Patents by Inventor Wolf D. Keppel

Wolf D. Keppel 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).

  • Method for producing fluid flow regulators
    Patent number: 4632791
    Abstract: The invention relates to a method of making a fluid flow regulator, in which an elastic ring acts in response to pressure against a profiled core or an inner surface of a casing. It is possible with this method to perform matching of the regulators to a desired value quickly and without excessive waste. To this end the casting moulds for the profiled core or the inner surface are finish-machined in a certain way in dependence on the flow characteristic of the regulator.
    Type: Grant
    Filed: January 18, 1984
    Date of Patent: December 30, 1986
    Assignee: Reinhard Carl Mannesmann
    Inventors: Wolf D. Keppel, Reinhard C. Mannesmann