Compression rings for pistons

Details Compression rings for pistons Compression rings for pistons

1980-12-24

1983-02-01

Smith, Robert I.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277217, F16J 1520

Patent

active

043711740

ABSTRACT:
For the avoidance of the build-up of oil carbon in the ring grooves of the pistons of an internal combustion engine, the compression ring (1) has on its inner circumference, distributed over its entire height, a plurality of sharp edges which are formed by projections (2) or recesses (7). The edges are so aligned that, when the compression ring (1) rotates, they act in a scraping manner on any oil carbon that is building up in the radial bottom of the ring groove. The projections (2) or recesses (7) producing the edges are at least 0.5 mm high or deep. For reasons of strength, the sharp edges may be restricted to the ring zone between 70.degree. and 100.degree. on both sides of the ring joint. It is also possible to provide the sharp edges on an intermediate ring (6) to be inserted into the compression ring (1).

REFERENCES:
patent: 2368137 (1945-01-01), Harmon

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