Patents by Inventor Ahmed Alnega

Ahmed Alnega 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).

  • Turbocharger with sliding piston, and having vanes and leakage dams
    Patent number: 8070425
    Abstract: A turbocharger having a sliding piston for regulating exhaust gas flow into the turbine wheel includes a set of first vanes mounted on a fixed first wall of the turbine nozzle and projecting axially toward an opposite second wall of the nozzle, and/or a set of second vanes mounted on the end of the piston and projecting in an opposite axial direction toward the first wall of the nozzle. For the/each set of vanes, there are leakage dams formed on the wall that is adjacent the vane tips when the piston is closed. The leakage dams are closely adjacent the vane tips and discourage exhaust gas from leaking in a generally radial direction past the vane tips as the piston just begins to open from its fully closed position.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: December 6, 2011
    Assignee: Honeywell International Inc.
    Inventors: Quentin Roberts, Ahmed Alnega
  • TURBOCHARGER WITH SLIDING PISTON, AND HAVING VANES AND LEAKAGE DAMS
    Publication number: 20090246003
    Abstract: A turbocharger having a sliding piston for regulating exhaust gas flow into the turbine wheel includes a set of first vanes mounted on a fixed first wall of the turbine nozzle and projecting axially toward an opposite second wall of the nozzle, and/or a set of second vanes mounted on the end of the piston and projecting in an opposite axial direction toward the first wall of the nozzle. For the/each set of vanes, there are leakage dams formed on the wall that is adjacent the vane tips when the piston is closed. The leakage dams are closely adjacent the vane tips and discourage exhaust gas from leaking in a generally radial direction past the vane tips as the piston just begins to open from its fully closed position.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 1, 2009
    Inventors: Quentin Roberts, Ahmed Alnega