Patents by Inventor James C. Rothman
James C. Rothman 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: 6892854Abstract: An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.Type: GrantFiled: April 11, 2003Date of Patent: May 17, 2005Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Marty A. Barris, Douglas E. Flemming, James C. Rothman, Peter A. Betts
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Publication number: 20040031643Abstract: An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.Type: ApplicationFiled: April 11, 2003Publication date: February 19, 2004Applicant: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Marty A. Barris, Douglas E. Flemming, James C. Rothman, Peter A. Betts
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Patent number: 6550573Abstract: An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.Type: GrantFiled: August 31, 2001Date of Patent: April 22, 2003Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Marty A. Barris, Douglas E. Flemming, James C. Rothman, Peter A. Betts
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Publication number: 20020040826Abstract: An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.Type: ApplicationFiled: August 31, 2001Publication date: April 11, 2002Applicant: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Marty A. Barris, Douglas E. Flemming, James C. Rothman, Peter A. Betts
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Patent number: 5828013Abstract: An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.Type: GrantFiled: November 4, 1996Date of Patent: October 27, 1998Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Marty A. Barris, Douglas E. Flemming, James C. Rothman, Peter A. Betts
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Patent number: 5683479Abstract: An air cleaner construction including a precleaner arrangement, a filter assembly and a scavenger arrangement is provided. In the precleaner arrangement, air directed into the air cleaner assembly is subjected to some particulate removal. The air from the precleaner arrangement is then directed into the filter assembly, for further particulate material. The scavenger arrangement is constructed and arranged to scavenge separated particulate material from both the precleaner arrangement and the filter assembly. A pulse jet cleaner assembly is provided to facilitate removal of particulate material from the filter assembly.Type: GrantFiled: October 22, 1996Date of Patent: November 4, 1997Assignee: Donaldson Company, Inc.Inventors: Gary R. Gillingham, Peter A. Betts, Daniel T. Risch, James C. Rothman, Fred H. Wahlquist
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Patent number: 5575826Abstract: An air cleaner construction including a precleaner arrangement, a filter assembly and a scavenger arrangement is provided. In the precleaner arrangement, air directed into the air cleaner assembly is subjected to some particulate removal. The air from the precleaner arrangement is then directed into the filter assembly, for further particulate material. The scavenger arrangement is constructed and arranged to scavenge separated particulate material from both the precleaner arrangement and the filter assembly. A pulse jet cleaner assembly is provided to facilitate removal of particulate material from the filter assembly.Type: GrantFiled: March 28, 1995Date of Patent: November 19, 1996Assignee: Donaldson Company, Inc.Inventors: Gary R. Gillingham, Peter A. Betts, Daniel T. Risch, James C. Rothman, Fred H. Wahlquist
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Patent number: 5426269Abstract: An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.Type: GrantFiled: March 2, 1993Date of Patent: June 20, 1995Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Marty A. Barris, Douglas E. Flemming, James C. Rothman, Peter A. Betts, John S. Wiese, David E. Winnes
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Patent number: 5401285Abstract: An air cleaner construction including a precleaner arrangement, a filter assembly and a scavenger arrangement is provided. In the precleaner arrangement, air directed into the air cleaner assembly is subjected to some particulate removal. The air from the precleaner arrangement is then directed into the filter assembly, for further particulate material. The scavenger arrangement is constructed and arranged to scavenge separated particulate material from both the precleaner arrangement and the filter assembly. A pulse jet cleaner assembly is provided to facilitate removal of particulate material from the filter assembly.Type: GrantFiled: September 17, 1993Date of Patent: March 28, 1995Assignee: Donaldson Company, Inc.Inventors: Gary R. Gillingham, Peter A. Betts, Daniel T. Risch, James C. Rothman, Fred H. Wahlquist
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Patent number: 5355973Abstract: An apparatus for modifying an exhaust stream of a diesel engine is provided. The apparatus includes a muffler arrangement having an exhaust inlet and an exhaust outlet in construct and arrange for sound attenuation therein. The apparatus also includes a catalytic converter arrangement positioned within the muffler arrangement between the exhaust inlet and exhaust outlet. During operation, the exhaust flow is directed both through the muffler arrangement and the catalytic converter arrangement, to advantage.Type: GrantFiled: June 2, 1992Date of Patent: October 18, 1994Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Marty A. Barris, Douglas E. Flemming, James C. Rothman, Peter A. Betts
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Patent number: 5293742Abstract: A muffler-filter apparatus having a particulate trap using filter tubes with high temperature filter materials, like fiber in the form of yarn, woven yarn mat, or a non-woven, random array fiber mat, or various foams. Filter tubes have various structural configurations and are regenerated by axial propagation using ring heaters or stub rod heaters, by heating the entire length of the filter tube with a rod heater or some other full-length heater configuration. For regeneration, exhaust flow is bypassed using various valve configurations including a poppet valve, a shutter valve, or a tubular valve. Filter tube filters may also be self-regenerated by the heat from the exhaust gases as controlled by a throttle valve or on inclusion of fuel additives which lower particulate ignition temperature.Type: GrantFiled: April 14, 1993Date of Patent: March 15, 1994Assignee: Donaldson Company, Inc.Inventors: Gary R. Gillingham, James C. Rothman, Kelly C. Robertson, Marty A. Barris, Peter Betts, Wayne M. Wagner
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Patent number: 5246205Abstract: A poppet valve assembly is provided. The preferred poppet valve assembly comprises a valve seat, valve head member and actuation arrangement. In the preferred embodiment, the valve head member comprises a flexible seal member and backing member, oriented such that the flexible seal member is positioned between the valve seat and the backing member. In use, the backing member is driven toward the valve seat, trapping the flexible seal member therebetween. The seal member engages the valve seat and is simultaneously deflected backward toward the backing member, which limits deformation of the seal member.Type: GrantFiled: April 6, 1992Date of Patent: September 21, 1993Assignee: Donaldson Company, Inc.Inventors: Gary R. Gillingham, James C. Rothman, Peter A. Betts, Wayne M. Wagner
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Patent number: 5123501Abstract: A sound attenuating device is provided for attenuating noise in an exhaust system. The attenuating device includes an inlet end, an outlet end and a constricted portion therebetween. In use, the attenuating device may be disposed in a tubular housing or may be an integral portion of a tail pipe, connecting pipe, or muffler. Further, a sound suppressing system is described including one or more attenuating regions including attenuating devices. The attenuating regions are spaced to attenuate desired frequencies. Expansion chambers formed between attenuating regions contribute to sound suppression.Type: GrantFiled: October 21, 1988Date of Patent: June 23, 1992Assignee: Donaldson Company, Inc.Inventors: James C. Rothman, Charles O. Reinhart, Donald R. Monson
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Patent number: 4588423Abstract: An apparatus (10) for cleaning a flow of particulate-laden gas is disclosed. The apparatus (10) has a housing (11) having a gas inlet (15) and a gas outlet (16) to permit a flow of gas through the housing (11). Suspended inside the housing (11) is an electrode element (20) having a charging element (26) which defines with the housing (11) a charging chamber (31) adjacent the gas inlet (15) and having an electrostatic force element (25) which defines with the housing (11) a collecting chamber (32) adjacent the gas outlet (16). The electrode element (20) is maintained at a voltage differential from the housing (11) for charging particulate in the charging chamber (31) and subjecting charged particulate in the collecting chamber (32) to an electrostatic force, whereby charged particulate is forced outwardly toward the housing (11) and removed from the gas flow.Type: GrantFiled: July 25, 1984Date of Patent: May 13, 1986Assignee: Donaldson Company, Inc.Inventors: Gary R. Gillingham, James C. Rothman