Protection against contamination of an orifice, spacer and method of safeguard against contamination of an orifice

摘要

Protection against contamination of an opening in an outer surface of an elongated machine part. According to the invention, a flexible circular unbroken band is provided over opening and towards the outer surface whereby the band either itself covers the opening or holds a plug in the opening or is made out of a piece with a plug that fits moldably down into the opening.