Patents by Inventor Patrick J. Kelly, Jr.

Patrick J. Kelly, Jr. 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).

  • Inboard servo for marine controllable pitch propellers
    Patent number: 4872811
    Abstract: An inboard servo for a controllable pitch propeller of the force rod type comprises a feedback device having at least two feedback rods connected to the piston and extending through the cylinder end wall and an output ring connected to the rods. An emergency lock-up includes at least two threaded locking rods fastened to the cylinder and passing freely through holes in the feedback ring, each of which receives one or more nuts that can be threaded along the rod for engagement with the feedback ring to lock the piston in a desired position.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: October 10, 1989
    Assignee: Bird-Johnson Company
    Inventors: Joseph L. Cavallaro, Patrick J. Kelly, Jr.