The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 1994
Filed:
Dec. 16, 1993
Charles A Brown, Los Gatos, CA (US);
Herman R Wendt, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A data recording disk drive has an improved breather filter assembly that removes both chemical contaminants and particulate matter. The filter assembly includes a housing having an internal passage and a recess that supports and contains the chemical and particulate filter elements, The passage in the filter housing provides fluid communication between the breather opening and a sheet of chemical filter material. A barrier plate is also located in the filter housing recess adjacent to the side of the chemical filter sheet not exposed to air from the passage. The barrier plate prevents air from flowing through the chemical filter material and redirects the air flow across the surface of the chemical filter sheet. After the air flows by the chemical filter sheet, it is redirected through the particulate filter element and into the disk drive enclosure. The air entering the disk drive enclosure does not generally enter into the interior of the chemical filter material by forced conduction, but flows by the surface of the material so that the chemical filter does not significantly increase the flow impedance of the filter assembly, as in prior art breather filter assemblies. The flow across the surface of the material allows contaminants to diffuse into the getter material and become trapped.