Patents by Inventor Thomas J. Ellich

Thomas J. Ellich 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).

  • Flange seal
    Patent number: 5330158
    Abstract: A flange seal, disposed on opposed sides of a bore and chest liner embodied in a gate valve and secured to one of a pair of rings disposed in opposed sides of the bore section of the liner, enhances the integrity of the seal formed between the gate valve and each respective radial flange of a connected pipe.
    Type: Grant
    Filed: September 16, 1993
    Date of Patent: July 19, 1994
    Assignee: NewCon Co.
    Inventors: Thomas J. Ellich, Dennis J. Peterson