Patents by Inventor William W. Heyob

William W. Heyob 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).

  • Sealing mechanism and method for screening machines
    Patent number: 6070736
    Abstract: A screen frame and screen are secured into sealing engagement within a screening machine by a screen frame sealing mechanism and method which allows the user to simultaneously raise an entire side of the screen frame into sealing engagement. Advantageously, the entire screen frame can be raised into sealing engagement to prevent the escape of fine material being screened and avoid metal-to-metal contact during the screening process from a single location.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: June 6, 2000
    Assignee: Rotex, Inc.
    Inventors: Brady P. Ballman, William W. Heyob