Patents by Inventor Joachim Lietzau

Joachim Lietzau 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).

  • Tower crane with hammer head adaptation
    Patent number: 4573593
    Abstract: A flat box is interposed between the pulley carrying head and the top element of the main boom of a tower crane, with traverses being exchangeably hinged to the box, the traverses being tensioned against the head and respectively carry a load cable guiding sheave and a holding cable attachment for the boom.
    Type: Grant
    Filed: October 6, 1984
    Date of Patent: March 4, 1986
    Assignee: Mannesmann AG
    Inventor: Joachim Lietzau