Patents by Inventor Manfred Dripke

Manfred Dripke 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: 5437191
    Abstract: A test frame has an upper end traverse, a lower end traverse below the upper end traverse, a pair of parallel upright tie rods having upper ends fixed in the upper traverse and lower ends fixed in the lower traverse, and a middle traverse between the upper and lower end traverses. Respective cylinders fixed on the middle traverse surrounding the tie rods are vertically slidable on the tie rods and each define with the respective tie rod a substantially closed chamber. A piston provided on each tie rod inside the respective cylinder subdivides the respective chamber into an upper compartment and a lower compartment. A source of fluid having a high-pressure side and a low-pressure side is connectable by a pair of respective valves to either of the respective compartments. A mechanical controller connected to both valves synchronously operates same to synchronize the position and movements of both cylinders.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: August 1, 1995
    Assignee: Zwick GmbH & Co.
    Inventors: Manfred Dripke, Gerhard Saum