Patents by Inventor Piia Gustafsson

Piia Gustafsson 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).

  • Plate heat exchanger and method for constructing multiple passes in the plate heat exchanger
    Patent number: 10066874
    Abstract: The invention relates to a plate heat exchanger and a method for constructing multiple passes in the plate heat exchanger. A plate heat exchanger (1) according to the invention comprises at least one stopper plate (7) arranged between the outer surface of the plate pack (6) and the shell (2) of the outer casing of the heat exchanger for arranging multiple passes for the second heat exchange medium to the heat exchanger, wherein the stopper plate (7) is welded to an additional planar structure of the plate pack.
    Type: Grant
    Filed: February 7, 2014
    Date of Patent: September 4, 2018
    Assignee: VAHTERUS OY
    Inventors: Paavo Pitkänen, Jyrki Sonninen, Piia Gustafsson