Patents by Inventor M. Jack Rollins

M. Jack Rollins 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).

  • Ceramic gate valve and components therefor
    Patent number: 4372531
    Abstract: The present invention comprises an improved ceramic gate valve having within the valve housing a ceramic valve gate, which is surrounded by a peripherally disposed compression band for providing strength thereto, and which is engaged by a pair of ceramic valve seats, which are in turn urged inwardly for such engagement by ceramic springs. The ceramic springs comprise a plurality of plates of ceramic material separated by spacers which are disposed in a staggered array to form the ceramic spring.
    Type: Grant
    Filed: November 18, 1980
    Date of Patent: February 8, 1983
    Assignee: Maxon Corporation
    Inventors: M. Jack Rollins, William P. Coppin