Patents by Inventor Joshua D. Costell

Joshua D. Costell 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).

  • Method and apparatus for electronically pressure sealing and leak testing an idle centrifugal chiller system
    Patent number: 4864829
    Abstract: A method and apparatus for electronically pressure sealing and leak testing an idle centrifugal chiller system wherein a small positive differential is maintained between the internal refrigerant vessel pressure of the chiller system and the ambient atmosphere. This differential pressure is maintained by selectively applying heat to the refrigerant.
    Type: Grant
    Filed: January 11, 1989
    Date of Patent: September 12, 1989
    Assignee: Mechanical Ingenuity Corp.
    Inventors: Peter J. Manning, Joshua D. Costell, Howard L. Beckerman