Patents Represented by Attorney T. O. Groeger

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  • Tetrahedral windmill
    Patent number: 4375035
    Abstract: A wind-adjustable air turbine consisting of: 1. a tetrahedral support structure, 2. at least one blade extending into opposite tetrahedral edges, and 3. an axis of rotation extending from the structure's center and movable into any of the edges' centers, whereby the blade's rotation and/or drag is changed.
    Type: Grant
    Filed: April 3, 1981
    Date of Patent: February 22, 1983
    Inventor: Theodore O. Groeger