Keh Buma Dema from Milton, FL, age 72

Filter Medium And Structure
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US Patent:

7309372, Dec 18, 2007
Filed:

Nov 1, 2006
Appl. No.:

11/591330
Inventors:

Brad E. Kahlbaugh - Bloomington MN, US
Keh B. Dema - Maple Grove MN, US
Linda M. Olson - Savage MN, US
Assignee:

Donaldson Company, Inc. - DE
International Classification:

B01D 46/00
US Classification:

55527, 55528, 210508
Abstract:

Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units. Such filter units can be placed in the stream of a mobile fluid and can remove a particulate load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications.

Filter Medium And Structure
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US Patent:

7314497, Jan 1, 2008
Filed:

Nov 4, 2005
Appl. No.:

11/267958
Inventors:

Brad E. Kahlbaugh - Bloomington MN, US
Keh B. Dema - Maple Grove MN, US
Linda M. Olson - Savage MN, US
Assignee:

Donaldson Company, Inc. - DE
International Classification:

B01D 46/00
US Classification:

55527, 55528, 210508
Abstract:

Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units. Such filter units can be placed in the stream of a mobile fluid and can remove a particulate load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications.

High Strength, High Capacity Filter Media And Structure
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US Patent:

7985344, Jul 26, 2011
Filed:

Nov 20, 2007
Appl. No.:

11/986377
Inventors:

Keh B. Dema - Maple Grove MN, US
Linda M. Olson - Savage MN, US
Assignee:

Donaldson Company, Inc. - Minneapolis MN
International Classification:

B01D 37/00
US Classification:

210767, 210504, 210505, 210508, 210509
Abstract:

In the filtration of fluid materials, the removal of particulate from the moving stream requires substantial pressure to maintain flow and substantial capacity for removing particulate. The filters of the invention are rugged, high wet strength materials having a basis weight, permeability and efficiency suitable to obtain substantial reduction in particulate loading from liquid streams without plugging or mechanical failure. In particular, the filters of the invention permit the removal of substantial proportions of particulate from non-aqueous streams including lubricant oils, hydraulic fluids and other contaminated streams.

Filter Media And Structure
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US Patent:

8021457, Sep 20, 2011
Filed:

Nov 5, 2004
Appl. No.:

10/982538
Inventors:

Keh B. Dema - Maple Grove MN, US
Linda M. Olson - Savage MN, US
Assignee:

Donaldson Company, Inc. - Minneapolis MN
International Classification:

B01D 39/14
US Classification:

55527, 55487, 55524, 55528, 210504, 210505, 210508
Abstract:

In the filtration of fluid materials, the removal of particulate from the moving stream requires substantial pressure to maintain flow and substantial capacity for removing particulate. The filters of the invention are rugged, high wet strength materials having a basis weight, permeability and efficiency suitable to obtain substantial reduction in particulate loading from liquid streams without plugging or mechanical failure. In particular, the filters of the invention permit the removal of substantial proportions of particulate from non-aqueous streams including lubricant oils, hydraulic fluids and other contaminated streams.

Aerosol Separator; And Method
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US Patent:

8177875, May 15, 2012
Filed:

Jan 31, 2006
Appl. No.:

11/883690
Inventors:

Robert Rogers - Minnetonka MN, US
Brad Kahlbaugh - Roseville MN, US
Paul Kojetin - Rosemount MN, US
Keh Dema - Plymouth MN, US
Assignee:

Donaldson Company, Inc. - Minneapolis MN
International Classification:

B01D 46/00
US Classification:

55486, 55498, 55524, 55527, 55528, 55DIG 19
Abstract:

Crankcase ventilation arrangements are shown. Preferred wet laid media materials, for use in such arrangements are described. Also described and shown are example crankcase ventilation components, parts for use with a preferred media described and characterized.

Filter Medium And Structure
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US Patent:

8268033, Sep 18, 2012
Filed:

May 18, 2011
Appl. No.:

13/110148
Inventors:

Robert M. Rogers - Minnetonka MN, US
Keh B. Dema - Plymouth MN, US
Assignee:

Donaldson Company, Inc. - Minneapolis MN
International Classification:

B01D 46/00
B01D 39/16
B01D 39/20
US Classification:

55527, 55528, 210505, 210508, 210509
Abstract:

Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units, such as breather caps. Such filter units can be placed in the stream of a mobile fluid and can remove a particulate and/or fluid mist load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications.

Filter Medium And Breather Filter Structure
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US Patent:

8277529, Oct 2, 2012
Filed:

Aug 31, 2011
Appl. No.:

13/222063
Inventors:

Robert M. Rogers - Minnetonka MN, US
Keh B. Dema - Plymouth MN, US
Assignee:

Donaldson Company, Inc. - Minneapolis MN
International Classification:

B01D 46/00
B01D 39/16
B01D 39/20
US Classification:

55486, 55487, 55527, 55528
Abstract:

Thermoplastic bicomponent binder fiber can be combined with other media, fibers and other filtration components to form a thermally bonded filtration media. The filtration media can be used in filter units, such as breather caps. Such filter units can be placed in the stream of a mobile fluid and can remove a particulate and/or fluid mist load from the mobile stream. The unique combination of media fiber, bicomponent binder fiber and other filtration additives and components provide a filtration media having unique properties in filtration applications.

Aerosol Separator
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US Patent:

8404014, Mar 26, 2013
Filed:

Feb 21, 2006
Appl. No.:

11/884743
Inventors:

Joseph Israel - St. Louis Park MN, US
Eugene Dunn - Coon Rapids MN, US
Keh B. Dema - Maple Grove MN, US
Robert M. Rogers - Minnetonka MN, US
Leanne Kojetin - Rosemount MN, US
Assignee:

Donaldson Company, Inc. - Minneapolis MN
International Classification:

B01D 46/00
US Classification:

553853, 55423, 55498, 55524, 55527, 55528, 55DIG 19
Abstract:

An arrangement separating a hydrophobic liquid phase from gaseous stream, for crankcase ventilation arrangements as described. The arrangement includes a media stage including media formed from a vacuum forming process and including at least 50%, by weight, bi-component fiber therein. Useable media formulations and arrangements are described.

Keh Buma Dema