Patents by Inventor John K. Pethullis

John K. Pethullis 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).

  • Discharge means for a silo
    Patent number: 5622467
    Abstract: A discharge mechanism for a silo comprising an entry chamber adapted to be in communication with the silo interior and having a directing member mounted in the entry chamber, for rotary movement about a vertical axis, to direct flowable material in the entry chamber through a discharge passage in a bottom wall of the chamber.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: April 22, 1997
    Assignee: Portasilo Limited
    Inventor: John K. Pethullis