Patents by Inventor Stanley K. Hartwich

Stanley K. Hartwich 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).

  • Publication number: 20110311309
    Abstract: A wing blade attachment for a motor grader used to maintain unimproved rural roads. The wing blade attachment mounts to a trailing end of a main motor grader blade and swings up and down into ground scraping contact in order to create water drainage passages through the gravel windrows along the road edges or to smooth roadways at intersections, bridges and driveways. The windrows are placed by road maintenance crews to stockpile materials for roadway use. A linear actuator such as a hydraulic ram allows the grader operator to remotely and selectively swing the wing blade up and down and cut passages.
    Type: Application
    Filed: June 22, 2010
    Publication date: December 22, 2011
    Inventors: Stanley K. Hartwich, Mark E. Smith