Patents by Inventor John M. Dwight

John M. Dwight 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).

  • Device which provides an underwater dry workshop environment for ship propeller inspection and repair
    Patent number: 5823708
    Abstract: There is disclosed a means and a method for inspecting and repairing a propeller on a propeller shaft on a ship. The ship is in the water. A truss is positioned on the propeller shaft. A habitat bag is positioned over the upper part of the propeller and is attached to the truss. Then, the truss is inflated with air. An inspector and/or a repair person can enter into the habitat and work in a dry environment while the ship is in the water. There is no need, in many instances, to place the ship in a dry dock.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: October 20, 1998
    Inventors: John M. Dwight, Richard D. Benson