Patents by Inventor Andrew C. Dahlgren
Andrew C. Dahlgren 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).
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Publication number: 20240375032Abstract: A gas turbine air intake system uses a filter element having a seal member with radial projections and radial recesses. The seal member forms a seal with components on the tube sheet of the system and at the end opposite of the tube sheet. At the end opposite of the tube sheet, there can be an assembly cover, or alternatively, an additional filter cartridge.Type: ApplicationFiled: July 15, 2024Publication date: November 14, 2024Applicant: Donaldson Company, Inc.Inventors: Jason A. TIFFANY, Brent L. ANDERSON, Richard P. DEJONG, Andrew C. DAHLGREN, Wim VAN GELDER, Olivier RONNEAU, Mathijs VERSTRAETE, Gert PROOST, Massimo MOVIA, Eli Payton ROSS, Michael R. CARLSON
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Patent number: 12036502Abstract: A gas turbine air intake system uses a filter element having a seal member with radial projections and radial recesses. The seal member forms a seal with components on the tube sheet of the system and at the end opposite of the tube sheet. At the end opposite of the tube sheet, there can be an assembly cover, or alternatively, an additional filter cartridge.Type: GrantFiled: June 29, 2023Date of Patent: July 16, 2024Assignee: Donaldson Company, Inc.Inventors: Jason A. Tiffany, Brent L. Anderson, Richard P. DeJong, Andrew C. Dahlgren, Wim Van Gelder, Olivier Ronneau, Mathijs Verstraete, Gert Proost, Massimo Movia, Eli Payton Ross, Michael R. Carlson
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Publication number: 20230390685Abstract: A gas turbine air intake system uses a filter element having a seal member with radial projections and radial recesses. The seal member forms a seal with components on the tube sheet of the system and at the end opposite of the tube sheet. At the end opposite of the tube sheet, there can be an assembly cover, or alternatively, an additional filter cartridge.Type: ApplicationFiled: June 29, 2023Publication date: December 7, 2023Applicant: Donaldson Company, Inc.Inventors: Jason A. TIFFANY, Brent L. ANDERSON, Richard P. DEJONG, Andrew C. DAHLGREN, Wim VAN GELDER, Olivier RONNEAU, Mathijs VERSTRAETE, Gert PROOST, Massimo MOVIA, Eli Payton ROSS, Michael R. CARLSON
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Patent number: 11691101Abstract: A gas turbine air intake system uses a filter element having a seal member with radial projections and radial recesses. The seal member forms a seal with components on the tube sheet of the system and at the end opposite of the tube sheet. At the end opposite of the tube sheet, there can be an assembly cover, or alternatively, an additional filter cartridge.Type: GrantFiled: January 23, 2019Date of Patent: July 4, 2023Assignee: Donaldson Company, Inc.Inventors: Jason A. Tiffany, Brent L. Anderson, Richard P. DeJong, Andrew C. Dahlgren, Wim Van Gelder, Olivier Ronneau, Mathijs Verstraete, Gert Proost, Massimo Movia, Eli Payton Ross, Michael R. Carlson
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Publication number: 20210046415Abstract: A gas turbine air intake system uses a filter element having a seal member with radial projections and radial recesses. The seal member forms a seal with components on the tube sheet of the system and at the end opposite of the tube sheet. At the end opposite of the tube sheet, there can be an assembly cover, or alternatively, an additional filter cartridge.Type: ApplicationFiled: January 23, 2019Publication date: February 18, 2021Applicant: Donaldson Company, Inc.Inventors: Jason A. TIFFANY, Brent L. ANDERSON, Richard P. DEJONG, Andrew C. DAHLGREN, Wim VAN GELDER, Olivier RONNEAU, Mathijs VERSTRAETE, Gert PROOST, Massimo MOVIA, Eli Payton ROSS, Michael R. CARLSON
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Patent number: 6726745Abstract: 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.Type: GrantFiled: July 31, 2002Date of Patent: April 27, 2004Assignee: Donaldson Company, Inc.Inventors: Daniel L. Tuma, Andrew C. Dahlgren, Vijay Garikipati, Randy J. Logan
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Publication number: 20020194989Abstract: 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 includes 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.Type: ApplicationFiled: July 31, 2002Publication date: December 26, 2002Applicant: Donaldson Company, Inc.Inventors: Daniel L. Tuma, Andrew C. Dahlgren, Vijay Garikipati, Randy J. Logan
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Patent number: 6491741Abstract: 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.Type: GrantFiled: December 11, 2000Date of Patent: December 10, 2002Assignee: Donaldson Company, Inc.Inventors: Daniel L. Tuma, Andrew C. Dahlgren, Vijay Garikipati, Randy J. Logan
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Publication number: 20010000381Abstract: 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 includes 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.Type: ApplicationFiled: December 11, 2000Publication date: April 26, 2001Applicant: Donaldson Company, Inc.Inventors: Daniel L. Tuma, Andrew C. Dahlgren, Vijay Garikipati, Randy J. Logan
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Patent number: 6168651Abstract: 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 diffiusion 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.Type: GrantFiled: July 14, 1999Date of Patent: January 2, 2001Assignee: Donaldson Company, Inc.Inventors: Daniel L. Tuma, Andrew C. Dahlgren, Vijay Garikipati, Randy J. Logan
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Patent number: 6146446Abstract: 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.Type: GrantFiled: October 8, 1998Date of Patent: November 14, 2000Assignee: Donaldson Company, Inc.Inventors: Daniel L. Tuma, Andrew C. Dahlgren, Vijay Garikipati
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Patent number: 5997614Abstract: A filter has a channel layer film defining a channel, a boundary layer mounted to at least a portion of the channel layer film and forming a non-adhesive boundary for the channel, and filter media disposed in fluid communication with the channel. The boundary layer typically includes a non-porous or semipermeable film. The filter is configured and arranged to provide for flow of at least a portion of a fluid along the channel and into the filter media. This filter can be used in a device as a filter over a vent in a housing of the device.Type: GrantFiled: July 13, 1998Date of Patent: December 7, 1999Assignee: Donaldson Company, Inc.Inventors: Daniel L. Tuma, Randy J. Logan, Andrew C. Dahlgren