Patents by Inventor Helmut Hillemacher

Helmut Hillemacher 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).

  • Patent number: 4384636
    Abstract: This relates to a device for pulling together sewer pipes and other large diameter pipes. The device includes a mobile pulling unit which is preferably mounted on wheels and may be driven through the large diameter pipes. The mobile pulling unit has a pulling cable which extends from a lower portion thereof. A support system is pivotally mounted on the pulling unit and is preferably in the form of an elongated lever including a lower lever arm and an upper lever arm with the two lever arms being disposed in angular relation with respect to each other and carrying shoes for engaging lower and upper surfaces of a pipe in which the pulling unit is mounted. A pressure applying device extends between the pulling unit and the upper lever arm so as to tilt the support means and effect the anchorage thereof in the pipe.
    Type: Grant
    Filed: February 12, 1981
    Date of Patent: May 24, 1983
    Assignee: Josef Krings
    Inventor: Helmut Hillemacher