Patents by Inventor David W. Leadingham

David W. Leadingham 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).

  • Patent number: 10498248
    Abstract: A dual function solid state power converter operable from a three phase AC input current simultaneously provides; an AC or DC output current on an aircraft power cable which extends from a stowed position to provide ground power to a parked aircraft, and a low voltage DC current on a battery charging power cable which extends from a stowed position to charge batteries in nearby service vehicles. The power converter includes an AC to DC converter which converts the AC input current to a DC current on an internal DC bus, a DC to AC converter which converts the DC bus current to an AC current at a higher voltage and frequency, or a DC to DC converter which converts the DC bus current to a lower voltage DC, for supplying ground power by means of a connecting cable to a parked aircraft, and a DC to DC converter for converting the DC bus current to a lower voltage battery charging current on the battery charging cable.
    Type: Grant
    Filed: January 18, 2018
    Date of Patent: December 3, 2019
    Assignee: ITW, Inc.
    Inventor: David W Leadingham
  • Publication number: 20180159438
    Abstract: A dual function solid state power converter operable from a three phase AC input current simultaneously provides; an AC or DC output current on an aircraft power cable which extends from a stowed position to provide ground power to a parked aircraft, and a low voltage DC current on a battery charging power cable which extends from a stowed position to charge batteries in nearby service vehicles. The power converter includes an AC to DC converter which converts the AC input current to a DC current on an internal DC bus, a DC to AC converter which converts the DC bus current to an AC current at a higher voltage and frequency, or a DC to DC converter which converts the DC bus current to a lower voltage DC, for supplying ground power by means of a connecting cable to a parked aircraft, and a DC to DC converter for converting the DC bus current to a lower voltage battery charging current on the battery charging cable.
    Type: Application
    Filed: January 18, 2018
    Publication date: June 7, 2018
    Inventor: David W. Leadingham
  • Patent number: 7461516
    Abstract: A modular aircraft support system is disclosed. In one embodiment, the modular system includes a mobile cart and an air conditioning system configured to provide conditioned air to an aircraft. The embodiment also includes a modular power converter for converting input power to a desired output power, which can be input to a supported aircraft. The cart is configured to receive a plurality of different interchangeable power converters, such as a 115 VAC, 400 Hz power converter or a 270 VDC power converter. In some embodiments, a variety of other components are also coupled to the mobile cart, including a local generator and engine. The generator may supply power to the air conditioning system and to the converter.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: December 9, 2008
    Assignee: Illinois Tool Works Inc.
    Inventors: David W. Leadingham, Steve Bivens, Richard L. Hansen
  • Publication number: 20080250803
    Abstract: A modular aircraft support system is disclosed. In one embodiment, the modular system includes a mobile cart and an air conditioning system configured to provide conditioned air to an aircraft. The embodiment also includes a modular power converter for converting input power to a desired output power, which can be input to a supported aircraft. The cart is configured to receive a plurality of different interchangeable power converters, such as a 115 VAC, 400 Hz power converter or a 270 VDC power converter. In some embodiments, a variety of other components are also coupled to the mobile cart, including a local generator and engine. The generator may supply power to the air conditioning system and to the converter.
    Type: Application
    Filed: November 22, 2005
    Publication date: October 16, 2008
    Inventors: David W. Leadingham, Steve Bivens, Richard L. Hansen