Patents by Inventor Vijitha Weerasinghe

Vijitha Weerasinghe 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).

  • Coated bore cutting tools
    Patent number: 7922428
    Abstract: A twist drill partially coated with TiN to increase wear resistance whilst minimising the transfer of coating particles to a work piece. The drill is selectively coated on the rake face (42); the land (46) is not coated.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: April 12, 2011
    Assignee: Dormer Tools Limited
    Inventor: Vijitha Weerasinghe
  • Wear-resisting surface structure
    Publication number: 20050181174
    Abstract: A component comprising a body including a roughened contact surface comprising peaks and valleys, and a conformal coating of a coating material at the roughened surface, wherein the roughened surface has a surface roughness which is such that the valleys define voids in which coating material is entrapped during wear of the component in exposing the body, with the entrapped coating material conferring improved wear resistance.
    Type: Application
    Filed: October 12, 2004
    Publication date: August 18, 2005
    Inventors: Vijitha Weerasinghe, Roger Hibberd, Surangsee Dechjarern