Patents by Inventor Joni Leinvuo

Joni Leinvuo 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 of measuring the geometry of grooves in an elongated element
    Patent number: 6842258
    Abstract: The invention relates to a method and an arrangement for measuring the geometry of grooves in an elongated element, which grooves (2) extend as continuous grooves over the whole length of the elongated element (1), circling around the element, in which method the surface of the elongated element is scanned by of a camera (6). In order to achieve simple non-contact measurement, the elongated element (1) is arranged to travel at the vertex through an annular biconical minor or through a biconical bevelled mirror (3) comprising several plane mirrors, and through a plane mirror structure (4) arranged at an oblique angle relative to the direction of travel of the elongated element (1). An annular laser beam is directed to the plane mirror structure in such a way that the plane mirror structure (4) reflects the beam onto the surface of the elongated element (1) through the outer surface (3a) of the biconical mirror or bevelled cone mirror.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: January 11, 2005
    Assignee: Nextrom Holdings S.A.
    Inventors: Joni Leinvuo, Jouko Viitanen, Juha Korpinen, Jani Uusitalo