SECTIONAL PISTON RING Russian patent published in 2006 - IPC F16J9/06 

FIELD: internal combustion engines.

SUBSTANCE: sectional piston ring comprises the flexible rings and radial expander, whose spring turns are made of radial supporting shelves with end thrust collars interconnected through the axis cross-pieces. The radial supporting shelves of the tangential expander are made with the concave to the center of symmetry of the shape so that the bottom point if the inner concave with respect to the outer surface of the radial supporting shelf is shifted to the center of symmetry of the radial supporting shelf by 0 ≥.05 mm.

EFFECT: enhanced durability and strength.

2 dwg