Patents by Inventor Josephus A. M. van der Tak

Josephus A. M. van der Tak 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).

  • Scrubbing machine
    Patent number: 4838193
    Abstract: A scrubbing machine is disclosed which is particularly useful for cleaning the hull of a ship below the waterline. The scrubbing machine includes rotary brushes driven by a single pump motor that also functions to create suction in a closed brush control circuit. The scrubbing machine also includes adjustable spacers that help provide efficient cleaning action.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: June 13, 1989
    Inventor: Josephus A. M. van der Tak
  • Steering system for a ship
    Patent number: 4315476
    Abstract: A steering system comprising a propeller in a flow duct across a ship is provided with a wedge shaped valve to shift the flow direction between the sides of the ship, which wedge shaped valve has its vertical pivot shaft in the wedge center line directed into the onflow and its wedge sides arranged as flow guides.
    Type: Grant
    Filed: October 14, 1980
    Date of Patent: February 16, 1982
    Inventor: Josephus A. M. van der Tak