Oil control ring for pistons of internal combustion engines

Details Oil control ring for pistons of internal combustion engines Oil control ring for pistons of internal combustion engines

2007-12-11

2007-12-11

Pickard, Alison K (Department: 3673)

Seal for a joint or juncture

Seal between relatively movable parts

Piston ring or piston ring expander or seat therefor

C277S465000, C277S472000

Reexamination Certificate

active

10578121

ABSTRACT:
The invention relates to an oil control ring for pistons of internal combustion engines. The aim of the invention is to provide an improved shape-adaptation capacity in comparison to prior art, with a tangential force that enables the ring to guarantee low friction and also low oil consumption during the operation of the engine. To achieve this, the inventive oil control ring comprises a solid bearing surface that lies against the cylinder wall, in addition to parallel ring flanks, between which a radial recess that runs around the periphery is configured in the rear of the ring, said recess being designed to receive a coil spring. The peripheral region of the ring flanks is provided with undulating end faces that face towards the rear of the ring. Said undulating end faces of the upper and lower ring flanks are offset out of phase with one another.

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International Search Report.

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