Improved valve for gas systems

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

Patent

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F16K 5/06 (2006.01) F16B 41/00 (2006.01) F16K 35/00 (2006.01)

Patent

CA 2401774

An improved ball valve (1), in particular for gas systems, comprises a tampering indicating seal (25) made by in- jection molding a synthetic or metal material into cavities (19; 21; 22) formed in the screw-clamping nut assembly (11, 13) and including a cap outer portion (29) which substantially covers the surface of the outer face of the nut (13) and/or extending (29A) on the side surface of said nut (13).

L'invention concerne un clapet à bille amélioré (1), servant notamment à équiper des systèmes au gaz, qui comprend une bague inviolable (25) réalisée par moulage par injection d'un matériau synthétique ou métallique dans des cavités (19, 21, 22). La bague inviolable est formée dans l'ensemble écrou à griffes de serrage (11, 13) et comprend une partie extérieure de couronnement (29) couvrant sensiblement la surface de la face extérieure de l'écrou (13) et/ou s'étend (29A) sur la surface latérale dudit écrou (13).

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