Patents by Inventor Alfred Vieth

Alfred Vieth 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).

  • Impeller for an axial-flow type fan
    Patent number: 5290149
    Abstract: The invention is directed to an impeller of an axial-flow type fan, in particular for appliances for drying and dressing hair, in which adjacent blades overlap each other completely over the radial extent of the blades in the edge regions of the blades. To ensure that the injection-molded impeller is capable of being ejected from the mold, the angle of opening is required to be smaller than or equal to the angle of rotation.
    Type: Grant
    Filed: February 25, 1992
    Date of Patent: March 1, 1994
    Assignee: Braun Aktiengesellschaft
    Inventor: Alfred Vieth