Patents by Inventor Ronald W. Ruddle

Ronald W. Ruddle 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).

  • Feeding unit for a casting
    Patent number: 4131152
    Abstract: A feeding unit comprising a breaker core and a riser sleeve. In a first embodiment the breaker core has a thickness of 10% of the diameter of the riser sleeve and the opening in the breaker core is from 20% to 35% of the riser sleeve diameter.In another embodiment of the invention the breaker core opening is tapered inwardly and downwardly in a generally v-cross sectional shape and one embodiment of the invention will have a symmetrical v-cross sectional area.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: December 26, 1978
    Assignee: Foseco Trading AG
    Inventors: Ronald W. Ruddle, Frank Neat