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(11) | EP 1 564 396 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | A cylinder for engines having inlet and/or outlet ports |
| (57) The invention relates to a cylinder with ports for engines or machines functionally
associated with a piston provided with at least one piston ring, wherein it is provided,
on the inner surface thereof, at the level of at least one of the ports thereof, a
guide ramp for the piston ring. The invention also relates to a process to design
and produce the cylinder. |