Heat sinks and method of formation

Abstract

A heat sink (and method of forming a heat sink) is provided that includes a core having a central axis and a plurality of cooling fins arranged about the core. Each fin has a base and a tip. The fins may be shaped to capture a tangential component of air from the fan. At least one portion (such as upper portion) of the fins may be bent. A lower portion of each fin may also be bent.

1 .- 44 . (canceled)  
   
   
       45 . A heat sink comprising: 
 a core having a central axis; and    a plurality of cooling fins each having a base and a tip, the plurality of cooling fins each including a swept portion and a bent portion.    
   
   
       46 . The heat sink recited in  claim 45 , wherein the core has a central cavity configured to receive a thermal plug.  
   
   
       47 . The heat sink recited in  claim 45 , wherein the base of each fin may be coupled to the core substantially parallel to the central axis.  
   
   
       48 . The heat sink recited in  claim 45 , wherein the swept portion of each fin is swept in the same relative direction.  
   
   
       49 . The heat sink recited in  claim 45 , wherein the bent portion of each fin is bent in the same relative direction.  
   
   
       50 . The heat sink recited in  claim 45 , wherein the plurality of cooling fins are each shaped to capture a tangential component of air from an axial flow fan.  
   
   
       51 . The heat sink recited in  claim 45 , wherein the plurality of cooling fins are each shaped to direct a relatively large and relatively high velocity airflow to a surface of each fin.  
   
   
       52 . A heat sink comprising: 
 a core having a central axis; and    a plurality of cooling fins each having a base and a tip, the plurality of cooling fins each including first and second bent portions.    
   
   
       53 . The heat sink recited in  claim 52 , wherein the core has a central cavity configured to receive a thermal plug.  
   
   
       54 . The heat sink recited in  claim 52 , wherein the base of each fin may be coupled to the core substantially parallel to the central axis.  
   
   
       55 . The heat sink recited in  claim 52 , wherein the bent portions are located on opposite ends of a curved portion.  
   
   
       56 . The heat sink recited in  claim 52 , wherein the plurality of cooling fins are each curved in a direction opposite to the direction of rotation of air from an axial flow fan.  
   
   
       57 . The heat sink recited in  claim 52 , wherein the first bent portions are bent in the same relative direction.  
   
   
       58 . The heat sink recited in  claim 52 , wherein the second bent portions are bent in the same relative direction.  
   
   
       59 . The heat sink recited in  claim 52 , wherein the plurality of fins are each shaped to capture a tangential component of air from an axial flow fan.  
   
   
       60 . The heat sink recited in  claim 52 , wherein the plurality of fins are each shaped to direct a relatively large and relatively high velocity airflow to a surface of each fin.