Piston ring with spring end and improved stability

摘要

The piston ring (23) comprises a spring end (27) with a circular fillet radius (29) of between 90-180 deg . The spring end comes into contact with the upper side (31) of the piston (5) and one end, with the other end installed at the opposing surface (33) with a circular seat surface (35). A section has different forming angles to their neighboring sections. A pressure ring (37) lies between the outer surface (25) of the piston and piston ring, which seals the wall.