Pipe couplings

F - Mech Eng,Light,Heat,Weapons – 16 – L

Patent

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Details

F16L 19/00 (2006.01) F16L 21/00 (2006.01) F16L 21/08 (2006.01) F16L 23/02 (2006.01)

Patent

CA 2093720

A metal fitting (11) for an end of a plain length of pipe (12) comprises a body (13) with flange means (14) adjacent a first end (15), a gland ring (16) adjacent the other end (17) of the body, a grip ring (18) between the body (13) and the gland ring (16), and screw fasteners (19) for urging the gland ring (16) towards the flange means (14); characterised in that:- the body (13) has an integral outer tubular spigot (20) projecting towards the gland ring (16) and a co-axial integral inner tubular spigot (21) having a cylindrical outer surface (22) projecting beyond the free end (23) of the outer tubular spigot (20), the inside (24) of the outer spigot (20) being provided with a frustoconical portion (25) adjacent and converging from that free end; the gland ring (16) has its inside provided with a similar frustoconical portion (26) converging in the opposite direction; and the grip ring (18) is a split ring having external surfaces (27, 28) mating with the frustoconical portions in the body (13) and the gland ring (16), and internal circumferentially disposed ribs (29) initially spaced radially from the cylindrical outer surface (22) of the inner spigot (21) by no less than the thickness (T) of a plain length of pipe (12) on one end of which the metal fitting (11) is intended to be fitted.

Cette invention concerne un raccord métallique (11) à monter au bout d'un tuyau ordinaire (12). Il est formé d'un corps (13) ayant un rebord (14) d'un côté (15), d'une bague de retenue (16) à proximité de son autre côté (17), d'une bague de serrage (18) entre le corps (13) et la bague de retenue (16) et de boulons d'assemblage (19) destinés à forcer la bague de retenue (16) vers le rebord (14) susmentionné. Le corps (13) comporte une partie saillante extérieure (20) s'avançant vers la bague de retenue (16) et une partie saillante intérieure (21) de même axe de révolution que la première et ayant une surface extérieure cylindrique (22) qui se prolonge plus loin que le bout libre (23) de la partie saillante extérieure (20) dont la face intérieure présente un amincissement (25) vers ledit bout libre (23). La bague de retenue (16) comporte une face intérieure présentant un amincissement similaire (26) vers le côté opposé tandis que la bague de serrage (18), qui est une bague fendue, présente des surfaces extérieures (27, 28) qui épousent les parties amincies du corps (13) et de la bague de retenue (16) et une surface intérieure à nervures circonférentielles (29) qui, à l'origine, sont espacées de la surface extérieure cylindrique (22) de la partie saillante intérieure (21) par au moins une distance égale à l'épaisseur (T) du tuyau ordinaire (12) destiné à recevoir le raccord métallique (11) objet de l'invention.

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