Patents by Inventor Nam Lieu

Nam Lieu 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).

  • O.D. centerless grinding machine
    Patent number: 7828627
    Abstract: In one aspect of the present invention, an outer diameter (O.D.) centerless grinding machine for use in grinding a diamond workpiece has a grinding wheel positioned parallel to a regulating wheel which is adapted to press a cylindrical workpiece into the grinding wheel as the regulating wheel rotates. Electronic equipment may be adapted to adjust a pressure of the regulating wheel against the grinding wheel. Also, a carrier may be adapted to house the workpiece, the carrier being attached to a translation mechanism adapted to move the carrier between the wheels such that the workpiece is in contact with both wheels.
    Type: Grant
    Filed: October 16, 2009
    Date of Patent: November 9, 2010
    Inventors: David R. Hall, Italo Elqueta, Dat Lieu, Nam Lieu, Tyson J. Wilde
  • O.D. centerless grinding machine
    Patent number: 7677954
    Abstract: In one aspect of the present invention, an outer diameter (O.D.) centerless grinding machine for use in grinding a diamond workpiece has a grinding wheel positioned parallel to a regulating wheel which is adapted to press a cylindrical workpiece into the grinding wheel as the regulating wheel rotates. Electronic equipment may be adapted to adjust a pressure of the regulating wheel against the grinding wheel. Also, a carrier may be adapted to house the workpiece, the carrier being attached to a translation mechanism adapted to move the carrier between the wheels such that the workpiece is in contact with both wheels.
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: March 16, 2010
    Inventors: David R. Hall, Italo Elqueta, Dat Lieu, Nam Lieu, Tyson J. Wilde
  • O.D. Centerless Grinding Machine
    Publication number: 20100035517
    Abstract: In one aspect of the present invention, an outer diameter (O.D.) centerless grinding machine for use in grinding a diamond workpiece has a grinding wheel positioned parallel to a regulating wheel which is adapted to press a cylindrical workpiece into the grinding wheel as the regulating wheel rotates. Electronic equipment may be adapted to adjust a pressure of the regulating wheel against the grinding wheel. Also, a carrier may be adapted to house the workpiece, the carrier being attached to a translation mechanism adapted to move the carrier between the wheels such that the workpiece is in contact with both wheels.
    Type: Application
    Filed: October 16, 2009
    Publication date: February 11, 2010
    Inventors: David R. Hall, Italo Elqueta, Dat Lieu, Nam Lieu, Tyson J. Wilde
  • O.D. Centerless Grinding Machine
    Publication number: 20080293328
    Abstract: In one aspect of the present invention, an outer diameter (O.D.) centerless grinding machine for use in grinding a diamond workpiece has a grinding wheel positioned parallel to a regulating wheel which is adapted to press a cylindrical workpiece into the grinding wheel as the regulating wheel rotates. Electronic equipment may be adapted to adjust a pressure of the regulating wheel against the grinding wheel. Also, a carrier may be adapted to house the workpiece, the carrier being attached to a translation mechanism adapted to move the carrier between the wheels such that the workpiece is in contact with both wheels.
    Type: Application
    Filed: May 21, 2007
    Publication date: November 27, 2008
    Inventors: David R. Hall, Italo Elqueta, Dat Lieu, Nam Lieu, Tyson J. Wilde