Patents by Inventor David B. Harder
David B. Harder 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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Patent number: 8419938Abstract: An endcap including a first plate member including a radial inner portion, a radial outer portion, and defining a longitudinal axis. The endcap also includes a flange disposed between the radial inner and outer portions of the first plate member and projecting axially along the longitudinal axis in a first direction. The endcap also includes a first seal member disposed adjacent the flange. The first seal includes a first portion thereof engaged with an axial facing surface of the first plate member and a second portion thereof engaged with a radially facing surface of the flange. The endcap further includes a second plate member disposed radially outward of the radial outer portion and a second seal member disposed adjacent the second plate member including at least a portion thereof axially spaced from the axially facing surface of the first plate member in a second direction along the longitudinal axis opposite the first direction.Type: GrantFiled: October 1, 2010Date of Patent: April 16, 2013Assignees: Catepillar Inc., Advanced Filtration Systems Inc., Donaldson Company Inc.Inventors: Jeffrey R. Ries, Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger
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Publication number: 20130033006Abstract: An endcap includes a first plate member having a radial inner portion, a radial outer portion, and defining a longitudinal axis. The endcap also includes a flange disposed between the radial inner and outer portions, and projecting axially along the longitudinal axis in a first direction. The endcap also includes a first seal member disposed adjacent the flange. The first seal member includes a first portion engaged with an axial facing surface of the first plate member and a second portion engaged with a radially facing surface of the flange. The endcap further includes a second plate member disposed radially outward of the radial outer portion and a second seal member disposed adjacent the second plate member including at least a portion axially spaced from the axially facing surface of the first plate member in a second direction along the longitudinal axis opposite the first direction.Type: ApplicationFiled: August 7, 2012Publication date: February 7, 2013Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard Eisenmenger
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Patent number: 8272516Abstract: An endcap including a first plate member including a radial inner portion, a radial outer portion, and defining a longitudinal axis. The endcap also includes a flange disposed between the radial inner and outer portions of the first plate member and projecting axially along the longitudinal axis in a first direction. The endcap also includes a first seal member disposed adjacent the flange. The first seal includes a first portion thereof engaged with an axial facing surface of the first plate member and a second portion thereof engaged with a radially facing surface of the flange. The endcap further includes a second plate member disposed radially outward of the radial outer portion and a second seal member disposed adjacent the second plate member including at least a portion thereof axially spaced from the axially facing surface of the first plate member in a second direction along the longitudinal axis opposite the first direction.Type: GrantFiled: November 19, 2007Date of Patent: September 25, 2012Assignees: Caterpillar Inc., Advanced Filtration Systems Inc., Donaldon Company Inc.Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard Eisenmenger
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Publication number: 20110132828Abstract: An endcap including a first plate member including a radial inner portion, a radial outer portion, and defining a longitudinal axis. The endcap also includes a flange disposed between the radial inner and outer portions of the first plate member and projecting axially along the longitudinal axis in a first direction. The endcap also includes a first seal member disposed adjacent the flange. The first seal includes a first portion thereof engaged with an axial facing surface of the first plate member and a second portion thereof engaged with a radially facing surface of the flange. The endcap further includes a second plate member disposed radially outward of the radial outer portion and a second seal member disposed adjacent the second plate member including at least a portion thereof axially spaced from the axially facing surface of the first plate member in a second direction along the longitudinal axis opposite the first direction.Type: ApplicationFiled: October 1, 2010Publication date: June 9, 2011Applicants: Caterpillar, Inc., Advanced Filtration Systems, Inc., Donaldson Company, Inc.Inventors: Jeffrey R. RIES, Christopher J. SALVADOR, Randall W. HEIBENTHAL, Dennis M. DEEDRICH, David B. HARDER, John R. HACKER, Richard J. EISENMENGER
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Publication number: 20110073537Abstract: A filter element disclosed herein includes a center tube defining a central reservoir and including an interior sidewall. The filter element further includes an end plate and a pocket defining a port extending from the end plate into the central reservoir. The pocket includes an inner wall, an outer wall, and a plurality of projections extending from the outer wall of the pocket toward the interior sidewall of the center tube.Type: ApplicationFiled: October 1, 2010Publication date: March 31, 2011Applicants: CATERPILLAR, INC., ADVANCED FILTRATION SYSTEMS, INC., DONALDSON COMPANY, INC.Inventors: Mark T. Allott, David Ofori-Amoah, Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger
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Patent number: 7556155Abstract: A fluid filter arrangement has a housing, a filter cartridge oriented within the housing, and a projection arrangement. The projection arrangement is oriented to space the filter cartridge from a wall of the housing in order to provide a fluid flow path between the filter cartridge and the housing wall. In some arrangements, the projection arrangement is part of an end cap. Embodiments of the projections include axial extensions, radial extensions, and angled extensions including both radial and axial components. Systems of use, methods of filtering, methods of making, and methods of servicing include arrangements of these types.Type: GrantFiled: October 7, 2003Date of Patent: July 7, 2009Assignee: Donaldson Company, Inc.Inventors: David B. Harder, Philip Edward Johnson, Eivind Stenersen, Curt A. Rausch, John R. Hacker
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Publication number: 20090127198Abstract: An endcap including a first plate member including a radial inner portion, a radial outer portion, and defining a longitudinal axis. The endcap also includes a flange disposed between the radial inner and outer portions of the first plate member and projecting axially along the longitudinal axis in a first direction. The endcap also includes a first seal member disposed adjacent the flange. The first seal includes a first portion thereof engaged with an axial facing surface of the first plate member and a second portion thereof engaged with a radially facing surface of the flange. The endcap further includes a second plate member disposed radially outward of the radial outer portion and a second seal member disposed adjacent the second plate member including at least a portion thereof axially spaced from the axially facing surface of the first plate member in a second direction along the longitudinal axis opposite the first direction.Type: ApplicationFiled: November 19, 2007Publication date: May 21, 2009Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard Eisenmenger
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Publication number: 20090008320Abstract: A fluid filter arrangement includes a housing defining a slot arrangement. A filter cartridge is oriented within the housing. A projection arrangement engages the slot arrangement in the housing and spaces the filter cartridge from a wall of the housing to define a fluid flow path between the cartridge and the housing wall. A filter cartridge includes a tubular construction of filter media and a projection arrangement. A filter assembly includes the filter arrangement connected to a filter head. Preferably, the filter cartridge and filter head are made of plastic. Methods of assembling a filter includes inserting a filter cartridge and projection arrangement into an open end of a housing, engaging projections against through-slots defined by the housing to secure the filter cartridge in the housing. In some arrangements, a filter housing includes a plastic wall having an interior side with a support structure in the form of ribs extending from the interior side of the housing.Type: ApplicationFiled: January 16, 2006Publication date: January 8, 2009Applicant: DONALDSON COMPANY INC.Inventors: David B. Harder, Gus E. Breiland, John Francis Connelly
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Publication number: 20040079693Abstract: A liquid filter assembly includes a filter head having an interchangeable spin-on canister filter and a bowl-cartridge filter. Methods of using the liquid filter assembly include providing a filter head capable of operably receiving both a spin-on canister filter and a bowl-cartridge filter. The method also includes operably installing one of the spin-on canister filter and the bowl-cartridge filter onto the filter head to provide a filter assembly. After a period of use, the spin-on canister filter or bowl-cartridge filter is removed and replaced. The replacement can include, interchangeably, a spin-on canister filter and a bowl-cartridge filter. Constructions for accommodating an interchangeable system include preferred arrangements of mechanical connection structure.Type: ApplicationFiled: October 21, 2003Publication date: April 29, 2004Applicant: Donaldson Company, Inc.Inventors: John R. Hacker, David B. Harder, Jess T. Nordby, Michael J. Gustafson, Alan D. Klein
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Publication number: 20020139735Abstract: Liquid filter constructions include a baffle plate secured to a can, by way of laser welding. A filter element is operably oriented within the interior of the can. The filter element includes a first end cap and a media pack secured to the first end cap. In some embodiments, the first end cap radially abuts an outer, annular surface of a tubular member of the baffle plate to form a radially directed seal between the first end cap and the tubular member. Liquid filter constructions of this type have a burst strength between 500-800 psi (about 3.4-5.5 MPa), along a longitudinal section of the can wall. Constructions of this type eliminate a roll or lock seam, an inner gasket, an inner compressive spring, and a gasket retainer. Systems for using liquid filters are described herein. Methods of constructing and using these types of filter arrangements are also described.Type: ApplicationFiled: February 25, 2002Publication date: October 3, 2002Applicant: Donaldson Company, Inc.Inventors: Eivind Stenersen, David B. Harder, John R. Hacker, Gerald D. Kiral, Ronald W. Streitmatter, Kevin K. Socha
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Publication number: 20020125188Abstract: A liquid filter assembly includes a filter head having an interchangeable spin-on canister filter and a bowl-cartridge filter. Methods of using the liquid filter assembly include providing a filter head capable of operably receiving both a spin-on canister filter and a bowl-cartridge filter. The method also includes operably installing one of the spin-on canister filter and the bowl-cartridge filter onto the filter head to provide a filter assembly. After a period of use, the spin-on canister filter or bowl-cartridge filter is removed and replaced. The replacement can include, interchangeably, a spin-on canister filter and a bowl-cartridge filter. Constructions for accommodating an interchangeable system include preferred arrangements of mechanical connection structure.Type: ApplicationFiled: March 6, 2001Publication date: September 12, 2002Inventors: John R. Hacker, David B. Harder, Jess T. Nordby, Michael J. Gustafson, Alan D. Klein
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Patent number: 6384369Abstract: Liquid filter constructions include a baffle plate secured to a can, by way of laser welding. A filter element is operably oriented within the interior of the can. The filter element includes a first end cap and a media pack secured to the first end cap. In some embodiments, the first end cap radially abuts an outer, annular surface of a tubular member of the baffle plate to form a radially directed seal between the first end cap and the tubular member. Liquid filter constructions of this type have a burst strength between 500-800 psi (about 3.4-5.5 MPa), along a longitudinal section of the can wall. Constructions of this type eliminate a roll or lock seam, an inner gasket, an inner compressive spring, and a gasket retainer. Systems for using liquid filters are described herein. Methods of constructing and using these types of filter arrangements are also described.Type: GrantFiled: September 1, 2000Date of Patent: May 7, 2002Assignees: Donaldson Company, Inc., Caterpillar, Inc.Inventors: Eivind Stenersen, David B. Harder, John R. Hacker, Gerald D. Kiral, Ronald W. Streitmatter, Kevin K. Socha
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Patent number: D646350Type: GrantFiled: October 1, 2010Date of Patent: October 4, 2011Assignees: Caterpillar Inc., Advanced Filtration Systems Inc., Donaldson Company Inc.Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger
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Patent number: D646750Type: GrantFiled: October 1, 2010Date of Patent: October 11, 2011Assignees: Caterpillar Inc., Advanced Filtration Systems Inc., Donaldson Company Inc.Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger
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Patent number: D646751Type: GrantFiled: May 19, 2011Date of Patent: October 11, 2011Assignees: Caterpillar Inc., Advanced Filtration Systems Inc., Donaldson Company Inc.Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger
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Patent number: D648822Type: GrantFiled: October 1, 2010Date of Patent: November 15, 2011Assignees: Caterpillar Inc., Advanced Filtration Systems Inc., Donaldson Company Inc.Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger
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Patent number: D655376Type: GrantFiled: May 19, 2011Date of Patent: March 6, 2012Assignees: Caterpillar Inc., Advanced Filtration Systems Inc., Donaldson Company Inc.Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger
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Patent number: D655781Type: GrantFiled: May 19, 2011Date of Patent: March 13, 2012Assignees: Caterpillar Inc., Advanced Filtration Systems Inc, Donaldson Company Inc.Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger
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Patent number: D656577Type: GrantFiled: May 19, 2011Date of Patent: March 27, 2012Assignees: Caterpillar Inc., Advanced Filtration Systems Inc., Donaldson Company Inc.Inventors: Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, John R. Hacker, Richard J. Eisenmenger