Patents by Inventor by Lotte Roth, heir

by Lotte Roth, heir 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).

  • Method and apparatus for producing a foundry mold
    Patent number: 4357984
    Abstract: A mold filling and compacting method includes forming a compact body of mold substance such as sand in an intermediate container and then abruptly opening the bottom closure of the container while releasing the sand, as a compact mass, so that it drops as a packet into the mold box, compacting itself effectively around a pattern arrangement. Specific techniques for releasing, including sudden lifting, sudden dropping and separating the container parts are disclosed as well as apparatus for performing the method.
    Type: Grant
    Filed: October 31, 1980
    Date of Patent: November 9, 1982
    Assignee: Georg Fischer Aktiengesellschaft
    Inventors: Erwin Buhrer, deceased, by Grete Brandli, heir, by Lotte Roth, heir, by Doris Baumann, heir