Patents by Inventor Johan Sterken

Johan Sterken 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).

  • Patent number: 6000349
    Abstract: The invention relates to a rollable container for storing, transporting and distributing a mass having little or no cohesion, for instances; liquids incorporating possibly solid constituents, such as liquid manure or fertilizer; or solid substances consisting of granules and/or powder. A container is provided in which the contact pressure with the ground is considerably reduced. The container is embodied as a hollow wheel, which is mounted via rotation bearings for rotation in a frame which is coupled or can be coupled by a coupling device to a motor vehicle, for instance a tractor, the space in the wheel being sealingly connected via a rotation bearing to a conduit which is stationary relative to the frame or at least occupies a substantially fixed position relative to the frame for supplying and discharging mass to and from the space, which wheel can roll over the ground during movement of the frame caused by the motor vehicle.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: December 14, 1999
    Inventor: Johan Sterken