Patents by Inventor Randy McCall

Randy McCall 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).

  • Patent number: 11673475
    Abstract: A direct current traction motor control system includes plural motors of with each of the motors configured to be coupled with a different axle of a vehicle and to rotate the axle to propel the vehicle. The motors are coupled with a DC bus and configured to receive DC via the DC bus to power the motors. The system also includes plural switch assemblies with each of the switch assemblies having an H-bridge circuit coupled with a different motor of the motors to control rotation of the motor. The system includes a controller configured to communicate control signals to the switch assemblies to individually control the H-bridge circuits to control one or more of torques output by the motors or rotation directions of the motors.
    Type: Grant
    Filed: September 24, 2021
    Date of Patent: June 13, 2023
    Assignee: Transportation IP Holdings, LLC
    Inventor: Randy McCall
  • Publication number: 20220176828
    Abstract: A direct current traction motor control system includes plural motors of with each of the motors configured to be coupled with a different axle of a vehicle and to rotate the axle to propel the vehicle. The motors are coupled with a DC bus and configured to receive DC via the DC bus to power the motors. The system also includes plural switch assemblies with each of the switch assemblies having an H-bridge circuit coupled with a different motor of the motors to control rotation of the motor. The system includes a controller configured to communicate control signals to the switch assemblies to individually control the H-bridge circuits to control one or more of torques output by the motors or rotation directions of the motors.
    Type: Application
    Filed: September 24, 2021
    Publication date: June 9, 2022
    Applicant: Transportation IP Holdings, LLC
    Inventor: Randy McCall
  • Patent number: D357503
    Type: Grant
    Filed: January 12, 1994
    Date of Patent: April 18, 1995
    Inventors: Michael J. Perry, Randy McCall