Patents by Inventor Robert A. Erwin

Robert A. Erwin 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).

  • Automatic axle lift system
    Patent number: 12623739
    Abstract: An automatic axle lift system including a first sensor circuit configured to detect the presence of a brake signal and a turn signal and, in response, to generate a lift command signal that lifts an axle or a set of axles of a vehicle. The automatic axle lift system also includes a second sensor circuit that detects the lift command signal and, in response, generates a caution light signal. The automatic axle lift system includes a third sensor circuit that detects the lift command signal and, in response, latches the second sensor circuit to maintain the lift command signal.
    Type: Grant
    Filed: October 7, 2024
    Date of Patent: May 12, 2026
    Inventors: Robert A. Erwin, Paul Lovejoy
  • AUTOMATIC AXLE LIFT SYSTEM
    Publication number: 20260097819
    Abstract: An automatic axle lift system including a first sensor circuit configured to detect the presence of a brake signal and a turn signal and, in response, to generate a lift command signal that lifts an axle or a set of axles of a vehicle. The automatic axle lift system also includes a second sensor circuit that detects the lift command signal and, in response, generates a caution light signal. The automatic axle lift system includes a third sensor circuit that detects the lift command signal and, in response, latches the second sensor circuit to maintain the lift command signal.
    Type: Application
    Filed: October 7, 2024
    Publication date: April 9, 2026
    Applicant: 4E Ltd.
    Inventors: Robert A. Erwin, Paul Lovejoy