Patents by Inventor David Todd
David Todd 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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Publication number: 20220220816Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration includes the single VFD, the single shaft electric motor, and the single hydraulic pump mounted on the single pump trailer. A controller associated with the single VFD and is mounted on the single pump trailer. The controller monitors operation parameters associated with an operation of the electric driven hydraulic fracking system as each component of the electric driven hydraulic fracking system operates to determine whether the operation parameters deviate beyond a corresponding operation parameter threshold. Each of the operation parameters provides an indicator as to an operation status of a corresponding component of the electric driven hydraulic fracking system. The controller initiates corrected actions when each operation parameter deviates beyond the corresponding operation threshold.Type: ApplicationFiled: March 29, 2022Publication date: July 14, 2022Inventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Patent number: 11384721Abstract: A dual fuel system for an internal combustion engine includes a first fuel supply of a liquid pilot fuel, a primary fuel supply of a liquid primary fuel, and a dual fuel injector. The dual fuel injector includes a spill valve fluidly connected with a plunger cavity and movable to control a start of injection and an end of injection, and an admission valve. The admission valve is movable to admit a pilot fuel into the fuel injector, such that the pilot fuel is conveyed through an outlet check to form, within a primary fuel passage fluidly connected to the plunger cavity, a segmented fuel charge of leading pilot fuel and trailing primary fuel by displacing some of the primary fuel. The liquid pilot fuel may be a higher cetane/lower octane liquid fuel, and the primary fuel may be a lower cetane/higher octane liquid fuel.Type: GrantFiled: February 4, 2021Date of Patent: July 12, 2022Assignee: Caterpillar Inc.Inventors: Eric Lee Schroeder, David Todd Montgomery, Dana Ray Coldren, Chad Koci
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Patent number: 11384708Abstract: Operating an engine includes injecting a liquid alcohol fuel such as methanol into a stream of compressed intake air at an upstream injection location, and injecting the liquid fuel at a plurality of downstream injection locations into a plurality of streams of the compressed intake air from an intake manifold to combustion cylinders in the engine. A fueling control unit apportions a total injected quantity of the liquid fuel between the upstream injection location and the plurality of downstream injection locations based on a temperature parameter of the compressed intake air. The compressed intake air is combusted with the liquid fuel and a compression ignition pilot fuel in the plurality of combustion cylinders.Type: GrantFiled: June 23, 2021Date of Patent: July 12, 2022Assignee: Caterpillar Inc.Inventors: Eric Lee Schroeder, David Todd Montgomery, Arnold Myoungjin Kim, Michael Bardell, Nikolas Karl Landin, Kenth I. Svensson
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Patent number: 11365712Abstract: A controller for a dedicated exhaust gas recirculation (D-EGR) engine is disclosed. The controller may receive a plurality of cylinder pressure signals, each of which is associated with a respective cylinder in a plurality of cylinders of the D-EGR engine. The plurality of cylinders includes at least one donor cylinder and a set of non-donor cylinders. The controller may receive a crankshaft angle signal associated with a crankshaft of the D-EGR engine. The controller may selectively adjust ignition timing of a cylinder, of the plurality of cylinders, based on the crankshaft angle signal and a cylinder pressure signal, of the plurality of cylinder pressure signals, associated with the cylinder; or a fuel rate of the at least one donor cylinder based on the crankshaft angle signal and a set of cylinder pressure signals, of the plurality of cylinder pressure signals, associated with the set of non-donor cylinders.Type: GrantFiled: November 12, 2020Date of Patent: June 21, 2022Assignee: Caterpillar Inc.Inventors: David Todd Montgomery, Greg Hampson
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Publication number: 20220170332Abstract: Certain embodiments of the present application relate to a variable frequency drive (VFD) cabin for a pump configuration including a mobile trailer on which the VFD cabin is to be mounted. The VFD cabin generally includes a medium-voltage VFD and a ventilation system. In certain embodiments, the ventilation system is configured to generate an overpressure condition within the cabin to discourage the entry of dust and debris into the cabin. In certain embodiments, one or more components of the medium-voltage VFD are coupled to the floor of the cabin via a vibration damping system. In certain embodiments, the VFD cabin may be directly coupled to a chassis of the mobile trailer without an intervening suspension being provided between the VFD cabin and the chassis.Type: ApplicationFiled: February 14, 2022Publication date: June 2, 2022Inventors: John Fischer, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen, John J. Crosetto
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Publication number: 20220162971Abstract: An aftertreatment system for treatment of exhaust gases exiting an engine includes a first Selective Catalytic Reduction (SCR) device in fluid communication with the engine. The first SCR device receives the exhaust gases exiting the engine for reducing a first quantity of oxides of nitrogen (NOx) present in the exhaust gases. The aftertreatment system also includes an oxidation catalyst in fluid communication with the first SCR device. The oxidation catalyst receives the exhaust gases exiting the first SCR device for oxidizing ammonia present in the exhaust gases into a second quantity of NOx. The aftertreatment system further includes a second SCR device in fluid communication with the oxidation catalyst. The second SCR device receives the exhaust gases exiting the oxidation catalyst for reducing the second quantity of NOx.Type: ApplicationFiled: November 23, 2020Publication date: May 26, 2022Applicant: Caterpillar Inc.Inventor: David Todd Montgomery
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Patent number: 11319762Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A pump configuration includes a single VFD configuration, the single shaft electric motor, and the single shaft hydraulic pump mounted on the single pump trailer. The single VFD configuration converts the electric power at the power generation voltage level distributed from the power distribution trailer to a VFD voltage level and drives the single shaft electric motor to control the operation of the single shaft electric motor and the single hydraulic pump. The VFD voltage level is a voltage level that is required to drive the single shaft electric motor. The VFD configuration also controls operation of the auxiliary systems based on the electric power at the auxiliary voltage level.Type: GrantFiled: September 21, 2021Date of Patent: May 3, 2022Assignee: National Service Alliance—Houston LLCInventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Patent number: 11320172Abstract: An air conditioner shut-off system includes an overflow conduit that is coupled, at one end, to the drainage system of an air handler unit of the air conditioner system. The opposite end of the overflow conduit is positioned over an overflow container, which is suspended by a harness at the lower end of the harness. The upper end of the harness being operably coupled to the breaker throw of the main breaker, which is provided on or proximate to the air handler unit. If the drainage system becomes obstructed, water will flow into the overflow container through the conduit, and eventually the mass of the water accumulated in the overflow container will produce enough force acting on the breaker throw through the harness to flip the breaker throw to the OFF position and shut off the air conditioner system.Type: GrantFiled: December 3, 2021Date of Patent: May 3, 2022Inventor: David Todd Walker, Jr.
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Publication number: 20220127945Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. The single VFD converts the electric power of at least 13.8 kV to a VFD rated voltage level of at least 4160V and drives the single shaft electric motor at the VFD voltage level of up to 4160V to control the operation of the single shaft electric motor and the single hydraulic pump. The single shaft electric motor drives the single hydraulic pump with the rotation at the rated RPM level of at least 750 RPM. The single hydraulic pump continuously pumps the fracking media into the well at the HP level of at least 5000 HP. The single hydraulic pump operates on a continuous duty cycle to continuously pump the fracking media at the HP level of at least 5000 HP.Type: ApplicationFiled: January 11, 2022Publication date: April 28, 2022Inventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Patent number: 11312738Abstract: The present disclosure relates to a perovskite that includes ABX3, where A is an organic cation, B is a second cation, X is an anion, and the perovskite has a film density (?) of less than 4.37 g/cm3. In some embodiments of the present disclosure, the film density may be in the range, 4.1 g/cm3???4.37 g/cm3. In some embodiments of the present disclosure, the organic cation may include at least one of dimethylammonium (DMA), guanidinium (GA), and/or acetamidinium (Ac). In some embodiments of the present disclosure, A may further include cesium.Type: GrantFiled: November 8, 2019Date of Patent: April 26, 2022Assignee: Alliance for Sustainable Energy, LLCInventors: Tomas Leijtens, David Todd Moore, Giles Edward Eperon
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Patent number: 11286736Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration includes the single VFD, the single shaft electric motor, and the single hydraulic pump mounted on the single pump trailer. A controller associated with the single VFD and is mounted on the single pump trailer. The controller monitors operation parameters associated with an operation of the electric driven hydraulic fracking system as each component of the electric driven hydraulic fracking system operates to determine whether the operation parameters deviate beyond a corresponding operation parameter threshold. Each of the operation parameters provides an indicator as to an operation status of a corresponding component of the electric driven hydraulic fracking system. The controller initiates corrected actions when each operation parameter deviates beyond the corresponding operation threshold.Type: GrantFiled: October 26, 2021Date of Patent: March 29, 2022Assignee: National Service Alliance—Houston LLCInventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Patent number: 11274512Abstract: Certain embodiments of the present application relate to a variable frequency drive (VFD) cabin for a pump configuration including a mobile trailer on which the VFD cabin is to be mounted. The VFD cabin generally includes a medium-voltage VFD and a ventilation system. In certain embodiments, the ventilation system is configured to generate an overpressure condition within the cabin to discourage the entry of dust and debris into the cabin. In certain embodiments, one or more components of the medium-voltage VFD are coupled to the floor of the cabin via a vibration damping system. In certain embodiments, the VFD cabin may be directly coupled to a chassis of the mobile trailer without an intervening suspension being provided between the VFD cabin and the chassis.Type: GrantFiled: October 11, 2021Date of Patent: March 15, 2022Assignee: National Service Alliance—Houston LLCInventors: John Fischer, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen, John J. Crosetto
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Publication number: 20220065089Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A power distribution trailer distributes the electric power generated by the power generation system at the power generation voltage level to the single VFD and converts the electric power at a power generation voltage level to a VFD voltage level and controls the operation of the single shaft electric motor and the single hydraulic pump. The power distribution trailer converts the electric power generated by the power generation system at the power generation level to an auxiliary voltage level that is less than the power generation voltage level. The power distribution trailer distributes the electric power at the auxiliary voltage level to the single VFD that controls an operation of the of the auxiliary systems.Type: ApplicationFiled: November 9, 2021Publication date: March 3, 2022Inventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Publication number: 20220042385Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration includes the single VFD, the single shaft electric motor, and the single hydraulic pump mounted on the single pump trailer. A controller associated with the single VFD and is mounted on the single pump trailer. The controller monitors operation parameters associated with an operation of the electric driven hydraulic fracking system as each component of the electric driven hydraulic fracking system operates to determine whether the operation parameters deviate beyond a corresponding operation parameter threshold. Each of the operation parameters provides an indicator as to an operation status of a corresponding component of the electric driven hydraulic fracking system. The controller initiates corrected actions when each operation parameter deviates beyond the corresponding operation threshold.Type: ApplicationFiled: October 26, 2021Publication date: February 10, 2022Inventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Publication number: 20220025723Abstract: Certain embodiments of the present application relate to a variable frequency drive (VFD) cabin for a pump configuration including a mobile trailer on which the VFD cabin is to be mounted. The VFD cabin generally includes a medium-voltage VFD and a ventilation system. In certain embodiments, the ventilation system is configured to generate an overpressure condition within the cabin to discourage the entry of dust and debris into the cabin. In certain embodiments, one or more components of the medium-voltage VFD are coupled to the floor of the cabin via a vibration damping system. In certain embodiments, the VFD cabin may be directly coupled to a chassis of the mobile trailer without an intervening suspension being provided between the VFD cabin and the chassis.Type: ApplicationFiled: October 11, 2021Publication date: January 27, 2022Inventors: John Fischer, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen, John J. Crosetto
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Patent number: 11220896Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. The single VFD converts the electric power of at least 13.8 kV to a VFD rated voltage level of at least 4160 V and drives the single shaft electric motor at the VFD voltage level of up to 4160 V to control the operation of the single shaft electric motor and the single hydraulic pump. The single shaft electric motor drives the single hydraulic pump with the rotation at the rated RPM level of at least 750 RPM. The single hydraulic pump continuously pumps the fracking media into the well at the HP level of at least 5000 HP. The single hydraulic pump operates on a continuous duty cycle to continuously pump the fracking media at the HP level of at least 5000 HP.Type: GrantFiled: July 6, 2021Date of Patent: January 11, 2022Assignee: National Service Alliance—Houston LLCInventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Publication number: 20220003060Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A pump configuration includes a single VFD configuration, the single shaft electric motor, and the single shaft hydraulic pump mounted on the single pump trailer. The single VFD configuration converts the electric power at the power generation voltage level distributed from the power distribution trailer to a VFD voltage level and drives the single shaft electric motor to control the operation of the single shaft electric motor and the single hydraulic pump. The VFD voltage level is a voltage level that is required to drive the single shaft electric motor. The VFD configuration also controls operation of the auxiliary systems based on the electric power at the auxiliary voltage level.Type: ApplicationFiled: September 21, 2021Publication date: January 6, 2022Inventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Publication number: 20210394669Abstract: A control system for a turn/brake light of a vehicle, includes a control circuit configured to receive a plurality of analog voltage inputs and to deliver an analog voltage output based at least upon the plurality of inputs. A light emitter is connected to the control circuit. The light emitter includes at least one dual-color LED configured to be selectively illuminated based on the analog voltage output. The control circuit can receive a turn/brake signal and produce at least a first output voltage and a second output voltage. The dual-color LED produces a first color output in response to the first output voltage level and a second color output in response to the second output voltage level.Type: ApplicationFiled: June 18, 2020Publication date: December 23, 2021Inventor: David Todd Pribula
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Patent number: 11168556Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. A power distribution trailer distributes the electric power generated by the power generation system at the power generation voltage level to the single VFD and converts the electric power at a power generation voltage level to a VFD voltage level and controls the operation of the single shaft electric motor and the single hydraulic pump. The power distribution trailer converts the electric power generated by the power generation system at the power generation level to an auxiliary voltage level that is less than the power generation voltage level. The power distribution trailer distributes the electric power at the auxiliary voltage level to the single VFD that controls an operation of the of the auxiliary systems.Type: GrantFiled: April 26, 2021Date of Patent: November 9, 2021Assignee: National Service Alliance—Houston LLCInventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen
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Publication number: 20210332653Abstract: An electric driven hydraulic fracking system is disclosed. A pump configuration that includes the single VFD, the single shaft electric motor, and the single hydraulic pump that is mounted on the single pump trailer. The single VFD converts the electric power of at least 13.8 kV to a VFD rated voltage level of at least 4160 V and drives the single shaft electric motor at the VFD voltage level of up to 4160 V to control the operation of the single shaft electric motor and the single hydraulic pump. The single shaft electric motor drives the single hydraulic pump with the rotation at the rated RPM level of at least 750 RPM. The single hydraulic pump continuously pumps the fracking media into the well at the HP level of at least 5000 HP. The single hydraulic pump operates on a continuous duty cycle to continuously pump the fracking media at the HP level of at least 5000 HP.Type: ApplicationFiled: July 6, 2021Publication date: October 28, 2021Inventors: John Fischer, John J. Crosetto, David Kubricht, Richard Cheatham, Jeffrey Pollack, Chad Lawman, David Todd, Tyler Nolen