Patents by Inventor Daniel E. Underwood

Daniel E. Underwood 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).

  • Torque limited drive for manual valves
    Patent number: H636
    Abstract: The present invention is directed to a torque-limiting handwheel device for preventing manual valves from being damaged due to the application of excessive torque during the opening or closing operation of the valves. Torque can only be applied when ridges in the handwheel assembly engage in channels machined in the face of the baseplate. The amount of torque required for disengagement of the ridges from the channels is determined by the force exerted by various Bellville springs and the inclination of the side faces of the channels.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: June 6, 1989
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Philip G. Elliott, Daniel E. Underwood