wiper ring

scraper ring

The bottom ring on a piston whose function is to scrape lubricating oil away from the cylinder walls of a reciprocating engine. This prevents the oil from getting into the combustion chamber of the cylinder. Also called a wiper ring.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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The wiper ring that has also been introduced additionally protects the gland packing from contamination and damage.
The strainer is made of stainless steel and includes a heat-resistant wiper ring. The cups and saucers and the strainer cup are produced from the same high quality glass material.
Additional standard equipment includes en coder, air drive, a drip pan, wiper ring, data logging and many software enhancements.
An optional wiper ring makes the unit suitable for harsh environments.
Additional standard equipment includes encoder, air drive, a drip pan, wiper ring, data logging and many software enhancements.
A wiper ring, together with a spring-loaded drip cup ensures that drips are virtually eliminated, while a fume hood removes any vapours generated during filling.
A wiper ring, together with a spring-loaded drip cup, ensures that drips are virtually eliminated, whilst a fume hood removes any vapours generated during the fill.