Patents by Inventor Johann Langgartner

Johann Langgartner 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).

  • Cast wheel rim
    Patent number: 6877820
    Abstract: A cast wheel rim including a light-metal body which at least partially encompasses at least one shaped part forming a cast-in core and having a mean specific weight smaller than that of the light metal used for the body, wherein the shaped part is comprised of a pressed body made of a porous silicate material.
    Type: Grant
    Filed: September 17, 2001
    Date of Patent: April 12, 2005
    Assignee: Austria Alu-Guss-Gesellschaft m.b.H.
    Inventor: Johann Langgartner
  • Cast wheel rim
    Publication number: 20030141755
    Abstract: A cast wheel rim (1) including a light-metal body (2) which at least partially encompasses at least one shaped part (8, 8′, 8″) forming a cast-in core and having a mean specific weight smaller than that of the light metal used for the casting, wherein the shaped part (8, 8′, 8″) is comprised of a pressed body made of a porous silicate material.
    Type: Application
    Filed: December 16, 2002
    Publication date: July 31, 2003
    Inventor: Johann Langgartner
  • Method of mechanical surface treatment of a blank metal sheet
    Patent number: 5111572
    Abstract: A method of mechanically imparting a surface texture to a bland surface of sheet metal, especially soft aluminum, in which an adherent foil is applied at least to one surface of the sheet metal and is pressed into and against a surface by a roll so that the sheet metal is deformed and the pattern of the deformed foil is pressed into the sheet metal surface.
    Type: Grant
    Filed: February 22, 1991
    Date of Patent: May 12, 1992
    Assignee: Austria Metall Aktiengesellschaft
    Inventors: Gottfried Haiml, Johann Langgartner