan outlet. A nozzle stack may extend upwardly from a central aperture. Exhaust exiting the two side apertures induces a flow, especially when the windband encircles the nozzle.

1 . An exhaust nozzle stack comprising:
 a cone with outer walls and a central aperture; and   two side apertures formed along side walls of the conical side walls of the nozzle stack and running around the circumference of the cone.   
     
     
         2 . The nozzle stack of  claim 1 , wherein the two side apertures are arcuate. 
     
     
         3 . The nozzle stack of  claim 1 , wherein the central aperture runs an entire length of the cone and is open on its sides. 
     
     
         4 . The nozzle stack of  claim 3 , wherein exterior walls of the nozzle stack are tapered. 
     
     
         5 . The nozzle stack of  claim 3 , further comprising a windband extending upward and covering an exterior of the outer walls of the nozzle stack. 
     
     
         6 . The nozzle stack of  claim 5 , wherein the windband is conical and has a diameter greater at its bottom than a diameter at its top. 
     
     
         7 . The nozzle stack of claim of  claim 6 , wherein a diameter of the windband is smaller at its center than the diameter at its top. 
     
     
         8 . A windband and nozzle stack assembly comprising:
 a cone with outer walls and a central aperture;   two side apertures formed along side walls of the conical side walls of the nozzle stack and running around the circumference of the cone; and   a windband extending upward and covering an exterior of the outer walls of the nozzle stack.   
     
     
         9 . The nozzle stack of  claim 8 , wherein the two side apertures are arcuate. 
     
     
         10 . The nozzle stack of  claim 8 , wherein the central aperture runs an entire length of the cone and is open on its sides. 
     
     
         11 . The nozzle stack of  claim 8 , wherein exterior walls of the nozzle stack are tapered. 
     
     
         12 . The nozzle stack of  claim 8 , wherein the windband is conical and has a diameter greater at its bottom than a diameter at its top. 
     
     
         13 . The nozzle stack of claim of  claim 8 , wherein a diameter of the windband is smaller at its center than the diameter at its top.