Patents by Inventor Wolfgang Schmelter

Wolfgang Schmelter 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: 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 and less than and second length portions immediately adjoining each respective first length portion and having a central angle of approximately 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
  • Patent number: 4973066
    Abstract: A piston-and-ring assembly includes a piston having a circumferential groove which has an upper side wall and an opposite lower side wall; and a piston ring received in the groove and having opposite radial faces extending obliquely with respect to the side walls. The piston ring engages, with an axial bias, the upper and lower side walls with an annular marginal surface portion forming part of each radial face of the piston ring and extending substantially parallel to the side wall with which it is in engagement.
    Type: Grant
    Filed: May 21, 1985
    Date of Patent: November 27, 1990
    Assignee: Goetze AG
    Inventors: Gerhard Duck, Hans-Rainer Brillert, Albin Mierbach, Wolfgang Schmelter