Patents by Inventor Kenneth D. Shepherd

Kenneth D. Shepherd 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).

  • Fire resistant seat for flow control valve
    Patent number: 4373543
    Abstract: A flow control valve with a valve closure element is provided having at least one annular resilient seat member and an annular flexible metal seat member positioned adjacent to it. The flexible metal seat is held in position by heat resistant gaskets and is biased against the resilient seat member. Upon the failure of the resilient seat to seal because of melting or deterioration caused by exposure to heat, the flexible metal seat member springs into position to provide a fire and heat resistant metal-to-metal seal with the valve closure element.
    Type: Grant
    Filed: June 12, 1981
    Date of Patent: February 15, 1983
    Assignee: The Duriron Company, Inc.
    Inventors: Robert J. Brown, Kenneth D. Shepherd