Patents by Inventor Ronald R. Rantilla

Ronald R. Rantilla 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: 5685750
    Abstract: Improvement to boat rowing in which the oars are upwardly biased, rotationally biased and forwardly biased to lift out of the water, rotate into the feathered position and swing to the front of the boat when at rest. A cord, attached to foot pedals, pulls the oars into the vertical position, down into the water and rearward in the water for the power stroke. Oars may be operated by hands only, by feet only or by hands and feet.
    Type: Grant
    Filed: July 6, 1995
    Date of Patent: November 11, 1997
    Inventor: Ronald R. Rantilla
  • Patent number: 5127859
    Abstract: Apparatus for propelling a boat in the direction in which the oarsman is facing using oars which are connnected to a support (80) at their innermost ends (18) so that they are movable rotatably in a horizontal plane, rotatably in a vertical plane and linearly up and down, and which are suspended above the water by a downward force from a compression spring (66) applied at a point inboard of a fulcrum (74) which is attached to the oar connection joint clevis (46) and which is supported by a horizontal bearing surface (72) on which the fulcrum (74) slides as the oar is moved.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: July 7, 1992
    Inventor: Ronald R. Rantilla