Patents by Inventor Andrew Walz
Andrew Walz 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: 11591964Abstract: An oil cooling system for an aircraft engine, a bypass valve and an associate method of cooling aircraft engine oil are provided. The oil cooling system includes a heat exchanger having an inlet and an outlet. The inlet is in fluid communication with a first oil conduit to receive a first oil flow from the first oil conduit. The heat exchanger facilitates heat transfer from the first oil flow to another fluid. A flow restrictor defining a constriction is operatively disposed to restrict the first oil flow through the heat exchanger. A second oil conduit receives the first oil flow from the heat exchanger. A bypass oil passage provides fluid communication between the first oil conduit and the second oil conduit to allow a second oil flow received from the first oil conduit to flow to the second oil conduit and bypass the heat exchanger.Type: GrantFiled: June 17, 2021Date of Patent: February 28, 2023Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Andrew Walz, Ritchie Domingo
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Publication number: 20220403779Abstract: An oil cooling system for an aircraft engine, a bypass valve and an associate method of cooling aircraft engine oil are provided. The oil cooling system includes a heat exchanger having an inlet and an outlet. The inlet is in fluid communication with a first oil conduit to receive a first oil flow from the first oil conduit. The heat exchanger facilitates heat transfer from the first oil flow to another fluid. A flow restrictor defining a constriction is operatively disposed to restrict the first oil flow through the heat exchanger. A second oil conduit receives the first oil flow from the heat exchanger. A bypass oil passage provides fluid communication between the first oil conduit and the second oil conduit to allow a second oil flow received from the first oil conduit to flow to the second oil conduit and bypass the heat exchanger.Type: ApplicationFiled: June 17, 2021Publication date: December 22, 2022Inventors: Andrew WALZ, Ritchie DOMINGO
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Patent number: 11067004Abstract: A fluid system for a gas turbine engine includes a first supply line, a hydraulic accessory actuable by a fluid, and a second supply line fluidly connected the hydraulic accessory and to the first supply line upstream of the component. An accumulator is fluidly connected to the second supply line upstream of the hydraulic accessory. The accumulator is operable to fill a reservoir with the fluid from the first supply line via the second supply line, and to deliver the fluid to the hydraulic accessory via the second supply line. The first supply line may be a fuel or lubricant main supply line of the engine. A method of actuating a hydraulic accessory is also disclosed.Type: GrantFiled: March 27, 2018Date of Patent: July 20, 2021Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Nicholas Ngoly, Simon Hartropp, Andrew Walz, Roger Lachance
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Publication number: 20200309160Abstract: Methods and systems for controlling a pneumatic starter air valve of a gas turbine engine are described herein. The starter air valve is controlled in a first mode of operation by actuating a first solenoid of the starter air valve with a steady-state input signal. Passage of the steady-state input signal to a second solenoid of the starter air valve is allowed, to actuate the second solenoid and enable pressure regulation of the starter air valve. The starter air valve is controlled in a second mode of operation by actuating the first solenoid with a pulse-width modulation input signal. Passage of the pulse-width modulation input signal to the second solenoid is prevented, to disable the pressure regulation in the second mode of operation.Type: ApplicationFiled: March 27, 2019Publication date: October 1, 2020Inventors: Andrew WALZ, Mehmet TANJU
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Patent number: 10767666Abstract: Methods and systems for controlling a pneumatic starter air valve of a gas turbine engine are described herein. The starter air valve is controlled in a first mode of operation by actuating a first solenoid of the starter air valve with a steady-state input signal. Passage of the steady-state input signal to a second solenoid of the starter air valve is allowed, to actuate the second solenoid and enable pressure regulation of the starter air valve. The starter air valve is controlled in a second mode of operation by actuating the first solenoid with a pulse-width modulation input signal. Passage of the pulse-width modulation input signal to the second solenoid is prevented, to disable the pressure regulation in the second mode of operation.Type: GrantFiled: March 27, 2019Date of Patent: September 8, 2020Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Andrew Walz, Mehmet Tanju
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Patent number: 10443503Abstract: A gas turbine fuel system including a main fuel line providing fuel flow from a fuel tank to a combustor, and at least one pump, including an ejector pump, pumping fuel from the fuel tank to the combustor via a fuel metering unit. The fuel metering unit directs a portion of the fuel into a motive flow line which returns a portion of the fuel to the ejector pump. First and second heat exchangers are disposed in serial flow communication within the main fuel line between the pump and the fuel metering unit. The first heat exchanger is a fuel-to-fuel heat exchanger.Type: GrantFiled: March 27, 2015Date of Patent: October 15, 2019Assignee: PRATT & WHITNEY CANADA CORP.Inventors: Daniel Alecu, Steven Strecker, Andrew Walz
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Publication number: 20190301479Abstract: A fluid system for a gas turbine engine includes a first supply line, a hydraulic accessory actuable by a fluid, and a second supply line fluidly connected the hydraulic accessory and to the first supply line upstream of the component. An accumulator is fluidly connected to the second supply line upstream of the hydraulic accessory. The accumulator is operable to fill a reservoir with the fluid from the first supply line via the second supply line, and to deliver the fluid to the hydraulic accessory via the second supply line. The first supply line may be a fuel or lubricant main supply line of the engine. A method of actuating a hydraulic accessory is also disclosed.Type: ApplicationFiled: March 27, 2018Publication date: October 3, 2019Inventors: Nicholas NGOLY, Simon HARTROPP, Andrew WALZ, Roger LACHANCE
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Publication number: 20160281656Abstract: A fuel system for a gas turbine engine having a combustor that is fed fuel from a fuel tank includes a main fuel line providing fuel flow from the fuel tank to the combustor, at least one pump pumping fuel from the fuel tank to the combustor via a fuel metering unit. The at least one pump includes an ejector pump. The fuel metering unit directs a portion of the fuel into a motive flow line. The motive flow line provides return of the portion of the fuel to the ejector pump. A first heat exchanger and a second heat exchanger are disposed in serial flow communication within the main fuel line between the at least one pump and the fuel metering unit. The second heat exchanger is downstream from the first heat exchanger. The first heat exchanger is a fuel-to-fuel heat exchanger providing heat transfer communication between the main fuel line and the motive flow line. A method of heating fuel in a fuel system of a gas turbine engine is also presented.Type: ApplicationFiled: March 27, 2015Publication date: September 29, 2016Inventors: Daniel ALECU, Steven STRECKER, Andrew WALZ
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Patent number: 7408775Abstract: A rack system is disclosed that includes a plurality of electrical modules (48), a frame (10) supporting the plurality of electrical modules (48) that includes a plurality of frame members (16, 18, 20, 22, 26, 38, 39, 40) and a plurality of locations (52) for supportably receiving one of the plurality of electrical modules (48), a first frame member (16) of the plurality of frame members including a first bore (68) for transporting a liquid along a length of the first frame member (16) and having a plurality of openings extending through the first frame member (16) between a sidewall of the bore (68) and an exterior surface of the frame member (68), and a plurality of first connectors (64) mounted in the plurality of openings, wherein one of the plurality of electrical modules (48) includes a cooling liquid pathway (84) and at least one second connector (86) providing access to the cooling liquid pathway (84) detachably engaging the first connector (64) to provide fluid communication between the first bore (6Type: GrantFiled: October 19, 2004Date of Patent: August 5, 2008Assignee: Honeywell International Inc.Inventors: Andrew A. Walz, Donald A. Tegart
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Publication number: 20070043206Abstract: A process for making water-soluble phosphonooxymethyl ethers of hindered alcohol and phenol containing pharmaceuticals, such as camptothecin, propofol, etoposide, Vitamin E and Cyclosporin A. In particular, the process for preparing water-soluble phosphonooxymethyl derivatives comprises the steps of: R—OH represents an alcohol- or phenol-containing drug, n represents an integer of 1 or 2, R1 is hydrogen, an alkali metal ion, or a pharmaceutically acceptable cation, and R2 is hydrogen, an alkali metal ion, or a pharmaceutically acceptable cation.Type: ApplicationFiled: October 26, 2006Publication date: February 22, 2007Applicant: MGI GP, Inc.Inventors: George Bonneville, Greg Delahanty, Andrew Walz
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Patent number: 7164584Abstract: An electromagnetic device (10) includes a core (12) having first and second arms (16, 18) connected by at least one body (14), a first winding (40) having multiple turns (41a, 41b) on the first arm (16) and a second winding (42) having multiple turns (43a, 43b) on the second arm (18), and a heatsink (50) having a first plurality of U-shaped heatsink elements (52) each including first and second legs (56, 58) aligned with the first and second arms (16, 18) and having a first thickness connected by a base (54) having a second thickness greater than the first thickness, the base (54) of each of the plurality of elements (52) being in contact with the base (54) of an adjacent heatsink element (52).Type: GrantFiled: October 19, 2004Date of Patent: January 16, 2007Assignee: Honeywell International Inc.Inventor: Andrew A. Walz
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Publication number: 20060082970Abstract: A rack system is disclosed that includes a plurality of electrical modules (48), a frame (10) supporting the plurality of electrical modules (48) that includes a plurality of frame members (16, 18, 20, 22, 26, 38, 39, 40) and a plurality of locations (52) for supportably receiving one of the plurality of electrical modules (48), a first frame member (16) of the plurality of frame members including a first bore (68) for transporting a liquid along a length of the first frame member (16) and having a plurality of openings extending through the first frame member (16) between a sidewall of the bore (68) and an exterior surface of the frame member (68), and a plurality of first connectors (64) mounted in the plurality of openings, wherein one of the plurality of electrical modules (48) includes a cooling liquid pathway (84) and at least one second connector (86) providing access to the cooling liquid pathway (84) detachably engaging the first connector (64) to provide fluid communication between the first bore (6Type: ApplicationFiled: October 19, 2004Publication date: April 20, 2006Inventors: Andrew Walz, Donald Tegart
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Publication number: 20060082945Abstract: An electromagnetic device (10) includes a core (12) having first and second arms (16, 18) connected by at least one body (14), a first winding (40) having multiple turns (41a, 41b) on the first arm (16) and a second winding (42) having multiple turns (43a, 43b) on the second arm (18), and a heatsink (50) having a first plurality of U-shaped heatsink elements (52) each including first and second legs (56, 58) aligned with the first and second arms (16, 18) and having a first thickness connected by a base (54) having a second thickness greater than the first thickness, the base (54) of each of the plurality of elements (52) being in contact with the base (54) of an adjacent heatsink element (52).Type: ApplicationFiled: October 19, 2004Publication date: April 20, 2006Inventor: Andrew Walz
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Publication number: 20050124787Abstract: A process for making water-soluble phosphonooxymethyl ethers of hindered alcohol and phenol containing pharmaceuticals, such as camptothecin, propofol, etoposide, Vitamin E and Cyclosporin A. In particular, the process for preparing water-soluble phosphonooxymethyl derivatives comprises the steps of Formula (i) and Formula (ii); R—OH represents an alcohol- or phenol-containing drug, n represents an integer of 1 or 2, R1 is hydrogen, an alkali metal ion, or a pharmaceutically acceptable cation, and R2 is hydrogen, an alkali metal ion, or a pharmaceutically acceptable cation.Type: ApplicationFiled: December 20, 2002Publication date: June 9, 2005Inventors: George Bonneville, Greg Delahanty, Andrew Walz