Patents by Inventor Jaakko Niiranen

Jaakko Niiranen 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 for changing railway sleepers and equipment for applying the method
    Patent number: 5465666
    Abstract: A method and apparatus for changing railway sleepers is disclosed wherein lifting devices are spaced along a section of railway line to be repaired. The lifting devices simultaneously lift and separate the rails from the sleepers. Thereafter, a plough levels the ground on which new sleepers will be placed. Finally, new sleepers are inserted under the rails. The plough additionally serves to provide a foundation upon which the rails are supported, and should it be necessary, the plough can support the weight of a passing train.
    Type: Grant
    Filed: December 27, 1993
    Date of Patent: November 14, 1995
    Inventor: Jaakko Niiranen