Patents by Inventor Dirk Schmidt

Dirk Schmidt 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: 5096643
    Abstract: The plate-like valve elements (10 and 20) of the microvalve are provided with a plurality of valve seats and, respectively, corresponding valve members. The sealing surfaces of a secondary valve element (10) are respectively formed by molding to copy the sealing faces of a primary valve element (20) so that the sealing surfaces of both valve elements are completely complementary to each other. The sealing surfaces need no further processing such as machining. Despite liberal tolerances of manufacture a high precision register of the valve elements in relation to each other is ensured.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: March 17, 1992
    Assignees: Burkert GmbH Werk Ingelfingen, Kernforschungszentrum Karlsruhe GmbH
    Inventors: Bernd Kowanz, Dirk Schmidt, Wolfgang Ehrfeld
  • Patent number: 5054522
    Abstract: A valve plate (14) provided with slot-like valve ports (16) is able to slide between two stationary valve plates (10 and 12) which are joined with each other and are provided with corresponding slot-like valve ports (16). A electrostatic drive is integrated in the valve plates (10, 12 and 14). It consists of strip-like electrodes (20 and 22) which are arranged opposite to corresponding electrodes of another valve plate. By the application of suitable actuating potentials with the same or opposite polarity to the electrodes of different valve plates the actuating forces may be produced, which are needed for moving the movable valve plate (14).
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: October 8, 1991
    Assignees: Burkert GmbH Werk Ingelfingen, Kernforschungszentrum Karlsruhe GmbH
    Inventors: Bernd Kowanz, Dirk Schmidt, Wolfgang Ehrfeld