Patents by Inventor Samuel David Charles Parfitt

Samuel David Charles Parfitt 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).

  • Lock for a tamper resistant assembly
    Patent number: 11124991
    Abstract: A tamper-resistant lock assembly comprising a plate having a slot for receiving a key, the slot extending through the plate from an opening in a front face thereof to an exit in an opposing rear face thereof, the opening having a first profile and the exit having a second, different profile, the key comprising a shaft having a bit extending therefrom, the bit being formed of a shape memory material and being pre-configured such that its cross-sectional shape in its temporary form matches the first profile and the bit can be inserted through the slot via the opening and, upon application of a predetermined external stimulus, returns to a permanent form in which its cross-sectional shape matches the second profile and the bit can be retracted from the slot via the exit.
    Type: Grant
    Filed: July 10, 2017
    Date of Patent: September 21, 2021
    Assignee: BAE Systems plc
    Inventors: Samuel David Charles Parfitt, Richard John Harper, Thomas Mark Plucinski
  • A LOCK FOR A TAMPER RESISTANT ASSEMBLY
    Publication number: 20200032552
    Abstract: A tamper-resistant lock assembly comprising a plate having a slot for receiving a key, the slot extending through the plate from an opening in a front face thereof to an exit in an opposing rear face thereof, the opening having a first profile and the exit having a second, different profile, the key comprising a shaft having a bit extending therefrom, the bit being formed of a shape memory material and being pre-configured such that its cross-sectional shape in its temporary form matches the first profile and the bit can be inserted through the slot via the opening and, upon application of a predetermined external stimulus, returns to a permanent form in which its cross-sectional shape matches the second profile and the bit can be retracted from the slot via the exit.
    Type: Application
    Filed: July 10, 2017
    Publication date: January 30, 2020
    Applicant: BAE Systems plc
    Inventors: Samuel David Charles Parfitt, Richard John Harper, Thomas Mark Plucinski