Patents by Inventor David R. C. Cannal

David R. C. Cannal 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).

  • SOUND ABSORBING DUCT FOR ENVIRONMENTAL CONTROL SYSTEM
    Publication number: 20230358433
    Abstract: A duct includes a rigid air-permeable tube of composite material. The duct also includes a layer of insulation coupled to an exterior surface of the rigid air-permeable tube. The duct further includes a non-rigid insulation layer in contact with the layer of insulation. The non-rigid insulation layer forms an air-impermeable duct wall.
    Type: Application
    Filed: July 3, 2023
    Publication date: November 9, 2023
    Applicant: THE BOEING COMPANY
    Inventors: Bryce A. Vandyke, John Erik West, Douglas D. Maben, Andrew K. Fung, David R.C. Cannal
  • Sound absorbing duct for environmental control system
    Patent number: 11739973
    Abstract: A duct includes a rigid air-permeable tube of composite material. The duct also includes a layer of insulation coupled to an exterior surface of the rigid air-permeable tube. The duct further includes a non-rigid insulation layer in contact with the layer of insulation. The non-rigid insulation layer forms an air-impermeable duct wall.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: August 29, 2023
    Assignee: THE BOEING COMPANY
    Inventors: Bryce A. Vandyke, John Erik West, Douglas D. Maben, Andrew K. Fung, David R. C. Cannal
  • Sound absorbing duct with foam-filled honeycomb core for environmental control system
    Patent number: 11712872
    Abstract: A duct includes a foam-filled honeycomb core structure having a tubular shape. The duct further includes an air-impermeable duct wall coupled to an exterior surface of the foam-filled honeycomb core structure.
    Type: Grant
    Filed: August 20, 2018
    Date of Patent: August 1, 2023
    Assignee: THE BOEING COMPANY
    Inventors: Douglas D. Maben, Bryce A. Vandyke, Mark M. Gmerek, David R. C. Cannal
  • SOUND ABSORBING DUCT FOR ENVIRONMENTAL CONTROL SYSTEM
    Publication number: 20200056803
    Abstract: A duct includes a rigid air-permeable tube of composite material. The duct also includes a layer of insulation coupled to an exterior surface of the rigid air-permeable tube. The duct further includes a non-rigid insulation layer in contact with the layer of insulation. The non-rigid insulation layer forms an air-impermeable duct wall.
    Type: Application
    Filed: August 20, 2018
    Publication date: February 20, 2020
    Inventors: Bryce A. Vandyke, John Erik West, Douglas D. Maben, Andrew K. Fung, David R.C. Cannal
  • SOUND ABSORBING DUCT WITH FOAM-FILLED HONEYCOMB CORE FOR ENVIRONMENTAL CONTROL SYSTEM
    Publication number: 20200056727
    Abstract: A duct includes a foam-filled honeycomb core structure having a tubular shape. The duct further includes an air-impermeable duct wall coupled to an exterior surface of the foam-filled honeycomb core structure.
    Type: Application
    Filed: August 20, 2018
    Publication date: February 20, 2020
    Inventors: Douglas D. Maben, Bryce A. Vandyke, Mark M. Gmerek, David R. C. Cannal