Patents by Inventor Douglas E. Flemming
Douglas E. Flemming 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: 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: 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: 5101095Abstract: A filter apparatus for reducing particulates from exhaust gases from a diesel engine having a housing containing a ceramic filter unit with an array of spirally mounted resistance rods electrically connected in parallel. A ceramic foam element is located behind the array, and is used to reflect heat back to the ceramic filter. A 12 or 24 volt battery is used as the power source.Type: GrantFiled: October 31, 1990Date of Patent: March 31, 1992Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Eugene D. Wilson, Douglas E. Flemming, Ed Steinbrueck
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Patent number: 5053603Abstract: A flat array of a plurality of spiral wound resistance rods backed by a ceramic foam disc for use with filter apparatus for reducing particulates from exhaust gases of an engine. The array of resistance rods is electrically connected in parallel and can be energized by a 12 or 24 volt vehicle battery.Type: GrantFiled: March 30, 1989Date of Patent: October 1, 1991Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Eugene D. Wilson, Douglas E. Flemming, Ed Steinbrueck
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Patent number: 4899540Abstract: Muffler-filter apparatus for reducing both sound and particulates from exhaust gases from an engine. The apparatus includes resonating chambers, flow distribution means and a cellular ceramic core filter module. Filter regeneration mechanism includes a heating element for heating the carbon on the inlet end of the ceramic core to combustion temperature. Particulate ignition resulting in regeneration occurs when combustion air is provided. In alternate embodiments, combustion air first flows through a preheater system. A processor unit with particular logic controls the apparatus. The particular method of regeneration depends on the application in which the muffler-filter is used.Type: GrantFiled: October 15, 1987Date of Patent: February 13, 1990Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Douglas E. Flemming
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Patent number: 4878928Abstract: A filter device for trapping particulates for diesel engine exhaust gases includes an electrical heating element to heat the face of the ceramic filter. A porous ceramic disc is place on the side of the heating element opposite the filter. It has been found that the disc keeps the temperature of the heating element more uniform and reduces the time to particulate ignition on the front face of the filter.Type: GrantFiled: July 28, 1988Date of Patent: November 7, 1989Assignee: Donaldson Company, Inc.Inventors: Wayner M. Wagner, Douglas E. Flemming
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Patent number: 4851015Abstract: Muffler apparatus for reducing both sound and particulates from exhaust gases from an engine. The apparatus includes resonating chambers, flow distribution structure and a cellular ceramic core filter module. Filter regeneration mechanism includes a heating element for heating the carbon on the inlet end of the ceramic core to combustion temperature. Particulate ignition resulting in regeneration occurs when combustion air is provided; in alternate embodiments, combustion air first flows through a preheater system. A processor unit with particular logic controls the apparatus.Type: GrantFiled: August 21, 1987Date of Patent: July 25, 1989Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Douglas E. Flemming, Edward A. Steinbrueck, Bruce B. Hoppenstedt
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Patent number: 4832661Abstract: A mechanism which maintains a required power level for an electrical use device even though the power level would otherwise drop below that which is necessary at engine idle or alternator speed would increase beyond an acceptable maximum at engine hi idle. The apparatus includes a variator pulley along with mechanism for moving the pulley between first and second positions thereby increasing or decreasing the ratio of alternator speed to engine speed.Type: GrantFiled: October 31, 1988Date of Patent: May 23, 1989Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Douglas E. Flemming
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Patent number: 4790574Abstract: A clamp suitable for joining a pair of tubular members, e.g., commercial truck exhaust pipes. One clamp (70) according to the invention includes an S-shaped band (72) having a pair of forward curved portions (76) on either side of a reverse curved portion (78). Attached to each forward curved portion (76) is a reinforcing bar (74) preferably forming a pair of D-shaped holes (75) suitable for receiving "half-carriage" bolts (100). The band (72) is preferably formed from Type 409 stainless steel to reduce costs. A fully preformed (cylindrical) embodiment (120) and flat embodiment (130) are also disclosed.Type: GrantFiled: January 16, 1987Date of Patent: December 13, 1988Assignee: Donaldson Company, Inc.Inventors: Wayne M. Wagner, Douglas E. Flemming, Gary J. Rocklitz, Timothy Bethke