Vijay Kumar Garikipati

US Patent:

6491741, Dec 10, 2002

Filed:

Dec 11, 2000

Appl. No.:

09/734424

Inventors:

Daniel L. Tuma - St. Paul MN
Andrew C. Dahlgren - Lantau Island, HK
Vijay Garikipati - Plymouth MN
Randy J. Logan - St. Paul MN

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D 5304

US Classification:

95 90, 95143, 96135, 96153, 553851, 55512

Abstract:

A filter assembly includes a shaped adsorbent article disposed in a housing. The shaped adsorbent article has one or more projections extending from a surface of the article toward the housing to provide for flow of fluid between the shaped adsorbent article and the housing. The filter assembly may optionally include a diffusion channel for additional filtering and/or one or more porous polymer films disposed over inlet or outlet openings in the housing to reduce or prevent particulate contamination. The filter assembly may be used in a device, such as a computer disk drive, to filter a fluid, such as air, within and/or entering or exiting the device.

US Patent:

6726745, Apr 27, 2004

Filed:

Jul 31, 2002

Appl. No.:

10/210232

Inventors:

Daniel L. Tuma - St. Paul MN
Andrew C. Dahlgren - Lantau Island, HK
Vijay Garikipati - Plymouth MN
Randy J. Logan - St. Paul MN

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D 5304

US Classification:

95 90, 95143, 96135, 96153, 553851, 55512

Abstract:

A filter assembly includes a shaped adsorbent article disposed in a housing. The shaped adsorbent article has one or more projections extending from a surface of the article toward the housing to provide for flow of fluid between the shaped adsorbent article and the housing. The filter assembly may optionally include a diffusion channel for additional filtering and/or one or more porous polymer films disposed over inlet or outlet openings in the housing to reduce or prevent particulate contamination. The filter assembly may be used in a device, such as a computer disk drive, to filter a fluid, such as air, within and/or entering or exiting the device.

US Patent:

6926761, Aug 9, 2005

Filed:

May 21, 2003

Appl. No.:

10/442399

Inventors:

Christopher M. Johnson - Golden Valley MN, US
Patrick L. McPhail - Minneapolis MN, US
Vijay K. Garikipati - Eagan MN, US
Andre D. Leier - Shakopee MN, US

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D046/10
B01D053/04

US Classification:

96135, 96139, 96147, 96153, 553856, 360 9702

Abstract:

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.

US Patent:

6936093, Aug 30, 2005

Filed:

Feb 27, 2003

Appl. No.:

10/375950

Inventors:

Katsushi Isogawa - Eagan MN, US
Carl J. Soldner - Apple Valley MN, US
Kristin Fischer - Burnsville MN, US
Vijay K. Garikipati - Eagan MN, US
James P. Hand - Lakeville MN, US

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B03C003/155
B01D046/12
B01D053/04

US Classification:

96 55, 96 58, 96121, 96132, 96135, 96147, 96153, 96154, 553856

Abstract:

A multilayer filter assembly for use inside an electronic enclosure, such as a hard disk drive enclosure containing a rotating disk, is disclosed. The filter assembly provides filtration of air entering the enclosure, as well as air circulating within the enclosure. The filter assembly is generally a single-piece unit that can be formed without a rigid frame, thus allowing the filter assembly to be produced at a reduced cost. In one implementation of the invention, the multilayer filter assembly contains at least two particulate removal layers covering, enclosing, and dividing at least two adsorbent regions. One of the adsorbent regions is configured to be placed flush against an interior wall of the electronic enclosure to allow air to flow in and out of the enclosure, while the other adsorbent region is configured to be placed in an upright position in the enclosure with exposed surfaces that allow airflow through this portion of the filter assembly.

US Patent:

7125433, Oct 24, 2006

Filed:

Dec 31, 2003

Appl. No.:

10/749793

Inventors:

Vijay Kumar Garikipati - Eagan MN, US
Patrick L. McPhail - Minneapolis MN, US
Shu Lam Sin - Hong Kong, HK
Katsushi Isogawa - Eagan MN, US

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

B01D 53/02
G11B 33/14

US Classification:

553856, 96139, 360 9702

Abstract:

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.

US Patent:

7404836, Jul 29, 2008

Filed:

May 11, 2004

Appl. No.:

10/843215

Inventors:

Vijay K. Garikipati - Eagan MN, US
Katsushi Isogawa - Eagan MN, US
Stanley B. Miller - Eden Prairie MN, US
Carl Soldner - Apple Valley MN, US

Assignee:

Donaldson Company, Inc. - Minneapolis MN

International Classification:

G11B 17/02
B01D 53/04

US Classification:

553856, 96134, 96140, 96142, 360 9702, 360 9703

Abstract:

A filter assembly for use in a disk drive assembly is disclosed. The filter assembly is configured to remove contaminants within the drive assembly and to prevent entry of contaminants into the drive assembly. In one implementation the filter assembly includes a housing configured for placement in a disk drive assembly containing a rotating disk, the housing including an air scoop having an entrance configured for placement beneath the rotating disk in the drive assembly; and a major surface having a wall and an opening in the wall, the opening configured for receiving a filter material and being in fluid communication with the entrance to the air scoop. A filter element is positioned within the housing and configured so that a first portion of the element filters air directed from the air scoop, while a second portion of the element filters air from the exterior of the drive assembly, the first and second portions sealed by a common filter material placed over the opening in the major surface.

US Patent:

20020075590, Jun 20, 2002

Filed:

Dec 14, 2000

Appl. No.:

09/737264

Inventors:

Vijay Garikipati - Eagan MN, US
Randy Logan - Farmington MN, US
Daniel Tuma - St. Paul MN, US

International Classification:

G11B017/02

US Classification:

360/097020

Abstract:

A filter construction for use in a disk drive enclosure. The filter construction includes a first filter portion that removes or reduces contaminants entering the disk drive enclosure; the filter construction further includes a second filter portion that removes or reduces contaminants present within the disk drive enclosure. In one embodiment, the first filter portion has an adsorbent filter, such as a breather filter, positioned over the disk drive port that extends from the enclosure to the exterior of the enclosure. A diffusion channel can be combined with the adsorbent filter. The second filter portion includes an adsorbent filter, such as a recirculation filter, which allows air or gas to flow through with little resistance.

US Patent:

20070056444, Mar 15, 2007

Filed:

Jul 12, 2006

Appl. No.:

11/457085

Inventors:

Vijay Garikipati - Eagan MN, US

International Classification:

B01D 53/02

US Classification:

096135000

Abstract:

A filter for removing contaminants from an electronic enclosure. The filter includes fluted filter media for increasing the filter surface area. The filter may be configured in a flow by configuration or a flow through configuration. The filter may further include a scrim. A disk drive assembly includes an enclosure, a disk rotatably mounted within the enclosure, and a filter, where the filter is constructed from fluted filter media.