Patents by Inventor Keh B. Dema

Keh B. Dema has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8512435
    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.
    Type: Grant
    Filed: August 22, 2012
    Date of Patent: August 20, 2013
    Assignee: Donaldson Company, Inc.
    Inventors: Robert M. Rogers, Keh B. Dema
  • Patent number: 8460424
    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.
    Type: Grant
    Filed: May 1, 2012
    Date of Patent: June 11, 2013
    Assignee: Donaldson Company, Inc.
    Inventors: Robert M. Rogers, Brad E. Kahlbaugh, Paul L. Kojetin, Keh B. Dema
  • Patent number: 8404014
    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.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: March 26, 2013
    Assignee: Donaldson Company, Inc.
    Inventors: Joseph Israel, Eugene Dunn, Keh B. Dema, Robert M. Rogers, Lorraine Keating-Klika, Leanne Kojetin
  • Publication number: 20130008846
    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.
    Type: Application
    Filed: September 14, 2012
    Publication date: January 10, 2013
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Robert M. Rogers, Keh B. Dema
  • Publication number: 20120312738
    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.
    Type: Application
    Filed: August 22, 2012
    Publication date: December 13, 2012
    Applicant: Donaldson Company, Inc.
    Inventors: Robert M. Rogers, Keh B. Dema
  • Patent number: 8277529
    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.
    Type: Grant
    Filed: August 31, 2011
    Date of Patent: October 2, 2012
    Assignee: Donaldson Company, Inc.
    Inventors: Robert M. Rogers, Keh B. Dema
  • Patent number: 8268033
    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.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: September 18, 2012
    Assignee: Donaldson Company, Inc.
    Inventors: Robert M. Rogers, Keh B. Dema
  • Publication number: 20110309012
    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.
    Type: Application
    Filed: August 31, 2011
    Publication date: December 22, 2011
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Robert M. Rogers, Keh B. Dema
  • Patent number: 8057567
    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.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: November 15, 2011
    Assignee: Donaldson Company, Inc.
    Inventors: David M. Webb, David E. Carlson, Robert M Rogers, Keh B. Dema
  • Patent number: 8021457
    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.
    Type: Grant
    Filed: November 5, 2004
    Date of Patent: September 20, 2011
    Assignee: Donaldson Company, Inc.
    Inventors: Keh B. Dema, Linda M. Olson
  • Publication number: 20110215046
    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.
    Type: Application
    Filed: May 18, 2011
    Publication date: September 8, 2011
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Robert M. Rogers, Keh B. Dema
  • Publication number: 20110198280
    Abstract: A filter and filter media configured and arranged for placement in a fuel stream is disclosed. The filter and filter media allow for filtering of liquid fuels, such as diesel fuel. In certain embodiments the filter media includes a media fiber (such as glass) and a binder fiber (such as bicomponent) that combine to create a media structure having low solidity and relatively low compressibility, and which contain a pore structure that avoids premature fouling of the filter by fuel degradation products.
    Type: Application
    Filed: February 14, 2011
    Publication date: August 18, 2011
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Derek O. Jones, Keh B. Dema, Stephen M. Larsen, Mike J. Madsen, Andrew J. Dallas, Yehya A. Elsayed, Chuanfang Yang
  • Patent number: 7985344
    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.
    Type: Grant
    Filed: November 20, 2007
    Date of Patent: July 26, 2011
    Assignee: Donaldson Company, Inc.
    Inventors: Keh B. Dema, Linda M. Olson
  • Publication number: 20110154790
    Abstract: An arrangement separating a hydrophobic liquid phase from gaseous stream, for crankcase ventilation arrangements as described. The arrangement includes a media stage comprising 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. Also described are techniques for assembly and use.
    Type: Application
    Filed: February 21, 2006
    Publication date: June 30, 2011
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Joseph Israel, Eugene Dunn, Keh B. Dema, Paul Kojertin, Robert M. Rogers, Lorriane Keating-Klika
  • Publication number: 20110115102
    Abstract: Techniques are described, for preparing media arrangements having resin provided from an aqueous based resin system therein. The media generally comprises fibers configured in a non-woven matrix. Preferred resin arrangements, and conditions for resin application, drying and cure are provided. Also described are media containing arrangements including media made according to the preferred descriptions.
    Type: Application
    Filed: June 2, 2005
    Publication date: May 19, 2011
    Applicant: DONALDSON COMPANY, INC.
    Inventor: Keh B. Dema
  • Publication number: 20110005394
    Abstract: An air filter having a low pressure drop and adsorbent capabilities when placed in a fluid stream is disclosed. The air filter contains activated carbon incorporated into a filter media that can be shaped into a fluted configuration. The fluted shape is maintained during operation of the air filter through the use of flow restrictors along the length of the flute. The fluted material can be rolled or stacked.
    Type: Application
    Filed: July 13, 2008
    Publication date: January 13, 2011
    Inventors: Jon D. Joriman, Andrew J. Dallas, Jeremy Exley, Brian Babcock, Keh B. Dema
  • Patent number: 7314497
    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.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: January 1, 2008
    Assignee: Donaldson Company, Inc.
    Inventors: Brad E. Kahlbaugh, Keh B. Dema, Linda M. Olson
  • Patent number: 7309372
    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.
    Type: Grant
    Filed: November 1, 2006
    Date of Patent: December 18, 2007
    Assignee: Donaldson Company, Inc.
    Inventors: Brad E. Kahlbaugh, Keh B. Dema, Linda M. Olson
  • Patent number: 5250094
    Abstract: A ceramic fiber filter media is provided which includes ceramic fiber material and an effective amount of fluid fiber material. Preferably the media also contains therein thermoconductive fiber component. Embodiments are illustrated wherein the ceramic fiber filter media is incorporated into a preferred filter element. Particulate trap systems corporating such filter elements therein are described.
    Type: Grant
    Filed: March 16, 1992
    Date of Patent: October 5, 1993
    Assignee: Donaldson Company, Inc.
    Inventors: H. Young Chung, Keh B. Dema, Marty A. Barris