Patents by Inventor Duncan Alexander Stuart MACDOUGALL

Duncan Alexander Stuart MACDOUGALL 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).

  • Output member for a direct impact Hopkinson pressure bar
    Patent number: 9778157
    Abstract: An output member for a Direct Impact Hopkinson pressure bar includes an elongate tube portion and a disc-shaped cap portion. The tube portion has a first end and an opposite second end, while the cap portion includes a first face and an opposite second face. A circular stub protrudes from a center of the first face, and a circular cavity is formed in the second face. Each of the stub and the cavity is concentric with the cap portion, with a diameter of the cavity being greater than a diameter of the stub. The second face of the cap portion is positioned in intimate contact with the first end of the tube portion, with the cap portion being concentric with the tube portion.
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: October 3, 2017
    Assignee: ROLLS-ROYCE plc
    Inventors: Duncan Alexander Stuart MacDougall, Kevin Anthony Brown, Matthew David Jackson, Roger White
  • OUTPUT MEMBER
    Publication number: 20160178496
    Abstract: An output member for a Direct Impact Hopkinson pressure bar includes an elongate tube portion and a disc-shaped cap portion. The tube portion has a first end and an opposite second end, while the cap portion includes a first face and an opposite second face. A circular stub protrudes from a centre of the first face, and a circular cavity is formed in the second face. Each of the stub and the cavity is concentric with the cap portion, with a diameter of the cavity being greater than a diameter of the stub. The second face of the cap portion is positioned in intimate contact with the first end of the tube portion, with the cap portion being concentric with the tube portion.
    Type: Application
    Filed: December 14, 2015
    Publication date: June 23, 2016
    Applicant: ROLLS-ROYCE plc
    Inventors: Duncan Alexander Stuart MACDOUGALL, Kevin Anthony BROWN, Matthew David JACKSON, Roger WHITE