Patents by Inventor Ngo Pham-Phu

Ngo Pham-Phu 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).

  • Channel for feeding water to a vertical-axis Kaplan water turbine
    Patent number: 4764087
    Abstract: This invention relates to a channel for supplying water to a vertical-axis Kaplan water turbine, wherein the vertical side walls thereof are oriented in convergent manner in order that, at turbine level, they join an end face of rounded form, of which the radius of curvature is slightly greater than the radius of the guide blades located above the turbine and the sleeve of the turbine shaft and/or an inclined fixed wall downstream of the turbine are provided, for preventing the development of suction eddies downstream of the sleeve of the turbine shaft.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: August 16, 1988
    Assignee: Societe Neyrpic
    Inventor: Ngo Pham-Phu