Patents by Inventor Antti Tavi

Antti Tavi 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).

  • End packing for a deflection compensated roll
    Patent number: 6692421
    Abstract: The present invention relates to an end packing (20, 40, 60, 70, 80) for a deflection compensated roll. The roll including a stationary shaft (1) and a roll shell (2), bearing-mounted rotatably therearound and having each end thereof provided with a shaft-enclosing annular end cap (3). The end cap (3) has its surface internal in the axial direction of the roll or its surface external in the axial direction formed with a sealing surface (10, 50, 61, 71, 81). The end packing elements (20, 40, 60, 70, 80) are provided with an annular packing member (12; 42; 62; 72; 82) extending around the shaft (2) and including a front face, which is directed towards said sealing surface (10, 50, 61, 71, 81) and which is in contact with the sealing surface (10, 50) or separated from the sealing surface (61, 71, 81) by a gap constituting an axially directed narrow slot.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: February 17, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Antti Tavi, Ari Lehto, Kari Holopainen, Markku Arvonen, Mika Lämsä, Juhani Niskanen, Jorma Snellman, Jouni Pakkanen, Jori Onnela
  • End packing for a deflection compensated roll
    Publication number: 20020115542
    Abstract: The present invention relates to an end packing (20, 40, 60, 70, 80) for a deflection compensated roll. The roll including a stationary shaft (1) and a roll shell (2), bearing-mounted rotatably therearound and having each end thereof provided with a shaft-enclosing annular end cap (3). The end cap (3) has its surface internal in the axial direction of the roll or its surface external in the axial direction formed with a sealing surface (10, 50, 61, 71, 81). The end packing elements (20, 40, 60, 70, 80) are provided with an annular packing member (12; 42; 62; 72; 82) extending around the shaft (2) and including a front face, which is directed towards said sealing surface (10, 50, 61, 71, 81) and which is in contact with the sealing surface (10, 50) or separated from the sealing surface (61, 71, 81) by a gap constituting an axially directed narrow slot.
    Type: Application
    Filed: January 23, 2002
    Publication date: August 22, 2002
    Inventors: Antti Tavi, Ari Lehto, Kari Holopainen, Markku Arvonen, Mika Lamsa, Juhani Niskanen, Jorma Snellman, Jouni Pakkanen, Jori Onnela