Donaldson Comapny, Inc.

Patrick L McPhail

Vijay Kumar Garikipati

Katsushi Isogawa

Andre D Leier

Christopher M Johnson

Shu Lam Sin

A multiple diffusion channel filter assembly is disclosed. The filter assembly provides filtration of air entering and exiting an electronic enclosure through a breather hole. In one implementation, the filter assembly contains a housing with an adsorbent component and a first diffusion channel and a second diffusion channel. In another implementation, the filter assembly contains a first layer and a second layer which surround an adsorbent component and a first and a second diffusion channel that are in fluid communication with the interior space defined by the first and second layers. In yet another implementation, the invention, includes a filter accessory containing a diffusion channel configured to work in conjunction with a separate filter assembly thereby adding an additional diffusion channel to the existing design.

Dual diffusion channel filter

A breather bag filter assembly for use with an electronic enclosure, such as a hard disk drive enclosure containing a rotating disk, is disclosed. The filter assembly provides filtration of air entering and exiting an electronic enclosure through a breather hole. The filter assembly is a deformable sealed cavity that exchanges air with the drive enclosure as the air pressure inside the drive enclosure fluctuates. In one implementation of the invention the filter assembly contains three layers of material. Two layers of material form the exterior of the filter assembly surrounding a third layer that is composed of an adsorbent material.

Electronic breather bag filter

The present invention is directed to a carrier for retaining and transferring filtration devices, as well as to filtration devices configured for placement in the carrier. The carrier generally includes a tray having a plurality of filter seats along with a plurality of holes extending through the tray. Each filter has a release liner that is removably secured to a pressure sensitive adhesive on the filter, and this release liner also contains a tab that extends through one of the holes in the tray and is permanently bonded to the bottom side of the tray. In use the filters can be removed from the tray by manual or automatic means. During the removal process the release liner separates from the pressure sensitive adhesive on the filter and is retained on the tray. In certain implementations the release liner contains two portions with an adhesive on them&#x2014;one portion in contact with the filter and one portion in contact with the tray&#x2014;and these two portions are separated by an area of the release liner that does not contain adhesive.

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Minneapolis, MN, United States of America

Patrick L McPhail