Patents by Inventor Mark Eugene Liffring
Mark Eugene Liffring 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: 12319241Abstract: Apparatus and method to access external vehicle cargo carriers and cargo are disclosed for moving cargo from a vehicle's roof to the vehicle's hood and returning the cargo to the roof for storage. A particular embodiment consists of using existing vehicle external roof-rack mounts and cargo carriers to allow mobile crossbars to deliver the cargo carrier and the cargo to a position at the front of the vehicle. A self-contained control system provides locomotive force to deploy and retrieve the cargo carrier and cargo. A human interface is used to control the apparatus and includes manual checks to ensure safe use. The apparatus can be used without a control system and operated manually.Type: GrantFiled: May 31, 2024Date of Patent: June 3, 2025Assignee: Liffstre Products LLCInventors: Mark Eugene Liffring, Martin Richard Streich
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Publication number: 20240317144Abstract: Apparatus and method to access external vehicle cargo carriers and cargo are disclosed for moving cargo from a vehicle's roof to the vehicle's hood and returning the cargo to the roof for storage. A particular embodiment consists of using existing vehicle external roof-rack mounts and cargo carriers to allow mobile crossbars to deliver the cargo carrier and the cargo to a position at the front of the vehicle. A self-contained control system provides locomotive force to deploy and retrieve the cargo carrier and cargo. A human interface is used to control the apparatus and includes manual checks to ensure safe use. The apparatus can be used without a control system and operated manually.Type: ApplicationFiled: May 31, 2024Publication date: September 26, 2024Inventors: Mark Eugene Liffring, Martin Richard Streich
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Patent number: 12036953Abstract: Apparatus and method to access external vehicle cargo carriers and cargo are disclosed for moving cargo from a vehicle's roof to the vehicle's hood and returning the cargo to the roof for storage. A particular embodiment consists of using existing vehicle external roof-rack mounts and cargo carriers to allow mobile crossbars to deliver the cargo carrier and the cargo to a position at the front of the vehicle. A self-contained control system provides locomotive force to deploy and retrieve the cargo carrier and cargo. A human interface is used to control the apparatus and includes manual checks to ensure safe use. The apparatus can be used without a control system and operated manually.Type: GrantFiled: September 27, 2023Date of Patent: July 16, 2024Assignee: Liffstre Products LLCInventors: Mark Eugene Liffring, Martin Richard Streich
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Publication number: 20240101038Abstract: Apparatus and method to access external vehicle cargo carriers and cargo are disclosed for moving cargo from a vehicle's roof to the vehicle's hood and returning the cargo to the roof for storage. A particular embodiment consists of using existing vehicle external roof-rack mounts and cargo carriers to allow mobile crossbars to deliver the cargo carrier and the cargo to a position at the front of the vehicle. A self-contained control system provides locomotive force to deploy and retrieve the cargo carrier and cargo. A human interface is used to control the apparatus and includes manual checks to ensure safe use. The apparatus can be used without a control system and operated manually.Type: ApplicationFiled: September 27, 2023Publication date: March 28, 2024Inventors: Mark Eugene Liffring, Martin Richard Streich
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Patent number: 10389114Abstract: A method and apparatus for providing regulated direct current power for a direct current load on an aircraft. A regulated transformer rectifier unit on an aircraft comprises a plurality of converter modules connected in parallel between an input and an output. Each converter module in the plurality of converter modules comprises a transformer rectifier unit. The plurality of converter modules are controlled by a controller to provide regulated direct current power at the output from alternating current power provided at the input from an alternating current power source on the aircraft.Type: GrantFiled: November 25, 2014Date of Patent: August 20, 2019Assignee: The Boeing CompanyInventors: Evelyn Marie Matheson, Kamiar J. Karimi, Mehdy Barekatein, Eugene V. Solodovnik, Sheverria Antony Aikens, Mark Eugene Liffring
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Patent number: 9809321Abstract: An electrical power distribution system for converting and distributing electrical power to local loads within a vehicle is disclosed. The electrical power distribution system includes at least one generator providing high voltage AC (HVAC) power, a primary power panel for receiving the HVAC power from the generator, and a plurality of distribution conversion units located throughout the vehicle. The plurality of distribution conversion units convert the HVAC power from the primary power panel into medium voltage AC (MVAC) power and low voltage DC (LVDC) power for consumption by the local loads within the vehicle. The electrical power distribution system also includes a plurality of HVAC distribution feeder lines. Each HVAC distribution feeder line connects the primary power panel to one of the plurality of distribution conversion units.Type: GrantFiled: October 30, 2014Date of Patent: November 7, 2017Assignee: The Boeing CompanyInventors: Mark Eugene Liffring, Kamiar J. Karimi
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Patent number: 9762064Abstract: A method and apparatus for providing power stably for direct current loads. A regulated transformer rectifier unit is controlled to provide regulated direct current power for the direct current loads at an output of the regulated transformer rectifier unit from alternating current power provided by an alternating current power source to an input of the regulated transformer rectifier unit. The direct current loads comprise passive direct current loads and active direct current loads comprising active switching power supplies. The direct current loads have at least one of constant power characteristics, resistive power characteristics, inductive power characteristics, and capacitive power characteristics. A source impedance at the output of the regulated transformer rectifier unit is determined based on an aggregate load impedance of the direct current loads and stability criterion.Type: GrantFiled: November 25, 2014Date of Patent: September 12, 2017Assignee: THE BOEING COMPANYInventors: Kamiar J. Karimi, Mark Eugene Liffring, Evelyn Marie Matheson, Sheverria Antony Aikens, Eugene V. Solodovnik, Mehdy Barekatein
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Patent number: 9406462Abstract: An interconnect for transferring signals herein includes one or more signal contacts to transfer the power or data to or from an integrated truss system. An interconnect may be configured to transfer power or data between layers of the integrated truss system or within the same layer of the integrated truss system. An interconnect may be configured with one or more compression mechanisms that secure the interconnect in the integrated truss system.Type: GrantFiled: June 28, 2013Date of Patent: August 2, 2016Assignee: THE BOEING COMPANYInventors: Ty Aaby Larsen, Todd Burton Brouwer, Robert T Johnson, Mark Eugene Liffring, Mark Stephen Shander, Robert Dennis Holley, Margaret L. Douglas
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Publication number: 20160149404Abstract: A method and apparatus for providing power stably for direct current loads. A regulated transformer rectifier unit is controlled to provide regulated direct current power for the direct current loads at an output of the regulated transformer rectifier unit from alternating current power provided by an alternating current power source to an input of the regulated transformer rectifier unit. The direct current loads comprise passive direct current loads and active direct current loads comprising active switching power supplies. The direct current loads have at least one of constant power characteristics, resistive power characteristics, inductive power characteristics, and capacitive power characteristics. A source impedance at the output of the regulated transformer rectifier unit is determined based on an aggregate load impedance of the direct current loads and stability criterion.Type: ApplicationFiled: November 25, 2014Publication date: May 26, 2016Inventors: Kamiar J. Karimi, Mark Eugene Liffring, Evelyn Marie Matheson, Sheverria Antony Aikens, Eugene V. Solodovnik, Mehdy Barekatein
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Publication number: 20160144974Abstract: A method and apparatus for providing regulated direct current power for a direct current load on an aircraft. A regulated transformer rectifier unit on an aircraft comprises a plurality of converter modules connected in parallel between an input and an output. Each converter module in the plurality of converter modules comprises a transformer rectifier unit. The plurality of converter modules are controlled by a controller to provide regulated direct current power at the output from alternating current power provided at the input from an alternating current power source on the aircraft.Type: ApplicationFiled: November 25, 2014Publication date: May 26, 2016Inventors: Evelyn Marie Matheson, Kamiar J. Karimi, Mehdy Barekatein, Eugene V. Solodovnik, Sheverria Antony Aikens, Mark Eugene Liffring
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Publication number: 20160122033Abstract: An electrical power distribution system for converting and distributing electrical power to local loads within a vehicle is disclosed. The electrical power distribution system includes at least one generator providing high voltage AC (HVAC) power, a primary power panel for receiving the HVAC power from the generator, and a plurality of distribution conversion units located throughout the vehicle. The plurality of distribution conversion units convert the HVAC power from the primary power panel into medium voltage AC (MVAC) power and low voltage DC (LVDC) power for consumption by the local loads within the vehicle. The electrical power distribution system also includes a plurality of HVAC distribution feeder lines. Each HVAC distribution feeder line connects the primary power panel to one of the plurality of distribution conversion units.Type: ApplicationFiled: October 30, 2014Publication date: May 5, 2016Inventors: Mark Eugene Liffring, Kamiar J. Karimi
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Publication number: 20150004834Abstract: An interconnect for transferring signals herein includes one or more signal contacts to transfer the power or data to or from an integrated truss system. An interconnect may be configured to transfer power or data between layers of the integrated truss system or within the same layer of the integrated truss system. An interconnect may be configured with one or more compression mechanisms that secure the interconnect in the integrated truss system.Type: ApplicationFiled: June 28, 2013Publication date: January 1, 2015Inventors: Ty Aaby Larsen, Todd Burton Brouwer, Robert T. Johnson, Mark Eugene Liffring, Mark Stephen Shander, Robert Dennis Holley, Margaret L. Douglas