Cooling Device For A Rotating Polishing Disk

Abstract

A cooling device for a rotating machine has a fan assembly coupled with a backing plate. A hub, on the backing plate, secures the cooling device with a shaft. The backing plate includes one or more vents to enable air to exit the cooling device. The fan includes an opening to enable air to enter the cooling device. A chamber is formed between the fan assembly and the backing plate. During rotation, air is drawn into the opening. The air is passed into the chamber and exits through the vents to cool a work surface or working pad attached to the backing plate.

What is claimed is: 
     
         1 . A cooling device for a rotating machine comprising:
 a fan assembly coupled with a backing plate;   the backing plate including one or more vents to enable air to exit the cooling device;   the fan assembly including an opening to enable air to enter the cooling device, the fan assembly further comprising a housing plate having one or more naca ducts defining the opening for accelerating air that enters the cooling device;   a chamber formed between the fan assembly and the backing plate; and   during rotation, air is drawn through the one or more naca ducts into the chamber forcing the air into the chamber and raising the air pressure and the air exits out the one or more vents in the backing plate to cool a work surface or working pad attached to the backing plate.   
     
     
         2 . The cooling device according to  claim 1 , wherein a backing plate hub projects through an aperture in the fan assembly. 
     
     
         3 . The cooling device according to  claim 1 , further comprising a foam pad attached to the backing plate. 
     
     
         4 . The cooling device according to  claim 1 , wherein the fan assembly is of a one piece construction. 
     
     
         5 . The cooling device according to  claim 1  wherein the one or more naca ducts include an angled base with walls extending from the base and an opening at an end of the base. 
     
     
         6 . The cooling device according to  claim 1 , wherein the housing plate is coupled with the backing plate forming the chamber therebetween. 
     
     
         7 . A rotating polishing machine comprising:
 a housing;   a handle on the housing;   a motor positioned in the housing;   a rotating shaft extending from the motor; and   a cooling device comprising:   a fan assembly coupled with a backing plate;   the backing plate including one or more vents to enable air to exit the cooling device, a hub on the backing plate for securing the cooling device with the shaft;   the fan assembly including an opening to enable air to enter the cooling device the fan assembly including an opening to enable air to enter the cooling device, the fan assembly further comprising a housing plate having one or more naca ducts defining the opening for accelerating air that enters the cooling device;   a chamber formed between the fan assembly and the backing plate; and   during rotation, air is drawn through the one or more naca ducts into the chamber forcing the air into the chamber and raising the air pressure and the air exits out the one or more vents in the backing plate to cool a work surface or working pad attached to the backing plate.   
     
     
         8 . The rotating machine according to  claim 7 , wherein the hub projects through an aperture in the fan assembly. 
     
     
         9 . The rotating machine according to  claim 7 , further comprising a foam pad attached to the backing plate. 
     
     
         10 . The rotating machine according to  claim 7 , further comprising a foam pad attached to the backing plate. 
     
     
         11 . The rotating machine according to  claim 7 , wherein the housing is of a one piece construction. 
     
     
         12 . The cooling device according to  claim 7  wherein the one or more naca ducts include an angled base with walls extending from the base and an opening at an end of the base. 
     
     
         13 . The cooling device according to  claim 7 , wherein the housing plate is coupled with the backing plate forming the chamber therebetween.