Patents by Inventor David W. Shahan

David W. Shahan 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).

  • HINGELESS, LARGE-THROW NEGATIVE STIFFNESS STRUCTURE
    Publication number: 20180080521
    Abstract: A negative stiffness structure for vibration isolation, shock mitigation, and/or signal processing includes a flexible tensile member and a curved compressive member. A first end of the tensile member is attached to a first structure. A first end of the curved compressive member is coupled to a first structure and a second end of the curved compressive member is coupled to a second end of the flexible tensile member. A length of the tensile member is greater than a length of the compressive member. A tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip. The negative stiffness mechanical response acts in a direction orthogonal to the length of the tensile member.
    Type: Application
    Filed: November 27, 2017
    Publication date: March 22, 2018
    Inventors: Christopher B. Churchill, David W. Shahan, Geoffrey P. McKnight, Guillermo A. Herrera
  • Hingeless, large-throw negative stiffness structure
    Patent number: 9897161
    Abstract: A negative stiffness structure for vibration isolation, shock mitigation, and/or signal processing includes a flexible tensile member and a curved compressive member. A first end of the tensile member is attached to a first structure. A first end of the curved compressive member is coupled to a first structure and a second end of the curved compressive member is coupled to a second end of the flexible tensile member. A length of the tensile member is greater than a length of the compressive member. A tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip. The negative stiffness mechanical response acts in a direction orthogonal to the length of the tensile member.
    Type: Grant
    Filed: December 9, 2014
    Date of Patent: February 20, 2018
    Assignee: HRL Laboratories, LLC
    Inventors: Christopher B. Churchill, David W. Shahan, Geoffrey P. McKnight, Guillermo A. Herrera
  • HINGELESS, LARGE-THROW NEGATIVE STIFFNESS STRUCTURE
    Publication number: 20160348752
    Abstract: A negative stiffness structure for vibration isolation, shock mitigation, and/or signal processing includes a flexible tensile member and a curved compressive member. A first end of the tensile member is attached to a first structure. A first end of the curved compressive member is coupled to a first structure and a second end of the curved compressive member is coupled to a second end of the flexible tensile member. A length of the tensile member is greater than a length of the compressive member. A tip of the negative stiffness structure is configured to exhibit a negative stiffness mechanical response to a load applied to the tip. The negative stiffness mechanical response acts in a direction orthogonal to the length of the tensile member.
    Type: Application
    Filed: December 9, 2014
    Publication date: December 1, 2016
    Inventors: Christopher B. Churchill, David W. Shahan, Geoffrey P. McKnight, Guillermo A. Herrera