scraper ring[′skrāp·ər ‚riŋ]
A piston ring that scrapes oil from a cylinder wall to prevent it from being burned.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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