Patents by Inventor David M. Stehouwer
David M. Stehouwer 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: 7913858Abstract: Acid-neutralizing filter media includes filter media fibers in combination with a strong base of small particle size and high surface area attached to and immobilized on the filter media fibers, and methodology therefore.Type: GrantFiled: July 10, 2007Date of Patent: March 29, 2011Assignee: Fleetguard, Inc.Inventors: William C. Haberkamp, David M. Stehouwer, Barry M. Verdegan
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Patent number: 7250126Abstract: Acid-neutralizing filter media includes filter media fibers in combination with a strong base of small particle size and high surface area attached to and immobilized on the filter media fibers, and methodology therefor.Type: GrantFiled: August 11, 2004Date of Patent: July 31, 2007Assignee: Fleetguard, Inc.Inventors: William C. Haberkamp, David M. Stehouwer, Barry M. Verdegan
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Patent number: 6860241Abstract: This invention relates to a fuel filter for use with internal combustion engines. The fuel filter includes a fuel additive that can be released into fuel. The rate of release for the fuel can be controlled. In one form the fuel additive can be mixed with a matrix material and released at a substantially constant rate to maintain a uniform level of fuel additive in the fuel. Use of the present invention provides a fuel filter having an extended life span that is longer than fuel filters typically used with combustion engines.Type: GrantFiled: August 24, 2001Date of Patent: March 1, 2005Assignees: Dober Chemical Corp., Fleetguard, Inc.Inventors: Harold Martin, David M. Stehouwer, Joseph C. Drozd, Yu-Sen Chen
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Publication number: 20020195380Abstract: This invention relates to a fuel filter for use with internal combustion engines. The fuel filter includes a fuel additive that can be released into fuel. The rate of release for the fuel can be controlled. In one form the fuel additive can be mixed with a matrix material and released at a substantially constant rate to maintain a uniform level of fuel additive in the fuel. Use of the present invention provides a fuel filter having an extended life span that is longer than fuel filters typically used with combustion engines.Type: ApplicationFiled: August 24, 2001Publication date: December 26, 2002Inventors: Harold Martin, David M. Stehouwer, Joseph C. Drozd, Yu-Sen Chen
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Patent number: 6319402Abstract: A cleanable backflushable re-usable dual full-flow and bypass filter includes a full-flow filter element providing filtered primary flow therethrough, a bypass filter element providing filtered secondary flow therethrough, a bypass tube conducting flow therethrough from said bypass filter element to said full-flow filter element, a venturi creating a low pressure zone aiding secondary flow through the bypass tube to assist in pulling the secondary flow through the more restrictive bypass filter element, wherein fluid, whether main fluid flow in the filtering direction or backflushing cleansing fluid flow in the opposite direction, flowing from the bypass tube changes direction at the venturi.Type: GrantFiled: December 17, 1999Date of Patent: November 20, 2001Assignee: Nelson Industries, Inc.Inventors: Brian W. Schwandt, Peter K. Herman, David M. Stehouwer
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Patent number: 6273031Abstract: A combination in situ oil filter purge and oil replacement system is provided in a lubrication system, including for an internal combustion engine (10). A purge system backflushes the oil filter (12) and re-circulates backflushed used oil. A replacement system supplies fresh oil to the filter (12).Type: GrantFiled: December 11, 1998Date of Patent: August 14, 2001Assignee: Nelson Industries, Inc.Inventors: Barry M. Verdegan, Peter K. Herman, David M. Stehouwer, Brian W. Schwandt, Stephen L. Fallon
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Patent number: 6238554Abstract: This invention relates to a fuel filter for use with internal combustion engines. The fuel filter includes a fuel additive that can be released into fuel. The rate of release for the fuel can be controlled. In one form the fuel additive can be released a substantially constant rate to maintain a uniform level of fuel additive in the fuel. Use of the present invention provides a fuel filter having an extended life span that is longer than fuel filters typically used with combustion engines.Type: GrantFiled: June 16, 1999Date of Patent: May 29, 2001Assignee: Fleetguard, Inc.Inventors: Harold R. Martin, Jr., David M. Stehouwer
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Publication number: 20010000400Abstract: This invention relates to a fuel filter for use with internal combustion engines. The fuel filter includes a fuel additive that can be released into fuel. The rate of release for the fuel can be controlled. In one form the fuel additive can be released a substantially constant rate to maintain a uniform level of fuel additive in the fuel. Use of the present invention provides a fuel filter having an extended life span that is longer than fuel filters typically used with combustion engines.Type: ApplicationFiled: December 15, 2000Publication date: April 26, 2001Inventors: Harold R. Martin, David M. Stehouwer
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Patent number: 6082322Abstract: An improved method and system for automatically continuously replacing an engine's used lubricating oil with fresh lubricating oil throughout operation based on engine operating conditions is disclosed. The present system includes an injection control device for injecting small amounts of used lube oil into the engine's fuel system and an auxiliary flow control device for directing controlled quantities of fresh oil into the engine's lube oil system. An electronic controller is provided to vary the amount of used lube oil injected into the oil system based on the severity of engine operation. The process periodically determines an engine operating severity value, i.e. fuel consumption value, for an interval of engine operation and calculates a base line quantity of oil for injection based on the current fuel consumption of the engine during the current interval.Type: GrantFiled: December 23, 1998Date of Patent: July 4, 2000Assignee: Cummins Engine Company, Inc.Inventors: John P. Graham, Jerry C. Wang, Leslie A. Roettgen, Donald P. Carver, Colin I. Black, David M. Stehouwer, Ray C. Hatton
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Patent number: 5970942Abstract: An improved method and system for automatically continuously replacing an engine's used lubricating oil with fresh lubricating oil throughout operation based on engine operating conditions is disclosed. The present system includes an lube oil replacement pump system operable in a replacement mode for injecting small amounts of used lube oil into the engine's fuel system and directing controlled quantities of fresh oil into the engine's lube oil system to replace the removed oil. The process periodically determines an engine operating severity value, i.e. fuel consumption value, for an interval of engine operation and calculates a base line quantity of oil for injection based on the current fuel consumption of the engine during the current interval. The lube oil replacement pump may also be operated in a makeup mode for adding quantities of fresh oil to the engine lube oil sump to compensate for oil consumed by the engine.Type: GrantFiled: February 27, 1998Date of Patent: October 26, 1999Assignee: Cummins Engine Company, Inc.Inventors: David E. Koeberlein, Paul D. Cantrell, Eric S. Keith, John P. Graham, Jerry C. Wang, Leslie A. Roettgen, Donald P. Carver, Colin I. Black, David M. Stehouwer, Ray C. Hatton
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Patent number: 5881688Abstract: An improved system for automatically continuously replacing an engine's used lubricating oil with fresh lubricating oil throughout operation based on engine operating conditions is disclosed. The present system includes an intermittent injection control device for intermittently injecting small amounts of used lube oil into the engine's fuel system. An electronic controller is provided to vary the amount of used lube oil injected into the oil system based on the severity of engine operation. The system periodically determines an engine operating severity value, i.e. fuel consumption value, for an interval of engine operation and calculates a base line quantity of oil for injection based on the current fuel consumption of the engine during the current interval. The system may also include an auxiliary flow control device for directing controlled quantities of fresh oil into the engine's lube oil system for maintaining the engine's oil sump at a proper level.Type: GrantFiled: January 14, 1998Date of Patent: March 16, 1999Assignee: Cummins Engine Company, Inc.Inventors: John P. Graham, Jerry C. Wang, Leslie A. Roettgen, Donald P. Carver, Colin I. Black, David M. Stehouwer, Ray C. Hatton
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Patent number: 5749339Abstract: An improved method and system for automatically continuously replacing an engine's used lubricating oil with fresh lubricating oil throughout operation based on engine operating conditions is disclosed. The present system includes an injection control device for injecting small amounts of used lube oil into the engine's fuel system and an auxiliary flow control device for directing controlled quantities of fresh oil into the engine's lube oil system. An electronic controller is provided to vary the amount of used lube oil injected into the oil system based on the severity of engine operation. The process periodically determines an engine operating severity value, i.e. fuel consumption value, for an interval of engine operation and calculates a base line quantity of oil for injection based on the current fuel consumption of the engine during the current interval.Type: GrantFiled: February 28, 1996Date of Patent: May 12, 1998Assignee: Cummins Engine Company, Inc.Inventors: John P. Graham, Jerry C. Wang, Leslie A. Roettgen, Donald P. Carver, Colin I. Black, David M. Stehouwer, Ray C. Hatton
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Patent number: 3996144Abstract: Ashless rust-inhibited lubricating oil compositions comprising a major portion of a mineral lubricating oil, and a minor, rust inhibiting amount of a polyhydric ester represented by the formula: ##STR1## in which R and R' are hydrogen or hydrocarbyl radicals having from 1 to 24 carbon atoms, r, m and n are integers ranging from 0 to 10.Type: GrantFiled: October 23, 1975Date of Patent: December 7, 1976Assignee: Texaco Inc.Inventors: David G. Weetman, Jackson W. Wisner, Jr., David M. Stehouwer