Patents by Inventor Carl Francis Ruigrok

Carl Francis Ruigrok 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: 5752407
    Abstract: A process for producing an agricultural sweep defining upper and lower major surfaces and having a predetermined shape including an earth engaging pointed head portion with a pair of wings symmetrically diverging rearwardly and generally horizontal from a nose region. Each wing has a bevel-like configuration on the upper surface of the sweep and an attachment portion integrally formed with and extending upwardly and rearwardly from the head portion. The unique process of the present invention begins with providing a planar preformed blank having a developed shape of the cultivator sweep. Thereafter, the blank is heated to an elevated temperature. The blank is thereafter loaded into a forming die set including first and second cooperatively arranged forming dies. One forming die is configured with a mirror image of one side of the cultivator sweep and the other forming die is configured with the opposite major side of the cultivator sweep.
    Type: Grant
    Filed: January 19, 1995
    Date of Patent: May 19, 1998
    Assignee: Case Corporation
    Inventors: Ken George Becker, Carl Francis Ruigrok