Federal-mogul Burscheid Gmbh

Jörn Pröpper

Richard Mittler

Fabian Ruch

Jurgen Gillen

Hans-Rainer Brillert

Jürgen Gillen

Döndü Karabel

Fabian Horst Ruch

A piston ring includes a ring outer side, an upper ring flank and a lower ring flank, whereby the ring outer side has a pressure relief chamfer at an upper edge, so that only a lower part of the ring outer side forms a contact surface. An axial dimension of the contact surface varies in the circumferential direction.

Piston ring with variable pressure relief

A stepped piston ring () includes a ring outer side (), an upper ring flank (), and a lower ring flank (). The ring outer side () on the upper edge has a notch (, so that only a lower portion of the ring outer side () forms a contact surface ().

Piston ring having a stepped running surface

Growing community of inventors

Leverkusen, Germany

Jörn Pröpper