Patent ID: 7450337

Claim:
A method for guiding bypass reentry flow through contraction and filter in a hard disk drive comprising: providing a bypass channel for directing airflow away from a first portion of a disk of the hard disk drive and toward a second portion of the disk of the hard disk drive, said bypass channel branching said airflow into a first portion and a second portion; providing a contraction portion coupled with the bypass channel at a location wherein the bypass channel directs the airflow back toward the second portion of the disk of the hard disk drive, said contraction portion accelerating said first portion of the airflow directed toward the second portion of the disk of the hard disk drive, wherein the first portion of the airflow passing through the contraction portion does not pass through a filter; and providing a filter portion integral with the contraction portion, said filter portion filtering said second portion of the airflow directed toward the second portion of the disk of the hard disk drive.