Patents by Inventor Randy R. McDonnell

Randy R. McDonnell 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).

  • Intake air boost system for two-cycle engine having roots blowers
    Patent number: 10690045
    Abstract: An air boost system for a two-cycle engine, such as an EMD engine, which operates with one or more roots blowers, or for similar engines that use gear-driven roots blowers or centrifugal blowers. At least one of the roots blowers is equipped with a variable transmission, which allows airflow into the engine to be varied in accordance with load or other engine operating conditions.
    Type: Grant
    Filed: March 5, 2017
    Date of Patent: June 23, 2020
    Assignee: Southwest Research Institute
    Inventors: John C. Hedrick, Steven G. Fritz, Randy R. McDonnell
  • Intake Air Boost System For Two-Cycle Engine Having Roots Blowers
    Publication number: 20180252153
    Abstract: An air boost system for a two-cycle engine, such as an EMD engine, which operates with one or more roots blowers, or for similar engines that use gear-driven roots blowers or centrifugal blowers. At least one of the roots blowers is equipped with a variable transmission, which allows airflow into the engine to be varied in accordance with load or other engine operating conditions.
    Type: Application
    Filed: March 5, 2017
    Publication date: September 6, 2018
    Inventors: John C. Hedrick, Steven G. Fritz, Randy R. McDonnell