Patents by Inventor Alexander Nelson
Alexander Nelson 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: 9479048Abstract: A method of driving an isolated converter includes opening a first bi-directional switch on an input side of a transformer, accepting current into a resonant capacitor connected across the first bi-directional switch to reduce voltage across the first bi-directional switch in response to said opening the first bi-directional switch, reversing current out of the resonant capacitor, and closing the first bi-directional switch as voltage across the first bi-directional switch is approximately zero volts.Type: GrantFiled: September 9, 2014Date of Patent: October 25, 2016Assignee: AEROVIRONMENT, INC.Inventors: Peter Erik Gabrielsson, Nader Michael Lotfy, Alexander Nelson Brooks
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Publication number: 20160191600Abstract: Described herein is an end-to-end solution (i.e., capable of constructing a content delivery network all the way from an origin server to end user devices) which provides a managerial overview to what has been a very disjoint build-out of networks. In the past, networks have evolved to serve particular needs, as opposed to being architected from a strategic view. What this does is to allow someone (e.g., content provider, network operator, etc.) to impose a strategy over those networks. Rather than having to construct solutions that deliver a particular kind of content, a particular security requirement, a particular latency requirement, etc., one can simply provision particular types of nodes as needed when needed.Type: ApplicationFiled: December 31, 2014Publication date: June 30, 2016Inventors: John M. Scharber, Richard Pugh, Michael Kilian, Charles Alexander Nelson, Bill Wilcox
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Publication number: 20160153349Abstract: A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.Type: ApplicationFiled: January 28, 2016Publication date: June 2, 2016Applicant: AeroVironment, Inc.Inventors: Alexander Nelson Brooks, James Gallagher Daley
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Patent number: 9267440Abstract: A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.Type: GrantFiled: July 6, 2013Date of Patent: February 23, 2016Assignee: AeroVironment, Inc.Inventors: Alexander Nelson Brooks, James Gallagher Daley
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Patent number: 9234246Abstract: A decentralized load shedding device turns off a load in response to determining that an electric grid is approaching its maximum operating point. By turning off the load, demand on the electric grid is minimized thereby reducing the likelihood of blackouts. The device may be coupled to the load or may be incorporated into the load in one embodiment.Type: GrantFiled: April 11, 2012Date of Patent: January 12, 2016Assignee: Google Inc.Inventors: Benjamin Davis, Alexander Nelson Brooks
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Patent number: 9226034Abstract: Apparatus and devices are described for generating clips by executing one or more tasks contained in a recipe. The recipe can be received at a server, such as a content server, perhaps as part of a clip request. The server can generate a clip by parsing the recipe. Parsing the recipe can include determining whether a given task of the one or more tasks is a data-source task and, in response to determining that the given task is a data-source task, extracting one or more slices of data from a data source specified in the data-source task and adding the one or more slices to the clip. The data source can include a video data source or a combined video and audio data source. Once generated, the clip can be sent from the server.Type: GrantFiled: May 10, 2011Date of Patent: December 29, 2015Assignee: GOOGLE INC.Inventors: Ben S. Hayden, Charles Alexander Nelson, Andrew D. Berkheimer, Prasanna Meda
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Patent number: 9211922Abstract: A robotic vehicle is provided with improved traction and mobility via a specially designed wheel apparatus including a relatively rigid wheel structure formed from two circular, coaxial sprocketed wheel plates separated by a central hub. The sprockets on the wheel plates are circumferentially aligned with one another, with axially facing sprocket pairs being received in areas defined between circumferentially adjacent pairs of tread links in a series of tread links, equal in number to the number of sprocket pairs, arranged in a circular array around the periphery of the wheel structure. The sprocket pairs are sized and configured in a manner such that substantial relative axial and circumferential movement between the wheel structure and the tread link array are blocked, with the axially facing sprockets in each sprocket pair being axially and resiliently deflected toward one another by surface portions of their associated tread link area.Type: GrantFiled: August 17, 2012Date of Patent: December 15, 2015Assignee: Cardinal Gibbons High SchoolInventors: Ariana Jacqueline Keeling, Kirby Shane Cook, Timothy Paul Kowalczyk, Aaron Joseph Ruff, Sean Michael McDonald, Sean Michael Greene, Marc Celestini, Brian Alexander Nelson
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Publication number: 20150273687Abstract: A robotic vehicle is provided with an extendable arm and a mandible structure. The mandible structure includes a pair of mandibles with toothed portions that cooperatively engage such that the mandibles may be opened and closed by applying a force to only one of the pair of mandibles. The mandible structure hangs freely from the extendable arm and is balanced so that the mandible structure naturally maintains a substantially vertical orientation. In the closed position, the mandible structure defines an interior cavity suitable for securely grasping a ring.Type: ApplicationFiled: March 25, 2014Publication date: October 1, 2015Applicant: CARDINAL GIBBONS HIGH SCHOOLInventors: Sean Michael Greene, Benjamin Gerard Gravel, Aaron Joseph Ruff, Sean Michael McDonald, Brian Alexander Nelson, Austin Laboy Schick, Colin Daniel Russell
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Publication number: 20150131337Abstract: A method of driving an isolated converter includes opening a first bi-directional switch on an input side of a transformer, accepting current into a resonant capacitor connected across the first bi-directional switch to reduce voltage across the first bi-directional switch in response to said opening the first bi-directional switch, reversing current out of the resonant capacitor, and closing the first bi-directional switch as voltage across the first bi-directional switch is approximately zero volts.Type: ApplicationFiled: September 9, 2014Publication date: May 14, 2015Inventors: Peter Erik Gabrielsson, Nader Michael Lotfy, Alexander Nelson Brooks
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Patent number: 8960482Abstract: A hydrogen storage tank for a hydrogen fueled aircraft. The tank has a wall made of layers of aerogel sections around a hard shell layer, sealed within a flexible outer layer, and having the air removed to form a vacuum. The periphery of each layer section abuts other sections of that layer, but only overlies the periphery of the sections of other layers at individual points. The wall is characterized by a thermal conductivity that is lower near its gravitational top than its gravitational bottom. The tank has two exit passageways, one being direct, and the other passing through a vapor shield that extends through the wall between two layers of aerogel. A control system controls the relative flow through the two passages to regulate the boil-off rate of the tank.Type: GrantFiled: September 23, 2009Date of Patent: February 24, 2015Assignee: AeroVironment Inc.Inventors: Alexander Nelson Brooks, Bart Dean Hibbs, David Robert Thompson
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Publication number: 20150015213Abstract: In some embodiments, the present invention includes the use of one or more electric power supply system, or systems, and the electric vehicle, or vehicles, connected thereto, to provide load-based utility grid frequency regulation by varying the amount of power drawn by the vehicle or vehicles.Type: ApplicationFiled: March 28, 2013Publication date: January 15, 2015Applicant: AEROVIRONMENT, INC.Inventors: Alexander Nelson Brooks, Scott Garret Berman, Nicholas Hammervold
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Publication number: 20140130508Abstract: A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.Type: ApplicationFiled: July 6, 2013Publication date: May 15, 2014Applicant: AeroVironment Inc.Inventors: Alexander Nelson Brooks, James Gallagher Daley
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Publication number: 20140049098Abstract: A robotic vehicle is provided with improved traction and mobility via a specially designed wheel apparatus including a relatively rigid wheel structure formed from two circular, coaxial sprocketed wheel plates separated by a central hub. The sprockets on the wheel plates are circumferentially aligned with one another, with axially facing sprocket pairs being received in areas defined between circumferentially adjacent pairs of tread links in a series of tread links, equal in number to the number of sprocket pairs, arranged in a circular array around the periphery of the wheel structure. The sprocket pairs are sized and configured in a manner such that substantial relative axial and circumferential movement between the wheel structure and the tread link array are blocked, with the axially facing sprockets in each sprocket pair being axially and resiliently deflected toward one another by surface portions of their associated tread link area.Type: ApplicationFiled: August 17, 2012Publication date: February 20, 2014Applicant: Cardinal Gibbons High SchoolInventors: Ariana Jacqueline Keeling, Kirby Shane Cook, Timothy Paul Kowalczyk, Aaron Joseph Ruff, Sean Michael McDonald, Sean Michael Greene, Marc Celestini, Brian Alexander Nelson
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Patent number: 8507287Abstract: The present invention provides methods and materials for isolating, purifying, and/or enriching the concentration of compounds having one or more phosphate groups and/or derivatives thereof, including but not limited to phosphorylated peptides and/or phosphorylated proteins. In some aspects, the present invention provides nanostructured enrichment materials, such as metal oxide mesoporous materials, that selectively and reversibly bind with phosphorylated compounds with high specificity and are capable of controlled release of phosphorylated compounds bound to their active surfaces. Mesoporous materials of the present invention also provide enrichment materials having large active surface areas that provide for higher loading capacities for phosphorylated peptides and proteins relative to conventional affinity based methods.Type: GrantFiled: September 11, 2009Date of Patent: August 13, 2013Assignee: Wisconsin Alumni Research FoundationInventors: Song Jin, Ying Ge, Cory Alexander Nelson, Qingge Xu
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Patent number: 8490917Abstract: A high-altitude aircraft powerplant including an engine, a two-stage turbocharger having an intercooler and an aftercooler, a cryogenic hydrogen fuel source, and a cooling system including a hydrogen heat exchanger. Aided by a ram-air cooler that cools a coolant to a near-ambient temperature, the heat exchanger is configured to heat the hydrogen using the coolant, and to cool the coolant to a temperature well below the ambient temperature during high-altitude flight. The intercooler and aftercooler use the sub-ambient temperature coolant, as does a separate sensor. The ram-air cooler includes a front portion and a rear portion. The cooling system includes three cooling loops which respectively incorporate only the front portion, only the rear portion, and both portions of the ram-air cooler.Type: GrantFiled: June 8, 2012Date of Patent: July 23, 2013Assignee: AeroVironment Inc.Inventors: Alexander Nelson Brooks, James Gallagher Daley, Bart Dean Hibbs
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Patent number: 8479718Abstract: A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.Type: GrantFiled: May 31, 2012Date of Patent: July 9, 2013Assignee: AeroVironment Inc.Inventors: Alexander Nelson Brooks, James Gallagher Daley
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Publication number: 20130074812Abstract: A high-altitude aircraft powerplant including an engine, a two-stage turbocharger having an intercooler and an aftercooler, a cryogenic hydrogen fuel source, and a cooling system including a hydrogen heat exchanger. Aided by a ram-air cooler that cools a coolant to a near-ambient temperature, the heat exchanger is configured to heat the hydrogen using the coolant, and to cool the coolant to a temperature well below the ambient temperature during high-altitude flight. The intercooler and aftercooler use the sub-ambient temperature coolant, as does a separate sensor. The ram-air cooler includes a front portion and a rear portion. The cooling system includes three cooling loops which respectively incorporate only the front portion, only the rear portion, and both portions of the ram-air cooler.Type: ApplicationFiled: June 8, 2012Publication date: March 28, 2013Inventors: Alexander Nelson Brooks, James Gallagher Daley, Bart Dean Hibbs
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Publication number: 20120279971Abstract: A hydrogen storage tank for a hydrogen fueled aircraft. The tank has a wall made of layers of aerogel sections around a hard shell layer, sealed within a flexible outer layer, and having the air removed to form a vacuum. The periphery of each layer section abuts other sections of that layer, but only overlies the periphery of the sections of other layers at individual points. The wall is characterized by a thermal conductivity that is lower near its gravitational top than its gravitational bottom. The tank has two exit passageways, one being direct, and the other passing through a vapor shield that extends through the wall between two layers of aerogel. A control system controls the relative flow through the two passages to regulate the boil-off rate of the tank.Type: ApplicationFiled: June 26, 2012Publication date: November 8, 2012Applicant: AEROVIRONMENT INC.Inventors: Alexander Nelson BROOKS, Bart Dean HIBBS, David Robert THOMPSON
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Publication number: 20120247122Abstract: A hydrogen fueled powerplant including an internal combustion engine that drives a motor-generator, and has a two-stage turbocharger, for an aircraft. A control system controls the operation of the motor-generator to maintain the engine at a speed selected based on controlling the engine equivalence ratio. The control system controls an afterburner, an intercooler and an aftercooler to maximize powerplant efficiency. The afterburner also adds power to the turbochargers during high-altitude restarts. The turbochargers also include motor-generators that extract excess power from the exhaust.Type: ApplicationFiled: May 31, 2012Publication date: October 4, 2012Inventors: Alexander Nelson Brooks, James Gallagher Daley
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Patent number: 8196862Abstract: A high-altitude aircraft powerplant including an engine, a two-stage turbocharger having an intercooler and an aftercooler, a cryogenic hydrogen fuel source, and a cooling system including a hydrogen heat exchanger. Aided by a ram-air cooler that cools a coolant to a near-ambient temperature, the heat exchanger is configured to heat the hydrogen using the coolant, and to cool the coolant to a temperature well below the ambient temperature during high-altitude flight. The intercooler and aftercooler use the sub-ambient temperature coolant, as does a separate sensor. The ram-air cooler includes a front portion and a rear portion. The cooling system includes three cooling loops which respectively incorporate only the front portion, only the rear portion, and both portions of the ram-air cooler.Type: GrantFiled: September 23, 2009Date of Patent: June 12, 2012Assignee: AeroVironment Inc.Inventors: Alexander Nelson Brooks, James Gallagher Daley, Bart Dean Hibbs