Patents by Inventor Ernest F. Twist

Ernest F. Twist 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).

  • Dust stop
    Patent number: 4180332
    Abstract: A seal arrangement for the shaft of a high intensity mixer rotor comprises a block housing a plurality of pistons which together urge a collar axially of the shaft into engagement with a sealing surface of the rotor. The pistons are mounted in chambers in the block, and are all connected to a common pressurizable fluid inlet in the block. The block may be U-shaped to facilitate removal of the block from the shaft.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: December 25, 1979
    Assignee: USM Corporation
    Inventor: Ernest F. Twist