Patents by Inventor Helmut Kroeker

Helmut Kroeker 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: 4969643
    Abstract: The invention is directed to an improved exercise apparatus, of the type having a fixed base and an associated movable portion. A hydraulic system is attached to both by a cylinder, on movement of the movable portion with respect to the base, a hydraulic fluid current is generated through a flow control valve. By adjusting the flow control valve resistance to the current can be varied causing greater or lesser resistance to the exertions of the user of the apparatus. Preferably paired flow control valves are utilized providing adjustable accommodating resistance to movement in either direction. The adjustment controls are conveniently mounted on the movable portion for user/operator access.
    Type: Grant
    Filed: June 7, 1989
    Date of Patent: November 13, 1990
    Inventors: Helmut Kroeker, Peter Kampen