piston ring definition

  • noun:
    • a variable split steel ring that meets around a piston and seals the gap amongst the piston together with cylinder wall.
    • A ring or seal that suits around a piston, closing between your piston plus the bore where it slides.
    • A packing-ring; a ring, often of cast-iron, brass, or metal, placed in a groove in a piston for the purpose of avoiding the steam or gas from moving the piston.
    • seal composed of a split material ring that seals the gap between a piston in addition to cylinder wall surface
  • others:
    • A spring packaging ring, or any one of a number of these types of rings, for a piston.

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