Patents by Inventor Jeffrey Lehtinen
Jeffrey Lehtinen 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: 11655979Abstract: A fuel injector for a gas turbine engine of an aircraft having a fuel nozzle including a fuel swirler and/or an outer air swirler. The fuel swirler may include a manifold for receiving fuel from a fuel conduit, and a plurality of fuel passages to direct fuel from the manifold to discharge orifices that direct fuel with swirling flow. The fuel swirler may be configured to provide uniform spray while minimizing recirculation zones; reduce residence time as fuel enters the manifold; minimize flow disruptions, boundary layer growth, and/or pressure drop as fuel flows through the fuel passages; reduces coking internally of the nozzle; reduces thermal stresses; and is simple and low-cost to manufacture. The outer air swirler may include first and second outer air swirler portions with respective vanes and air passages that provide swirling air flow.Type: GrantFiled: June 15, 2022Date of Patent: May 23, 2023Assignee: Parker-Hannifin CorporationInventors: Luther Wirtz, Jeffrey Lehtinen, Adel Mansour, David Tibbs, Robert Pelletier, Jon Stockill
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Publication number: 20230071579Abstract: A fuel injector for a gas turbine engine of an aircraft having a fuel nozzle including a fuel swirler and/or an outer air swirler. The fuel swirler may include a manifold for receiving fuel from a fuel conduit, and a plurality of fuel passages to direct fuel from the manifold to discharge orifices that direct fuel with swirling flow. The fuel swirler may be configured to provide uniform spray while minimizing recirculation zones; reduce residence time as fuel enters the manifold; minimize flow disruptions, boundary layer growth, and/or pressure drop as fuel flows through the fuel passages; reduces coking internally of the nozzle; reduces thermal stresses; and is simple and low-cost to manufacture. The outer air swirler may include first and second outer air swirler portions with respective vanes and air passages that provide swirling air flow.Type: ApplicationFiled: June 15, 2022Publication date: March 9, 2023Inventors: Luther Wirtz, Jeffrey Lehtinen, Adel Mansour, David Tibbs, Robert Pelletier, Jon Stockill
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Patent number: 11391463Abstract: A fuel injector for a gas turbine engine of an aircraft having a fuel nozzle including a fuel swirler and/or an outer air swirler. The fuel swirler may include a manifold for receiving fuel from a fuel conduit, and a plurality of fuel passages to direct fuel from the manifold to discharge orifices that direct fuel with swirling flow. The fuel swirler may be configured to provide uniform spray while minimizing recirculation zones; reduce residence time as fuel enters the manifold; minimize flow disruptions, boundary layer growth, and/or pressure drop as fuel flows through the fuel passages; reduces coking internally of the nozzle; reduces thermal stresses; and is simple and low-cost to manufacture. The outer air swirler may include first and second outer air swirler portions with respective vanes and air passages that provide swirling air flow.Type: GrantFiled: January 12, 2021Date of Patent: July 19, 2022Assignee: Parker-Hannifin CorporationInventors: Luther Wirtz, Jeffrey Lehtinen, Adel Mansour, David Tibbs, Robert Pelletier, Jon Stockill
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Publication number: 20210131665Abstract: A fuel injector for a gas turbine engine of an aircraft having a fuel nozzle including a fuel swirler and/or an outer air swirler. The fuel swirler may include a manifold for receiving fuel from a fuel conduit, and a plurality of fuel passages to direct fuel from the manifold to discharge orifices that direct fuel with swirling flow. The fuel swirler may be configured to provide uniform spray while minimizing recirculation zones; reduce residence time as fuel enters the manifold; minimize flow disruptions, boundary layer growth, and/or pressure drop as fuel flows through the fuel passages; reduces coking internally of the nozzle; reduces thermal stresses; and is simple and low-cost to manufacture. The outer air swirler may include first and second outer air swirler portions with respective vanes and air passages that provide swirling air flow.Type: ApplicationFiled: January 12, 2021Publication date: May 6, 2021Inventors: Luther Wirtz, Jeffrey Lehtinen, Adel Mansour, David Tibbs, Robert Pelletier, Jon Stockill
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Patent number: 10955138Abstract: A fuel injector for a gas turbine engine of an aircraft having a fuel nozzle including a fuel swirler and/or an outer air swirler. The fuel swirler may include a manifold for receiving fuel from a fuel conduit, and a plurality of fuel passages to direct fuel from the manifold to discharge orifices that direct fuel with swirling flow. The fuel swirler may be configured to provide uniform spray while minimizing recirculation zones; reduce residence time as fuel enters the manifold; minimize flow disruptions, boundary layer growth, and/or pressure drop as fuel flows through the fuel passages; reduces coking internally of the nozzle; reduces thermal stresses; and is simple and low-cost to manufacture.Type: GrantFiled: April 23, 2018Date of Patent: March 23, 2021Assignee: Parker-Hannifin CorporationInventors: Luther Wirtz, Jeffrey Lehtinen, Adel Mansour, David Tibbs, Robert Pelletier, Jon Stockill
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Patent number: 10920984Abstract: A fuel injector for a gas turbine engine of an aircraft having a fuel nozzle including a fuel swirler and/or an outer air swirler. The fuel swirler may include a manifold for receiving fuel from a fuel conduit, and a plurality of fuel passages to direct fuel from the manifold to discharge orifices that direct fuel with swirling flow. The fuel swirler may be configured to provide uniform spray while minimizing recirculation zones; reduce residence time as fuel enters the manifold; minimize flow disruptions, boundary layer growth, and/or pressure drop as fuel flows through the fuel passages; reduces coking internally of the nozzle; reduces thermal stresses; and is simple and low-cost to manufacture.Type: GrantFiled: April 23, 2018Date of Patent: February 16, 2021Assignee: Parker-Hannifin CorporationInventors: Luther Wirtz, Jeffrey Lehtinen, Adel Mansour, David Tibbs, Robert Pelletier, Jon Stockill
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Publication number: 20180304281Abstract: A fuel injector for a gas turbine engine of an aircraft having a fuel nozzle including a fuel swirler and/or an outer air swirler. The fuel swirler may include a manifold for receiving fuel from a fuel conduit, and a plurality of fuel passages to direct fuel from the manifold to discharge orifices that direct fuel with swirling flow. The fuel swirler may be configured to provide uniform spray while minimizing recirculation zones; reduce residence time as fuel enters the manifold; minimize flow disruptions, boundary layer growth, and/or pressure drop as fuel flows through the fuel passages; reduces coking internally of the nozzle; reduces thermal stresses; and is simple and low-cost to manufacture.Type: ApplicationFiled: April 23, 2018Publication date: October 25, 2018Inventors: Luther Wirtz, Jeffrey Lehtinen, Adel Mansour, David Tibbs, Robert Pelletier, Jon Stockill
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Patent number: 8327649Abstract: Fuel injector assemblies with frictionally damped fuel supply members, including fuel feed strips. More particularly, the invention provides friction dampers and/or assemblies that frictionally damp movement of fuel supply members in at least one direction. Some of the embodiments provide a friction damper that is easily serviceable, and can be installed after final assembly of a fuel injector. Aspects of the invention are applicable to other components of fuel injectors and gas turbine engines in addition to fuel supply members.Type: GrantFiled: March 22, 2011Date of Patent: December 11, 2012Assignee: Parker-Hannifin CorporationInventors: Fady Bishara, Jeffrey Lehtinen
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Patent number: 8312727Abstract: Fuel injector assemblies with frictionally damped fuel supply members, including fuel feed strips. More particularly, the invention provides friction dampers and/or assemblies that frictionally damp movement of fuel supply members in at least one direction as a function of frequency. Accordingly, low frequency vibration can be undamped, while vibration above a prescribed frequency can be damped. Some of the embodiments provide a friction damper that is easily serviceable, and can be installed after final assembly of a fuel injector. Aspects of the invention are applicable to other components of fuel injectors and gas turbine engines in addition to fuel supply members.Type: GrantFiled: September 26, 2007Date of Patent: November 20, 2012Assignee: Parker-Hannifin CorporationInventors: Fady Bishara, Jeffrey Lehtinen
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Publication number: 20110167830Abstract: Fuel injector assemblies with frictionally damped fuel supply members, including fuel feed strips. More particularly, the invention provides friction dampers and/or assemblies that frictionally damp movement of fuel supply members in at least one direction. Some of the embodiments provide a friction damper that is easily serviceable, and can be installed after final assembly of a fuel injector. Aspects of the invention are applicable to other components of fuel injectors and gas turbine engines in addition to fuel supply members.Type: ApplicationFiled: March 22, 2011Publication date: July 14, 2011Inventors: Fady Bishara, Jeffrey Lehtinen
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Patent number: 7966819Abstract: Fuel injector assemblies with frictionally damped fuel supply members, including fuel feed strips. More particularly, the invention provides friction dampers and/or assemblies that frictionally damp movement of fuel supply members in at least one direction. Some of the embodiments provide a friction damper that is easily serviceable, and can be installed after final assembly of a fuel injector. Aspects of the invention are applicable to other components of fuel injectors and gas turbine engines in addition to fuel supply members.Type: GrantFiled: September 26, 2007Date of Patent: June 28, 2011Assignee: Parker-Hannifin CorporationInventors: Fady Bishara, Jeffrey Lehtinen
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Patent number: 7921649Abstract: A method for increasing and/or suppressing a natural frequency of a fuel injector feed strip while increasing in the axial direction the flexibility of the feed strip, without the use of additional structure or damping devices. More particularly, and by way of example, the present invention provides a fuel feed strip that is shaped in a shape corresponding to a first vibration mode (e.g., a bow shape) of a fuel feed strip of a desired shape (e.g., a straight fuel feed strip). By forming the fuel feed strip in a shape corresponding to a first vibration mode of the fuel feed strip of a desired shape, a vibration mode of the fuel feed strip is suppressed while the axial flexibility of the fuel feed strip is increased.Type: GrantFiled: July 21, 2006Date of Patent: April 12, 2011Assignee: Parker-Hannifin CorporationInventors: Jeffrey Lehtinen, Fady Bishara
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Publication number: 20090293483Abstract: Fuel injector assemblies with frictionally damped fuel supply members, including fuel feed strips. More particularly, the invention provides friction dampers and/or assemblies that frictionally damp movement of fuel supply members in at least one direction. Some of the embodiments provide a friction damper that is easily serviceable, and can be installed after final assembly of a fuel injector. Aspects of the invention are applicable to other components of fuel injectors and gas turbine engines in addition to fuel supply members.Type: ApplicationFiled: September 26, 2007Publication date: December 3, 2009Inventors: Fady Bishara, Jeffrey Lehtinen
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Publication number: 20080245901Abstract: Fuel injector assemblies with frictionally damped fuel supply members, including fuel feed strips. More particularly, the invention provides friction dampers and/or assemblies that frictionally damp movement of fuel supply members in at least one direction as a function of frequency. Accordingly, low frequency vibration can be undamped, while vibration above a prescribed frequency can be damped. Some of the embodiments provide a friction damper that is easily serviceable, and can be installed after final assembly of a fuel injector. Aspects of the invention are applicable to other components of fuel injectors and gas turbine engines in addition to fuel supply members.Type: ApplicationFiled: September 26, 2007Publication date: October 9, 2008Inventors: Fady Bishara, Jeffrey Lehtinen
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Publication number: 20070039325Abstract: A method for increasing and/or suppressing a natural frequency of a fuel injector feed strip while increasing in the axial direction the flexibility of the feed strip, without the use of additional structure or damping devices. More particularly, and by way of example, the present invention provides a fuel feed strip that is shaped in a shape corresponding to a first vibration mode (e.g., a bow shape) of a fuel feed strip of a desired shape (e.g., a straight fuel feed strip). By forming the fuel feed strip in a shape corresponding to a first vibration mode of the fuel feed strip of a desired shape, a vibration mode of the fuel feed strip is suppressed while the axial flexibility of the fuel feed strip is increased.Type: ApplicationFiled: July 21, 2006Publication date: February 22, 2007Inventors: Jeffrey Lehtinen, Fady Bishara