Airflow dispersion system

Abstract

A hard disk drive includes a base, a disk to record and store data, a head stack assembly provided in the base to read out data from the disk which rotates about a pivot shaft, and an air force dispersion unit positioned adjacent to the head stack assembly to disperse an air force generated during a rotation of the disk.

1 .- 22 . (canceled) 
     
     
         23 . An apparatus comprising:
 a disk disposed in a base;   a head stack assembly disposed in the base; and   an air dam disposed outside of the disk,
 wherein the air dam is not concentric with the disk. 
   
     
     
         24 . The apparatus of  claim 23 , wherein the head stack assembly, operable to rotate around a pivot shaft, comprises
 an actuator having an end portion supporting a magnetic head, and   a voice coil motor disposed at an opposite position of the pivot shaft with respect to the actuator and operable to drive the actuator.   
     
     
         25 . The apparatus of  claim 23 , wherein the air dam is operable to block an air flow from a rear of the head stack assembly toward the disk. 
     
     
         26 . The apparatus of  claim 25 , wherein the air dam is convex with respect to the disk. 
     
     
         27 . The apparatus of  claim 25 , wherein the air dam is substantially straight. 
     
     
         28 . The apparatus of  claim 25 , wherein the air dam extends from a bottom surface of the base toward a top surface of the base. 
     
     
         29 . The apparatus of  claim 28 , wherein the air dam has a height equal to or less than a height of a sidewall of the base. 
     
     
         30 . An apparatus comprising:
 a disk disposed in a base;   a head stack assembly disposed in the base; and   an air dam disposed outside of the disk,
 wherein the air dam is solely provided without an air force dispersion unit disposed adjacent to the head stack assembly. 
   
     
     
         31 . The apparatus of  claim 30 , wherein the head stack assembly, operable to rotate around a pivot shaft, comprises
 an actuator having an end portion supporting a magnetic head, and   a voice coil motor disposed at an opposite position of the pivot shaft with respect to the actuator and operable to drive the actuator.   
     
     
         32 . The apparatus of  claim 30 , wherein the air dam is operable to block an air flow from a rear of the head stack assembly toward the disk. 
     
     
         33 . The apparatus of  claim 32 , wherein the air dam extends along a curve corresponding with a radius of the disk. 
     
     
         34 . The apparatus of  claim 32 , wherein the air dam is convex with respect to the disk. 
     
     
         35 . The apparatus of  claim 32 , wherein the air dam has a linear block shape. 
     
     
         36 . An apparatus comprising:
 a disk disposed in a base;   a head stack assembly disposed in the base; and   a means for blocking an air flow from a rear of the head stack assembly toward the disk.   
     
     
         37 . The apparatus of  claim 36 , wherein the head stack assembly, operable to rotate around a pivot shaft, comprises
 an actuator having an end portion supporting a magnetic head, and   a voice coil motor disposed at an opposite position of the pivot shaft with respect to the actuator and operable to drive the actuator.   
     
     
         38 . The apparatus of  claim 36 , wherein the means for blocking the air flow extends along a curve corresponding with a radius of the disk. 
     
     
         39 . The apparatus of  claim 36 , wherein the means for blocking the air flow is convex with respect to the disk. 
     
     
         40 . The apparatus of  claim 36 , wherein the means for blocking the air flow has a linear block shape. 
     
     
         41 . The apparatus of  claim 25 , wherein the means for blocking the air flow extends from a bottom surface of the base toward a top surface of the base. 
     
     
         42 . The apparatus of  claim 28 , wherein the means for blocking the air flow has a height equal to or less than a height of a sidewall of the base.