Patents by Inventor Hannu Piispanen

Hannu Piispanen 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).

  • Lifting hook
    Patent number: 7997634
    Abstract: A lifting hook is arranged to grab an object to be lifted by a cylindrical lifting surface formed thereto, the lifting hook having a hook shank, a hook part joining the hook shank and a locking device arranged to lock the lifting hook to the object to be lifted. To allow the lifting hook to be reliably attached to the piece to be lifted, a mechanical control device is mounted above the hook part to co-operate with the upper surface of the lifting surface for guiding the hook part to a lifting position onto the lower surface of the lifting surface.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: August 16, 2011
    Assignee: Konecranes PLC
    Inventors: Hannu Piispanen, Ari Lehtinen, Jarmo Nikkola, Kimmo Hytönen