Patents by Inventor Ralph S. Evinrude

Ralph S. Evinrude 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).

  • Marine propulsion device including propeller protection means
    Patent number: 4235183
    Abstract: Disclosed herein is a marine propulsion device including a lower unit having a gear case, a laterally extending anti-cavitation plate extending above a propeller carried on a propeller shaft rotatably mounted in the gear case, and a pair of generally flat side fins, each of which has a laterally extending trailing edge located wholly forwardly of the propeller and which either extend laterally in coplanar relationship from the opposite sides of the gear case, extend laterally in coplanar relationship from the opposite sides of the lower unit at a location between the anti-cavitation plate and the gear case, extend outwardly and downwardly in an angular relationship from the opposite sides of the gear case, or extend laterally in coplanar relationship from the opposite sides of the lower end portion of a vertical fin extending downwardly from the gear case.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: November 25, 1980
    Assignee: Outboard Marine Corporation
    Inventor: Ralph S. Evinrude
  • Marine propulsion device including propeller protection means
    Patent number: 4096819
    Abstract: Disclosed herein is a marine propulsion device including a lower unit having a gear case, a laterally extending anti-cavitation plate extending above a propeller carried on a propeller shaft rotatably mounted in the gear case, and a pair of generally flat side fins, each of which has a laterally extending trailing edge located wholly forwardly of the propeller and which either extend laterally in coplanar relationship from the opposite sides of the gear case, extend laterally in coplanar relationship from the opposite sides of the lower unit at a location between the anti-cavitation plate and the gear case, extend outwardly and downwardly in an angular relationship from the opposite sides of the gear case, or extend laterally in coplanar relationship from the opposite sides of the lower end portion of a vertical fin extending downwardly from the gear case.
    Type: Grant
    Filed: November 3, 1976
    Date of Patent: June 27, 1978
    Assignee: Outboard Marine Corporation
    Inventor: Ralph S. Evinrude