Patents by Inventor Constantin Dumitru

Constantin Dumitru 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).

  • Check ball valve assembly with check ball guide
    Patent number: 8256444
    Abstract: A check ball valve assembly is used to regulate fluid flow from two separate fluid sources to a single fluid outlet. The assembly utilizes a single check ball alternating between two check ball seats in two separate fluid passages. A check ball guide is installed at the intersection of the separate fluid passages and deflects the check ball from the pressurized passage to the non-pressurized passage to prevent backflow into the fluid source.
    Type: Grant
    Filed: November 6, 2009
    Date of Patent: September 4, 2012
    Assignee: GM Global Technology Operations LLC
    Inventors: Kelly Pietras, Constantin Dumitru
  • CHECK BALL VALVE ASSEMBLY WITH CHECK BALL GUIDE
    Publication number: 20110108141
    Abstract: A check ball valve assembly is used to regulate fluid flow from two separate fluid sources to a single fluid outlet. The assembly utilizes a single check ball alternating between two check ball seats in two separate fluid passages. A check ball guide is installed at the intersection of the separate fluid passages and deflects the check ball from the pressurized passage to the non-pressurized passage to prevent backflow into the fluid source.
    Type: Application
    Filed: November 6, 2009
    Publication date: May 12, 2011
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Kelly Pietras, Constantin Dumitru