Patents by Inventor Friedrich-W. Joern

Friedrich-W. Joern 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).

  • Process for the production of parts with a spirally symmetrical outer contour
    Patent number: 5743321
    Abstract: A casting mold member is produced from a master which has a section with a spirally symmetrical outer contour such that the casting mold member surrounds the section in an azimuthally closed manner with respect to the axis of symmetry. The casting mold member is used to provide a casting mold. The casting mold member is filled by feeding a cast iron melt, and solidifying the melt by using a graphitization pressure to prevent cavities and pores in the casting and by chilling the melt to obtain shell hardening.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: April 28, 1998
    Assignee: Bitzer Kuehlmaschinenbau GmbH & Co. KG
    Inventors: Friedrich-W. Joern, Rolf Dieterich, Wolfgang Sandkoetter