Patents by Inventor Arthur L. Cilles

Arthur L. Cilles 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).

  • Pilot operated stepping directional valve and method for single line operation
    Patent number: 4813749
    Abstract: A piloted rotary two-way "on-off" valve which will couple hydraulic fluid from the valve input to the valve output in the "on" position and then move to the "off" position where it will maintain the pressure on the down stream side while enabling the pressure on the upstream side to be removed.
    Type: Grant
    Filed: December 24, 1987
    Date of Patent: March 21, 1989
    Assignee: Dresser Industries, Inc.
    Inventor: Arthur L. Cilles