Patents by Inventor David Mahaffey

David Mahaffey 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).

  • Systems and methods for determining efficiency of friction welding processes
    Patent number: 10799979
    Abstract: Systems and methods for calculating efficiency of a rotary friction welding process are described herein. An example method can include measuring kinetic energy transferred from a welding machine to an interface of a welded joint, and calculating an efficiency of a rotary friction welding process based on the measured kinetic energy. For example, a workpiece torque experienced by a sample can be measured, and an energy associated with the workpiece torque can be calculated. The efficiency of the rotary friction welding process can then be calculated using the energy associated with the workpiece torque.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: October 13, 2020
    Assignees: Ohio State Innovation Foundation, Government of the United States as Represented by the Secretary of the Air Force
    Inventors: Wei Zhang, David Mahaffey, Sheldon Semiatin, Oleg Senkov, Daniel Tung
  • SYSTEMS AND METHODS FOR DETERMINING EFFICIENCY OF FRICTION WELDING PROCESSES
    Publication number: 20180147656
    Abstract: Systems and methods for calculating efficiency of a rotary friction welding process are described herein. An example method can include measuring kinetic energy transferred from a welding machine to an interface of a welded joint, and calculating an efficiency of a rotary friction welding process based on the measured kinetic energy. For example, a workpiece torque experienced by a sample can be measured, and an energy associated with the workpiece torque can be calculated. The efficiency of the rotary friction welding process can then be calculated using the energy associated with the workpiece torque.
    Type: Application
    Filed: November 28, 2017
    Publication date: May 31, 2018
    Inventors: Wei Zhang, David Mahaffey, Sheldon Semiatin, Oleg Senkov, Daniel Tung
  • System and method for reducing the vulnerability of a computer network to virus threats
    Patent number: 7571483
    Abstract: A method for reducing vulnerability of a computer network to a detected virus threat includes receiving an identifier of a network device detected as a source of virus activity. The method also includes relating the identifier to a predetermined account of the detected device and then automatically disabling the device account. Accordingly, the detected device is isolated from the network to prevent infection of the network by the detected device.
    Type: Grant
    Filed: August 25, 2005
    Date of Patent: August 4, 2009
    Assignee: Lockheed Martin Corporation
    Inventors: Jeff P. Bascle, Stephen M. Blair, Jr., Paul David Mahaffey, Jr., Jason J. Quest