Patents by Inventor Kent Stewart
Kent Stewart 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: 10234496Abstract: The subject matter of this specification can be embodied in, among other things, a method that includes evaluating an analog electrical current waveform, determining a Boolean waveform based on the evaluated analog electrical current waveform, determining a collection of one or more first durations based on one or more on times identified from the Boolean waveform, determining a collection of one or more second durations based on one or more off times identified from the Boolean waveform, comparing the first durations and the second durations, determining, based on the comparing, an event based on the comparing, identifying a time at which the event occurred, and providing the time as a completion time.Type: GrantFiled: February 16, 2016Date of Patent: March 19, 2019Assignee: Woodward, Inc.Inventors: Suraj Nair, Doyle Kent Stewart
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Publication number: 20170234920Abstract: The subject matter of this specification can be embodied in, among other things, a method that includes evaluating an analog electrical current waveform, determining a Boolean waveform based on the evaluated analog electrical current waveform, determining a collection of one or more first durations based on one or more on times identified from the Boolean waveform, determining a collection of one or more second durations based on one or more off times identified from the Boolean waveform, comparing the first durations and the second durations, determining, based on the comparing, an event based on the comparing, identifying a time at which the event occurred, and providing the time as a completion time.Type: ApplicationFiled: February 16, 2016Publication date: August 17, 2017Inventors: Suraj Nair, Doyle Kent Stewart
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Patent number: 9297321Abstract: A flexible crank angle position sensing device and data structure is provided. The device allows a user to enter specific data into a data structure relating to an encoder wheel used to determine the position of the crank shaft. The specific data is stored in the device and can be recalled for use in specific engine implementations. Furthermore, a user can enter data to describe other encoder wheels associated with a cam shaft of an engine. A data structure relating to a cam shaft encoder wheel relates to the data structure relating to the crank shaft encoder wheel such that various positional information, regarding both the cam shaft and crank shaft, can be detected by the device.Type: GrantFiled: December 13, 2011Date of Patent: March 29, 2016Assignee: Woodward, Inc.Inventors: Wayne Hawken, Doyle Kent Stewart
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Patent number: 8931457Abstract: A multiplexing drive circuit for an AC ignition system having a common leg that includes two switches coupled in series, and one or more dedicated legs, wherein each leg includes two switches coupled in series. The multiplexing drive circuit also includes a transformer for each of the one or more dedicated legs, each transformer having a primary winding coupled between one of the one or more dedicated legs and the common leg, and wherein each transformer has a secondary winding coupled in parallel to a spark plug, and a pulse-width modulated (PWM) switch controller configured to operate the common leg and dedicated leg switches to control characteristics of the spark discharge for the spark plug. Wherein the switch controller is capable of real time diagnostic checks by monitoring the time at which a spark discharge event takes place.Type: GrantFiled: July 1, 2011Date of Patent: January 13, 2015Assignee: Woodward, Inc.Inventors: David C. Petruska, Doyle Kent Stewart, Monte Lee Wegner, Gerald Michael Eberhardt
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Publication number: 20130151194Abstract: A flexible crank angle position sensing device and data structure is provided. The device allows a user to enter specific data into a data structure relating to an encoder wheel used to determine the position of the crank shaft. The specific data is stored in the device and can be recalled for use in specific engine implementations. Furthermore, a user can enter data to describe other encoder wheels associated with a cam shaft of an engine. A data structure relating to a cam shaft encoder wheel relates to the data structure relating to the crank shaft encoder wheel such that various positional information, regarding both the cam shaft and crank shaft, can be detected by the device.Type: ApplicationFiled: December 13, 2011Publication date: June 13, 2013Applicant: Woodward, Inc.Inventors: Wayne Hawken, Doyle Kent Stewart
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Publication number: 20130068418Abstract: One embodiment of the invention is a thermosiphon vessel for storing seasonal environment energy in the ground. The thermosiphon includes: a fluid vessel comprising a heat exchange tube, configured to contain a working fluid, and further configured to receive a fluid inlet and a fluid outlet; a wicking material arranged within the fluid vessel and configured to retain liquid-state working fluid substantially adjacent an inner wall of the heat exchange tube; a fluid level sensor arranged within the fluid vessel and configured to determine the level of liquid-state working fluid therein; and a pump arranged within the fluid vessel and configured to maintain the level of liquid-state working fluid below a threshold level within the fluid vessel. The pump is operable between an energy capture mode to absorb thermal energy from an above-ground heat source and an energy release mode to release thermal energy to an above-ground heat sink.Type: ApplicationFiled: March 16, 2012Publication date: March 21, 2013Inventors: Eric Joseph Gotland, Kent Stewart Udell
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Publication number: 20110255208Abstract: A multiplexing drive circuit for an AC ignition system having a common leg that includes two switches coupled in series, and one or more dedicated legs, wherein each leg includes two switches coupled in series. The multiplexing drive circuit also includes a transformer for each of the one or more dedicated legs, each transformer having a primary winding coupled between one of the one or more dedicated legs and the common leg, and wherein each transformer has a secondary winding coupled in parallel to a spark plug, and a pulse-width modulated (PWM) switch controller configured to operate the common leg and dedicated leg switches to control characteristics of the spark discharge for the spark plug. Wherein the switch controller is capable of real time diagnostic checks by monitoring the time at which a spark discharge event takes place.Type: ApplicationFiled: July 1, 2011Publication date: October 20, 2011Applicant: WOODWARD, INC.Inventors: David C. Petruska, Doyle Kent Stewart, Monte Lee Wegner, Gerald Michael Eberhardt
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Publication number: 20100305918Abstract: The invention provides systems and methods for cooling and/or heating a structure. Generally, a system for heating or cooling a structure can include at least one thermosiphon in thermal communication with a thermal storage material such as a volume of earth. The thermosiphon can be partially filled with a heat transfer fluid and a heat exchanger operatively connected to the thermosiphon which is in thermal communication with the structure. Thermal energy can be transferred between the thermal storage material and the structure in either a passive or assisted mode, depending on whether the system is charging or in use.Type: ApplicationFiled: November 7, 2008Publication date: December 2, 2010Applicant: UNIVERSITY OF UTAH RESEARCH FOUNDATIONInventor: Kent Stewart Udell
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Patent number: 7665714Abstract: A fail safe mechanism having a return member, valve stem extension, energy storage member, and locking assembly. The valve stem extension is driven by an electrical actuator and configured to drive the return member in a first direction and to be driven by the return member in a second direction. The energy storage member is configured to store energy when the electrical actuator causes the valve stem extension to drive the return member in the first direction and to release the energy stored therein when a disruption of power causes the return member to drive the valve stem extension in the second direction. The locking assembly is configured to hold the return member in a cocked position such that the valve stem extension rotates with the valve independently of the return member and free of influence from the energy storage member while the power is applied to the electrical actuator.Type: GrantFiled: August 15, 2007Date of Patent: February 23, 2010Assignee: Woodward Governor CompanyInventors: Steven Charles Stumbo, Doyle Kent Stewart, Jerry Kaminski
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Publication number: 20090045365Abstract: A fail safe mechanism having a return member, valve stem extension, energy storage member, and locking assembly. The valve stem extension is driven by an electrical actuator and configured to drive the return member in a first direction and to be driven by the return member in a second direction. The energy storage member is configured to store energy when the electrical actuator causes the valve stem extension to drive the return member in the first direction and to release the energy stored therein when a disruption of power causes the return member to drive the valve stem extension in the second direction. The locking assembly is configured to hold the return member in a cocked position such that the valve stem extension rotates with the valve independently of the return member and free of influence from the energy storage member while the power is applied to the electrical actuator.Type: ApplicationFiled: August 15, 2007Publication date: February 19, 2009Applicant: WOODWARD GOVERNOR COMPANYInventors: Steven Charles Stumbo, Doyle Kent Stewart, Jerry Kaminski
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Publication number: 20070265302Abstract: The present invention relates to compounds which inhibit dipeptidyl peptidase IV (DPP-IV) and are useful for the prevention or treatment of diabetes, especially type II diabetes, as well as hyperglycemia, Syndrome X, hyperinsulinemia, obesity, atherosclerosis, and various immunomodulatory diseases.Type: ApplicationFiled: July 25, 2007Publication date: November 15, 2007Inventors: David Madar, Stevan Djuric, Melissa Michmerhuizen, Hana Kopecka, Xiaofeng Li, Kenton Longenecker, Zhonghua Pei, Daisy Pireh, Hing Sham, Kent Stewart, Bruce Szezepankiewicz, Paul Wiedeman, Hong Yong
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Publication number: 20070238753Abstract: The present invention relates to compounds that inhibit dipeptidyl peptidase IV (DPP-IV) and are useful for the prevention or treatment of diabetes, especially type II diabetes, as well as hyperglycemia, Syndrome X, hyperinsulinemia, obesity, atherosclerosis, and various immunomodulatory diseases.Type: ApplicationFiled: June 1, 2007Publication date: October 11, 2007Inventors: David Madar, Stevan Djuric, Melissa Michmerhuizen, Hana Kopecka, Xiaofeng Li, Kenton Longenecker, Zhonghua Pei, Daisy Pireh, Hing Sham, Kent Stewart, Bruce Szczepankiewicz, Paul Wiedeman, Hong Yong
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Publication number: 20070049596Abstract: The present invention relates to compounds, which inhibit dipeptidyl peptidase IV (DPP-IV) and are useful for the prevention or treatment of diabetes, especially type II, as well as hyperglycemia, metabolic syndrome, hyperinsulinemia, obesity, atherosclerosis, various immunomodulatory diseases, and other diseases.Type: ApplicationFiled: August 25, 2006Publication date: March 1, 2007Inventors: Zhonghua Pei, Thomas Geldern, David Madar, Xiaofeng Li, Fatima Basha, Hong Yong, Kenton Longenecker, Bradley Backes, Andrew Judd, Matthew Mulhern, Kent Stewart
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Publication number: 20060270663Abstract: Compounds having the Formula (I) are useful for inhibiting protein tyrosine kinases. The present invention also discloses methods of making the compounds, compositions containing the compounds, and methods of treatment using the compounds.Type: ApplicationFiled: May 12, 2006Publication date: November 30, 2006Inventors: Vijaya Gracias, Celerino Abad-Zapatero, Stevan Djuric, Zhiqin Ji, Michael Michaelides, Kent Stewart, Irini Zanze
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Publication number: 20060264433Abstract: The present invention relates to compounds, which inhibit dipeptidyl peptidase IV (DPP-IV) and are useful for the prevention or treatment of diabetes, especially type II diabetes, as well as hyperglycemia, syndrome X, hyperinsulinemia, obesity, atherosclerosis, various immunomodulatory diseases, and other diseases.Type: ApplicationFiled: May 23, 2006Publication date: November 23, 2006Inventors: Bradley Backes, Gregory Hamilton, Hana Kopecka, Chunqiu Lai, Kenton Longenecker, David Madar, Zhonghua Pei, Kent Stewart, Thomas Von Geldern
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Publication number: 20050215784Abstract: The present invention relates to compounds that inhibit dipeptidyl peptidase IV (DPP-IV) and are useful for the prevention or treatment of diabetes, especially type II diabetes, as well as hyperglycemia, Syndrome X, hyperinsulinemia, obesity, atherosclerosis, and various immunomodulatory diseases.Type: ApplicationFiled: January 13, 2005Publication date: September 29, 2005Inventors: David Madar, Stevan Djuric, Melissa Michmerhuizen, Hana Kopecka, Xiaofeng Li, Kenton Longenecker, Zhonghua Pei, Daisy Pireh, Hing Sham, Kent Stewart, Bruce Szczepankiewicz, Paul Wiedeman, Hong Yong
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Publication number: 20050107364Abstract: Compounds having the formula are hepatitis C (HCV) polymerase inhibitors. Also disclosed are a composition and method for inhibiting hepatitis C (HCV) polymerase, processes for making the compounds, and synthetic intermediates employed in the processes.Type: ApplicationFiled: August 24, 2004Publication date: May 19, 2005Inventors: Douglas Hutchinson, John Bellettini, David Betebenner, Richard Bishop, Thomas Borchardt, Todd Bosse, Russell Cink, Charles Flentge, Bradley Gates, Brian Green, Mira Hinman, Peggy Huang, Larry Klein, Allan Krueger, Daniel Larson, M. Leanna, Dachun Liu, Darold Madigan, Keith McDaniel, John Randolph, Todd Rockway, Teresa Rosenberg, Kent Stewart, Vincent Stoll, Rolf Wagner, Ming Yeung
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Patent number: 6752135Abstract: A control valve module for gaseous fuels on spark ignited reciprocating engines is presented. The control valve module has a valve that controls gaseous fuel flow to a mixer or other device for air/fuel ratio control, an actuator for moving the valve position, and a controller. The controller receives a signal from a heated exhaust gas oxygen (HEGO) sensor that is an indication of the fuel/air ratio and actuates the valve to control the combustion mixture to a precise stoichiometric ratio.Type: GrantFiled: November 12, 2002Date of Patent: June 22, 2004Assignee: Woodward Governor CompanyInventors: Bryant K. McLaughlin, Justin L. Fulton, Larry O. Gray, Doyle Kent Stewart, Gary McDaniel
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Publication number: 20040089279Abstract: A control valve module for gaseous fuels on spark ignited reciprocating engines is presented. The control valve module has a valve that controls gaseous fuel flow to a mixer or other device for air/fuel ratio control, an actuator for moving the valve position, and a controller. The controller receives a signal from a heated exhaust gas oxygen (HEGO) sensor that is an indication of the fuel/air ratio and actuates the valve to control the combustion mixture to a precise stoichiometric ratio.Type: ApplicationFiled: November 12, 2002Publication date: May 13, 2004Applicant: Woodward Governor CompanyInventors: Bryant K. McLaughlin, Justin L. Fulton, Larry O. Gray, Doyle Kent Stewart, Gary McDaniel
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Patent number: 6593314Abstract: The present invention provides compounds of formula Ia and Ib or a pharmaceutically acceptable salt, prodrug, or ester thereof, useful in the inhibition of neuraminidase enzymes from disease-causing microorganisms, especially influenza neuraminidase, pharmaceutical formulations containing same, processes and intermediates for preparing said compounds, as well as methods of using said compounds, including preventing and treating diseases caused by microorganisms having said neuraminidase enzyme.Type: GrantFiled: September 22, 2000Date of Patent: July 15, 2003Assignee: Abbott LaboratoriesInventors: Clarence J. Maring, Vincent L. Giranda, Yu Gui Gu, Stephen Hanessian, Dale J. Kempf, Darold L. Madigan, Kent Stewart, Vincent S. Stoll, Minghua Sun, Gary T. Wang, Jianchio Wang, Chen Zhao