Patents by Inventor Phillip Merrifield

Phillip Merrifield 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).

  • Double point derail switch
    Patent number: 9932054
    Abstract: A derailer for use in a railroad system, has an outside switch point that selectively overlays a running surface of a first mainline track and rises above the running surface of the first mainline track and an outside switch rail mechanically fastened to the outside switch point. The derailer also includes an inside switch rail including a second switch point that selectively lies adjacent a head of a second mainline track and terminates between the first and second mainline tracks.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: April 3, 2018
    Assignee: Progress Rail Services Corporation
    Inventors: Brian Weaver, Phillip Merrifield, Russell Hein
  • Double Point Derail Switch
    Publication number: 20170240190
    Abstract: A derailer for use in a railroad system, has an outside switch point that selectively overlays a running surface of a first mainline track and rises above the running surface of the first mainline track and an outside switch rail mechanically fastened to the outside switch point. The derailer also includes an inside switch rail including a second switch point that selectively lies adjacent a head of a second mainline track and terminates between the first and second mainline tracks.
    Type: Application
    Filed: February 19, 2016
    Publication date: August 24, 2017
    Applicant: Progress Rail Services Corporation
    Inventors: Brian Weaver, Phillip Merrifield, Russell Hein