Patents by Inventor James E. Runberg

James E. Runberg 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).

  • Safety valve with a hydraulic actuator
    Patent number: 4087073
    Abstract: Disclosed is a safety valve and hydraulic actuator for the safety valve. The safety valve includes a valve body and a valve member. The hydraulic actuator is adapted to be attached to the valve body and includes a cylinder and piston. A pilot valve controls the pressurizing of the cylinder to affect movement of the piston. This abstract is neither intended to define the scope of the invention, which, of course, is measured by the claims nor is it intended to be limiting in any way.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: May 2, 1978
    Assignee: Otis Engineering Corporation
    Inventors: James E. Runberg, Karl N. Tunstall