Patents by Inventor Heinz Krober

Heinz Krober 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).

  • Device for manufacturing curved helical springs
    Patent number: 5868996
    Abstract: The objects are a reliable and economical method of and device for manufacturing helical springs that are curved when unstressed from sections of wire or rod heated to coiling temperature. The spring is coiled straight and then curved it to its final shape. The device consists of a hot-coiling production line comprising a kiln (1), a series of rollers (2), a coiling bench (4), and a quenching tub (6). A tool (5) for curving helical springs (10 or 14) is integrated into the production line between the coiling bench and the quenching tub.
    Type: Grant
    Filed: July 28, 1993
    Date of Patent: February 9, 1999
    Assignee: Fried. Krupp AG Hoesch-Krupp
    Inventors: Hans Vondracek, Heinz Krober