valve ring
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ring — A circular piece or band of metal. See balk ring blocking ring chainring chrome ring compression ring control ring D ring D ring dykes ring fire ring … Dictionary of automotive terms
valve seat ring — A ring shaped insert of a harder metal than that of the cylinder head; the use of valve seat inserts dispenses with the need for lead in the fuel to act as a lubricant between the valve head and seat … Dictionary of automotive terms
valve hole — The hole in the rim of a wheel for mounting tubeless tires. Tubeless car tires commonly have a snap in valve consisting of a rubber molding bonded to the metal stem casing. The rubber molding has a groove formed at the base; when the valve is… … Dictionary of automotive terms
valve seat — noun : a circular ring of heat resistant bronze or steel on which a valve of an internal combustion engine rests when closed * * * valve seat, the rim of the valve port on which the valve rests when closed, made of specially hardened steel… … Useful english dictionary
ring intestinal valve — an intestinal valve with a radius lower than that of the gut so the valve is internally open and some food can pass through without coming in contact with the valve … Dictionary of ichthyology
ring — 1. A circular band surrounding a wide central opening; a r. shaped or circular structure surrounding an opening or level area. SYN: anulus [TA]. 2. The closed ( i.e., endless) chain of atoms in a cyclic compound; commonly used for “cyclic” or… … Medical dictionary
valve cover gasket — A gasket between the cylinder head and the valve cover; usually either a flat paper or cork gasket or an O ring. The British term is rocker cover gasket … Dictionary of automotive terms
valve oil seal — A neoprene rubber ring that is placed in a groove in the valve stem to prevent excess oil entering the area between the stem and the guide. There are other types of these seals … Dictionary of automotive terms
Bjork-Shiley valve — The Bjork Shiley valve is a mechanical heart valve prosthesis. Beginning in 1971, it has been used to replace the aortic or mitral valves. It marks the first example of a successfully used tilting disc valve. It was manufactured first by Shiley… … Wikipedia
mitral ring — mitral valve ring see anulus fibrosus dexter/sinister cordis … Medical dictionary
