Patents by Inventor Jean L. Randon

Jean L. Randon 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 manufacture of gate valves for closure devices having a pouring nozzle and similar objects
    Patent number: 4248815
    Abstract: In order to manufacture a casting nozzle plate assembly, e.g., a sliding closure of a slide plate and collector nozzle, without having to further machine the working surface of one assembly a mold is arranged on a trued slab. A refractory concrete is poured into the mold while the mold is vibrated. The concrete is allowed to harden before being separated from trued slab. The resulting assembly has a smooth work (e.g., sliding) surface for contact with another element.
    Type: Grant
    Filed: February 6, 1979
    Date of Patent: February 3, 1981
    Assignee: Kaiser Electro Refractaire France
    Inventors: James B. Blackburn, Jean L. Randon