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๐ SIMILAR VOLUMES
## and Mahle Metal Leve S.A. Brasil The invention relates to steel or cast iron piston rings with a coating of chromium nitride deposited by a physical vapour deposition on the sliding surface. The coating is composed of a columnar crystal structure of CrN with an oxygen content in solid solution
them is significantly small, it does not affect the reciprocation of the displacer. As the seal is provided so as not to be restricted axially and radially, the displacer is kept closely contacted with the inner peripheral surface of the cylinder even if the displacer shifts eccentrically.
increase the wear life before lockup occurs in WO 03/102399.
This invention relates to a seal for a screw-top bottle. The aim of the invention is to provide a seal that is easy to handle and inexpensive to produce. For this purpose, the seal comprises several deformed sections that are plastically deformed in such a manner that they form recesses (21, 22) in
This patent describes a seal for oilfield equipment joints that is designed to permit the use of plastic sealing materials, while overcoming the inherent limitations associated with plastics. It is particularly intended to improve the performance of the seals with respect to their capabilities with