Patents by Inventor Johannes Franciscus Reinardus Andreae

Johannes Franciscus Reinardus Andreae 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).

  • Draghead for suction dredger
    Patent number: 4083132
    Abstract: Method and a draghead to be used therein for sucking a slurry of earth and transport water by means of a trailing suction dredger, the draghead including at least one cutter for loosening the earth and water guiding means being provided to guide the transport water to the suction line in a powerful jet substantially parallel to and along the top edge of the cutter.
    Type: Grant
    Filed: June 15, 1976
    Date of Patent: April 11, 1978
    Assignee: Bos Kalis Westminster Group N.V.
    Inventor: Johannes Franciscus Reinardus Andreae
  • Method and apparatus for dredging employing a transport fluid flowing in substantially closed recirculating course
    Patent number: 3975842
    Abstract: Dredging or suction of a soil suspension from the sea bottom is effected through a suction conduit connected with a suction head enclosure resting on the sea bottom, there concurrently being supplied to the suction head enclosure and through a separate conduit connected therewith a transport fluid under pressure. Transport fluid is separated from the soil suspension collected at the surface and recycled to the suction head enclosure. Thus the transport fluid flows in a substantially closed recirculating flow course and consequently pollution of the sea is lessened.
    Type: Grant
    Filed: October 15, 1974
    Date of Patent: August 24, 1976
    Assignee: Bos Kalis Westminster Group N.V.
    Inventor: Johannes Franciscus Reinardus Andreae