Patents by Inventor Evan R. Johnson

Evan R. Johnson 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).

  • Patent number: 4204558
    Abstract: A valve assembly having remotely replaceable bearings is disclosed wherein a valve disc is supported within a flow duct for rotation about a pair of axially aligned bearings, one of which is carried by a spindle received within a diametral bore in the valve disc, and the other of which is carried by a bearing support block releasably mounted on the duct circumferentially of an annular collar on the valve disc coaxial with its diametrical bore. The spindle and bearing support block are adapted for remote removal to facilitate servicing or replacement of the valve disc support bearings.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: May 27, 1980
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Evan R. Johnson, David E. Tanner