Patents by Inventor Sriwickrama Prithiviraj Harasgama

Sriwickrama Prithiviraj Harasgama 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).

  • Platform cooling in turbomachines
    Patent number: 6309175
    Abstract: The arrangements according to the invention and the method according to the invention serve to cool platforms in turbomachines. To this end, in two platforms 210, 210′ arranged directly next to one another and having a separating gap 211 running between the platforms, at least one cooling passage 230 is arranged along the separating gap 211. In this case, the cooling passage 230 runs approximately parallel to the surface of the platforms 210, 210′. The cooling passage 230 is preferably designed as a slit-like recess in at least one side wall adjacent to the separating gap 211. If blades 220, 220′ are arranged on the platforms 210, 210′, the cooling passage 230 expediently runs approximately centrally between the blades. In addition, the cooling passage 230 preferably has a course similar to the course of the blade profile.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: October 30, 2001
    Assignee: ABB Alstom Power (Schweiz) AG
    Inventors: Hartmut Hahnle, Kenneth Hall, Sriwickrama Prithiviraj Harasgama, Konrad Vogeler