Patents by Inventor Hans-Dieter Knietzsch

Hans-Dieter Knietzsch 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).

  • Patent number: 4848264
    Abstract: A pointer for an indicating instrument is constructed of material transparent to light, the pointer having an elongated shape and a cross section having two inclined sides directed towards an apex, and a lower side opposite the apex and facing a face of the indicating instrument. The lower surface is provided with a layer of coloring, substantially opaque to the light, and giving a colored appearance to the pointer upon viewing the pointer by looking straight down upon the indicator face or at an angle thereto. The inclination of the pointer sides provides for respective refraction and total internal reflection to viewing rays of light which make visible the coloring.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: July 18, 1989
    Assignee: VDO Adolf Schindling AG
    Inventors: Hans-Dieter Knietzsch, Gerhard Wesner
  • Patent number: 4768461
    Abstract: A support (2) which serves for fastening a pointer (1) on a pointer shaft has, towards the top, a holding part (12) which is developed as an expansion rivet. The pointer (1) has a central passage (13) through which the holding part (12) engages. A cap (3) is provided with an expansion pin (14) which is adapted to be pushed from above into the holding part (12) when the cap (3) is mounted. In this way, the expansion rivet is expanded and the pointer (1) is thereby attached firmly to the support (2). A projection (16) on the holding part (12) which engages into a recess (17) in the pointer (1) determines the exact angular position of the pointer (1) with respect to the holding part (12).
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: September 6, 1988
    Assignee: VDO Adolf Schindling AG
    Inventors: Hans-Dieter Knietzsch, Gerhard Wesner