Patents by Inventor Helmut Wiehan

Helmut Wiehan 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).

  • Hose fastening arrangement for roller pumps
    Patent number: 5533877
    Abstract: A hose fastening arrangement for roller pumps, especially for a heart-lung machine, which possesses a head constituted of a pump stator and pump rotor, including fastening devices for fastening of the pump piece which is inserted into the pump head of the roller pump. The hose fastening arrangement for roller pumps of the above-mentioned type is detachable from the pump head of the roller pump.
    Type: Grant
    Filed: February 15, 1995
    Date of Patent: July 9, 1996
    Assignee: Stockert Instrumente GmbH
    Inventors: Gunter Friedmann, Helmut Wiehan, Erwin Knott