Patents by Inventor Lumir Zadera

Lumir Zadera 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 of compacting moulding sand
    Patent number: 4415015
    Abstract: A process for compacting moulding sand to form a casting mould comprises the steps of filling a moulding space located between a pattern plate and a pressure plate with moulding sand, pre-compacting the moulding sand, after the moulding space is filled with moulding sand and closed by the pressure plate, by an explosive-type shock pressure, and subsequently re-compacting the moulding sand by mechanically pressing the moulding sand between the pattern plate and the pressure plate.
    Type: Grant
    Filed: October 2, 1980
    Date of Patent: November 15, 1983
    Assignee: George Fischer, Ltd.
    Inventor: Lumir Zadera