Patents by Inventor Ralph Dorr

Ralph Dorr 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).

  • Rotating sail fluid current motor
    Patent number: 4388041
    Abstract: A fluid operated motor utilizes one or more flexible rectangular sails and associated supporting frames, sail guides and drive apparatus enabling each of the sails to cyclically fold and unfold, drive the sail supporting frames and provide a source of power when placed in a moving stream of fluid such as in a wind stream, river or gas stack.
    Type: Grant
    Filed: September 8, 1980
    Date of Patent: June 14, 1983
    Inventor: Ralph Dorr