Fan shroud

Abstract

A cooling system is provided for use in a machine. The cooling system includes a fan having a hub and a plurality of evenly spaced blades connected with the hub, and a shroud partially surrounding the fan. The shroud includes a flat surface having an opening of a predetermined diameter is centrally disposed on the flat surface. Further, the shroud includes a circular sidewall having of a predetermined width extending in a substantially perpendicular direction from the flat surface and encompasses the opening.

What is claimed is: 
     
         1 . A cooling system adapted for use in a machine comprising:
 a fan having a hub and a plurality of evenly spaced blades connected with the hub; and   a shroud partially surrounding the fan, the shroud includes:
 a flat surface; 
 an opening of a predetermined diameter is centrally disposed on the flat surface; and 
 a circular sidewall having of a predetermined width extending in a substantially perpendicular direction from the flat surface and encompasses the opening. 
   
     
     
         2 . The cooling system of  claim 1 , wherein the shroud has a rectangular shape. 
     
     
         3 . The cooling system of  claim 2 , wherein the shroud having a major dimension and a minor dimension, a ratio of the minor dimension to the major dimension is in a range of about 0.5 to 0.8. 
     
     
         4 . The cooling system of  claim 3 , wherein the ratio of the minor dimension to the major dimension is about 0.67. 
     
     
         5 . The cooling system of  claim 1 , wherein the flat surface and the circular sidewall are connected by a curved surface. 
     
     
         6 . The cooling system of  claim 1 , wherein the circular sidewall partially covers the fan blades. 
     
     
         7 . The cooling system of  claim 6 , wherein the plurality of fan blades having a predetermined width, a ratio of the circular sidewall width to the fan blade of predetermined width is in a range of about 0.5 to 0.8. 
     
     
         8 . The cooling system of  claim 7 , wherein the ratio of the circular sidewall of predetermined width to the fan blade of predetermined width is about 0.67. 
     
     
         9 . The cooling system of  claim 7 , wherein the fan extends by a predetermined distance beyond the shroud, a ratio of the predetermined distance to the fan blade of predetermined width is in a range of about 0.2 to 0.4. 
     
     
         10 . The cooling system of  claim 9 , wherein the ratio of the predetermined distance to the fan blade of predetermined width is about 0.33. 
     
     
         11 . The cooling system of  claim 1  further includes a heat exchanger releasably connected with the shroud. 
     
     
         12 . The cooling system of  claim 11 , the heat exchanger includes a core, wherein the flat surfaces are parallel with the core of the heat exchanger. 
     
     
         13 . The cooling system of  claim 1  further includes a protective shield releasably connected with the shroud and is positioned to substantially cover the fan. 
     
     
         14 . A shroud configured to partially surround a fan adapted in a cooling system comprising:
 a flat surface;   an opening of a predetermined diameter is centrally disposed on the flat surface; and   a circular sidewall having of a predetermined width extending in a substantially perpendicular direction from the flat surface and encompasses the opening.   
     
     
         15 . The shroud of  claim 14 , wherein the shroud has a rectangular shape. 
     
     
         16 . The shroud of  claim 15 , wherein the shroud having a major dimension and a minor dimension, a ratio of the minor dimension to the major dimension is in a range of about 0.5 to 0.8. 
     
     
         17 . The shroud of  claim 16 , wherein the ratio of the minor dimension to the major dimension is about 0.67. 
     
     
         18 . The shroud of  claim 14 , wherein the flat surface and the circular sidewall are connected by a curved surface. 
     
     
         19 . The shroud of  claim 14 , wherein the shroud is configured to be releasably connected with a heat exchanger. 
     
     
         20 . The cooling system of  claim 19 , the heat exchanger includes a core, wherein the flat surfaces are parallel with the core of the heat exchanger.