Two-part stationary ring for devices having pistons
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United States of America Patent
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Jan 10, 2017
Grant Date -
Oct 9, 2014
app pub date -
Apr 4, 2014
filing date -
Apr 4, 2013
priority date (Note) -
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Abstract
In some two-stroke engines, a stationary ring is disposed in a groove in the cylinder liner. However, it is a challenge to install such a stationary ring while maintaining a narrow gap to minimize gas flow through the gap. A ring system for an internal combustion engine is disclosed that includes an L-shaped, split ring with a reentrant angle and a nested, split ring with a convex quadrilateral cross section nested with the L-shaped ring proximate the reentrant angle. The two rings are affixed so that the two gaps of the split rings cannot align. Or, in other embodiments, the two are allowed to rotate relative to each other over a predetermined angle.
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