Patents Assigned to Datawell B.V.
  • Angular velocity sensor
    Patent number: 5237872
    Abstract: An angular velocity sensor is provided with a spherical liquid inertia mass, preferably mercury, which can rotate with respect to a vessel in which it is contained. A magnetic field passes through the inertial mass and the electrode pairs. One electrode of each pair of electrodes between which a voltage is measured is located in the center and the other near the wall of the spherical mass and/or in which the direction of the magnetic field is invariable in space.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: August 24, 1993
    Assignee: Datawell B.V.
    Inventor: Petrus J. Rademakers
  • Buoy
    Patent number: 4639227
    Abstract: A buoy having a mainly circular upper surface and on this surface an auxiliary circular float body located at the center of this surface, the dimensions of the this upper surface and the auxiliary float body being such, that the buoy in rough water restores automatically its original position after it has been reversed and that wind forces create pressure deviations on this surface that compensate the tilting momentum exerted by the wind on the auxiliary float body itself and even the rest of the buoy.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: January 27, 1987
    Assignee: Datawell B.V.
    Inventor: Petrus J. Rademakers
  • Anchoring system for a buoy, specially a measuring buoy
    Patent number: 4498877
    Abstract: An anchoring system for buoys and specially measuring buoys in which an anchoring line is connected to an anchoring line connection member which is connected by at least two connection links to the buoy. The connection links have equal length and the connection points q of the links with the anchoring line connection member have a configuration that is congruent to the configuration of the points p, where the links are connected to the buoy.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: February 12, 1985
    Assignee: Datawell B.V.
    Inventor: Petrus J. Rademakers
  • Buoy for measuring wave slopes
    Patent number: 4466281
    Abstract: Buoy for measuring wave slopes provided with a mainly circular disc shaped body having a mainly horizontal lower surface and protruding downwardly from said lower surface a central circular protrusion having a smaller diameter than said lower surface and dimensioned such that with a horizontal current the pressure deviation caused by said protrusion generates on said lower surface a tilting moment opposite and at least equal to the tilting moment caused by the protrusion itself.
    Type: Grant
    Filed: January 11, 1982
    Date of Patent: August 21, 1984
    Assignee: Datawell B.V.
    Inventor: Petrus J. Rademakers