Patents by Inventor Derek John Parkyn

Derek John Parkyn 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).

  • Starter motor lockout system
    Patent number: 4070585
    Abstract: An electronic lockout system for the starter motor of an internal combustion engine includes means for operating the starter motor only if the engine flywheel is stationary. The system also includes means for automatically deenergizing the starter motor when the engine achieves a predetermined rotational speed and independently of the continued operation of the starter switch.
    Type: Grant
    Filed: June 26, 1975
    Date of Patent: January 24, 1978
    Assignee: U.S. Philips Corporation
    Inventor: Derek John Parkyn
  • Automotive starter lockout system
    Patent number: 4032792
    Abstract: An electronic lockout system for the starter motor of an internal combustion engine includes means for operating the starter motor only when the engine flywheel is stationary. If the starter switch is released and quickly closed again, the system also includes circuit means by which the starter motor is reoperated immediately provided that the release time is only a few milliseconds.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: June 28, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Derek John Parkyn, Alexander Hendrich Francis Keuleman