Patents by Inventor Gerhard Knall

Gerhard Knall 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).

  • Manufacturing process for die-cast light-metal wheels of passenger cars
    Patent number: 4995917
    Abstract: A manufacturing process for die-cast light-metal parts, particularly die-cast light-metal wheels for passenger cars using gravity die-casting process using an almost eutectic refined GK-ALSill/Sr-kf alloy having 0.05 to 0.1% parts by weight of magnesium and without any additional significant hardenable constituents. The die-cast wheel is subject to quenching from a temperature of 350.degree. C. to 475.degree. C. immediately after its removal from the die in water of no more than 50.degree. C., and as a result, a considerable increase of the bending fatigue strength in central areas, and of the impact resistance in the edge areas of the wheel is achieved.
    Type: Grant
    Filed: March 27, 1989
    Date of Patent: February 26, 1991
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Amer Dagustany, Jochen Spriestersbach, Bernd Gunther, Gerhard Knall