Patents by Inventor Klaas H. Langenberg

Klaas H. Langenberg 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: 5464324
    Abstract: A variable-pitch propeller or fan comprises a hollow boss, a number of propeller blades fitted rotatably on the boss, and also an adjusting element which is axially slidable in the boss and has a number of grooves running essentially at right angles to the direction of sliding, each propeller or fan blade having a control pin which is placed eccentrically relative to its rotary shaft and is slidingly accommodated in a groove of the adjusting element. In order to increase the range of adjustment each groove comprises an essentially straight part and also a second part connecting to the straight part and forming an angle with the essentially straight part.
    Type: Grant
    Filed: May 2, 1994
    Date of Patent: November 7, 1995
    Inventor: Klaas H. Langenberg