Patents by Inventor Frederic Valin

Frederic Valin 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 having a cavity by pressing
    Patent number: 5092023
    Abstract: A process for the production of, in particular, ceramic parts having a cavity by press molding or pressing sealed sheaths.The core used for defining the cavity and preventing subsequent machining operations is initially more voluminous than the desired cavity and has an adequate ductility to allow partial extrusion during pressing. This avoids often excessive mechanical stresses, which can lead to a bursting or shattering of the densified part when the sheath is removed. This process has, application to the hot isostatic pressing of fragile materials.
    Type: Grant
    Filed: November 21, 1990
    Date of Patent: March 3, 1992
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Marcel Boncoeur, Frederic Valin