compression rings

compression rings

The top rings used on reciprocating engines' pistons. They seal the cylinder, so that an upward-moving piston can compress the air into the cylinder. Compression rings also transfer heat from the piston to the cylinder wall.
References in periodicals archive ?
Automotive piston systems comprise of piston, compression rings, oil rings, and piston pin.
The wide, shallow pistons have two compression rings instead of the GP6's single ring, but are identical in every other respect.
The ends of the structure are contained within compression rings.
In addition to the self-locking feature, these connectors also offer superior sealing protection through dual compression rings and dual o-rings.
According to Reisser: "Our technology is no longer employing metal compression rings nor metal oil control rings.
In addition, the 1-Piece Connectors provide excellent holding strength and weather resistance, thanks to internal 360 degree compression rings.
Exceptional connector performance is assured through use of three 360-degree compression rings and a visual confirmation of cable entry.