Patents by Inventor Ivan J. Birch

Ivan J. Birch 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).

  • Casting
    Patent number: 4133371
    Abstract: A mould assembly for producing multiple castings in which a plurality of mould components are closely arranged together in an array and define a plurality of mould cavities. At the base of the array there is provided a regularly shaped space which communicates with each of the individual mould cavities via a runner passage and thus molten metal admitted to the space fills each of the mould cavities simultaneously leading to uniform properties in all the castings. The individual mould components are preferably injected moulded in a ceramic material.
    Type: Grant
    Filed: August 22, 1977
    Date of Patent: January 9, 1979
    Assignee: Rolls-Royce Limited
    Inventors: Ivan J. Birch, David Mills