Patents by Inventor Juha Laitinen

Juha Laitinen 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).

  • Closing valve for a regulation valve of a variable-crown roll in a paper machine and a variable-crown roll including the same
    Patent number: 6135935
    Abstract: A closing valve for a regulation valve of a roll in a paper machine, such as a variable-crown roll, including a frame part arranged between the regulation valve of a regulation valve block and a block frame and in which pressure medium ducts are formed. The closing valve includes a connecting part movable in relation to the frame part and having closing members mounted thereon and which are arranged to extend into the pressure medium ducts in the frame part. When the connecting part is displaced in relation to the frame part, the closing members attached to the connecting part close and open the pressure medium ducts in the frame part. A variable-crown roll including one or more closing valves is also disclosed.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: October 24, 2000
    Assignee: Valmet Corporation
    Inventors: Pekka Kivioja, Juha Laitinen