Patents by Inventor Y. H. Michael Pao

Y. H. Michael Pao 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 producing a high-velocity particle stream
    Patent number: 6283833
    Abstract: A method and apparatus for producing a high-velocity particle stream at low cost through multi-staged acceleration using different media in each stage, the particles are accelerated to a subsonic velocity (with respect to the velocity of sound in air) using one or more jets of gas at low cost, then further accelerated to a higher velocity using jets of water. Additionally, to enhance particle acceleration, a vortex motion is created, and the particles introduced into the fluid having vortex motion, thereby enhancing the delivery of particles to the target.
    Type: Grant
    Filed: August 16, 2000
    Date of Patent: September 4, 2001
    Assignee: Flow International Corporation
    Inventors: Y. H. Michael Pao, Peter L. Madonna, Ross T. Coogan
  • Method and apparatus for producing a high-velocity particle stream
    Patent number: 6168503
    Abstract: A method and apparatus for producing a high-velocity particle stream at low cost through multi-staged acceleration using different media in each stage, the particles are accelerated to a subsonic velocity (with respect to the velocity of sound in air) using one or more jets of gas at low cost, then further accelerated to a higher velocity using jets of water. Additionally, to enhance particle acceleration, a vortex motion is created, and the particles introduced into the fluid having vortex motion, thereby enhancing the delivery of particles to the target.
    Type: Grant
    Filed: July 9, 1998
    Date of Patent: January 2, 2001
    Assignee: Waterjet Technology, Inc.
    Inventors: Y. H. Michael Pao, Peter L. Madonna, Ross T. Coogan