Patents by Inventor Heikki Kotilainen

Heikki Kotilainen 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 and apparatus for impact testing of bend specimen
    Patent number: 4425786
    Abstract: A method and apparatus for testing of impact toughness of a bend specimen having a notch or similar in a middle portion thereof. According to the invention the bend specimen is supported by a rigid support in a middle area at the opposite side of the specimen with respect to the notch, and is hit from the notched side at two points, positioned on each side of the middle area, with a hammer comprising two spaced-apart hitting edges. The hammer may be of pendulum type and mounted for pivotal movement around a horizontal axis positioned above said specimen.
    Type: Grant
    Filed: October 6, 1980
    Date of Patent: January 17, 1984
    Assignee: Valtion Teknillinen Tutkimuslaitos
    Inventors: Erkki Sirkkola, Heikki Kotilainen