Patents by Inventor Heinrich-Christian Mader

Heinrich-Christian Mader 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).

  • Piston ring having a non-uniform radial pressure distribution
    Patent number: 5380018
    Abstract: A piston ring has a gap defined by ring gap faces oriented toward one another and a nominal outer radius assumed by the piston ring in a closed position in which the piston ring is in an installed state in an engine cylinder having a radius equalling the nominal outer radius of the piston ring. The piston ring has first length portions extending from both ring gap faces and having a central angle of at least 15.degree. and less than 25.degree. and second length portions immediately adjoining each respective first length portion and having a central angle of approximately 10.degree.. In the installed state the first length portions have a radius of curvature equalling the nominal outer radius and the radius of curvature of the second length portions is smaller than the nominal outer radius.
    Type: Grant
    Filed: December 4, 1992
    Date of Patent: January 10, 1995
    Assignee: Goetze AG
    Inventors: Heinrich-Christian Mader, Albin Mierbach, Wolfgang Schmelter