Patents by Inventor Ragu S. Raghupathi

Ragu S. Raghupathi 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).

  • Improvements to high pressure fuel fittings
    Patent number: 8196967
    Abstract: A fitting for making a metal-to-metal fluid seal between a first conduit and a second conduit and corresponding first and second fluid passages. The first conduit has a generally spherical-shaped exterior surface, and the second conduit has a generally conical-shaped interior surface for receiving the generally spherical-shaped exterior surface of the first conduit. A nut is engaged with a threaded exterior surface of the second conduit, tightening of the nut on the threaded exterior surface urging the first and second conduits axially together to apply increasing pressure. A ring can be positioned between the nut and the first conduit, the ring providing a lower net coefficient of friction during tightening of the nut compared to direct contact between the nut and first conduit. The ring can be radially spaced from a radially facing interior surface of the nut.
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: June 12, 2012
    Assignee: Robert Bosch GmbH
    Inventors: John R. Seifert, Dewey M. Sims, Jr., Ragu S. Raghupathi
  • HIGH PRESSURE FUEL FITTINGS
    Publication number: 20100194096
    Abstract: A fitting for making a metal-to-metal fluid seal between a first conduit and a second conduit and corresponding first and second fluid passages. The first conduit has a generally spherical-shaped exterior surface, and the second conduit has a generally conical-shaped interior surface for receiving the generally spherical-shaped exterior surface of the first conduit. A nut is engaged with a threaded exterior surface of the second conduit, tightening of the nut on the threaded exterior surface urging the first and second conduits axially together to apply increasing pressure. A ring can be positioned between the nut and the first conduit, the ring providing a lower net coefficient of friction during tightening of the nut compared to direct contact between the nut and first conduit. The ring can be radially spaced from a radially facing interior surface of the nut.
    Type: Application
    Filed: February 4, 2009
    Publication date: August 5, 2010
    Applicant: Robert Bosch GmbH
    Inventors: John R. Seifert, Dewey M. Sims, JR., Ragu S. Raghupathi