Patents by Inventor Walter J. Roy

Walter J. Roy 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).

  • SHUTDOWN METHODS FOR OXYGEN GENERATION SYSTEMS
    Publication number: 20240124994
    Abstract: In accordance with at least one aspect of this disclosure, a method includes flushing a cell stack for a predetermined amount of time as a function of an amount of combustible gas remaining in the cell stack. The method also includes operating a cell stack for a predetermined amount of time, then shutting down the cell stack and ceasing operation of the cell stack for a predetermined amount of time. Flushing occurs after shutting down a cell stack power supply. The method further includes restarting operation of the cell stack after flushing.
    Type: Application
    Filed: October 14, 2022
    Publication date: April 18, 2024
    Applicant: Hamilton Sundstrand Space Systems International, Inc.
    Inventors: Hailing Wu, Luke Blaskewicz, Walter T. Schmidt, Robert J. Roy, Phillip Baker, Galen W. Kulp
  • Thread cleaner with rotatable and adjustably supported brushes
    Patent number: 4014062
    Abstract: A thread cleaner for cleaning the pin end of a pipe or tubular member includes a housing with radially adjustable, rotatably mounted brush means therein for engaging the pin end of the pipe or tubular member to clean the threads on the pipe. Power means are adapted to be mounted on the housing for rotating the adjustably mounted brushes with conduit means for injecting solvent or cleaning fluid into the housing as the threads are cleaned and thereafter discharging the solvent or cleaning fluid from the housing.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: March 29, 1977
    Inventors: Thomas W. Scott, Walter J. Roy