Patents by Inventor Douglas E. Arnold

Douglas E. Arnold 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).

  • Composite panel insert ring and method of using the same
    Patent number: 8986491
    Abstract: Provided is a method of forming a thru-hole through a composite structure having a plurality of internal compartments. An insert ring is connected to the composite structure to create a protective layer around the periphery of a penetration formed within the composite structure. An adhesive is disposed between the composite structure and the insert ring to create a fluid-tight seal between the insert ring and the internal compartments. In this regard, the fluid-tight seal mitigates fluid flow between the internal compartments.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: March 24, 2015
    Assignee: Northrop Grumman Systems Corporation
    Inventors: Raymond L. Schumacher, Jr., William B. Louder, Douglas E. Arnold
  • Composite panel insert ring and method of using the same
    Patent number: 8409395
    Abstract: Provided is a method of forming a thru-hole through a composite structure having a plurality of internal compartments. An insert ring is connected to the composite structure to create a protective layer around the periphery of a penetration formed within the composite structure. An adhesive is disposed between the composite structure and the insert ring to create a fluid-tight seal between the insert ring and the internal compartments. In this regard, the fluid-tight seal mitigates fluid flow between the internal compartments.
    Type: Grant
    Filed: January 7, 2010
    Date of Patent: April 2, 2013
    Assignee: Northrop Grumman Corporation
    Inventors: Raymond L. Schumacher, Jr., William B. Louder, Douglas E. Arnold
  • Composite Panel Insert Ring and Method of Using the Same
    Publication number: 20110162165
    Abstract: Provided is a method of forming a thru-hole through a composite structure having a plurality of internal compartments. An insert ring is connected to the composite structure to create a protective layer around the periphery of a penetration formed within the composite structure. An adhesive is disposed between the composite structure and the insert ring to create a fluid-tight seal between the insert ring and the internal compartments. In this regard, the fluid-tight seal mitigates fluid flow between the internal compartments.
    Type: Application
    Filed: January 7, 2010
    Publication date: July 7, 2011
    Inventors: Raymond L. Schumacher, JR., William B. Louder, Douglas E. Arnold