F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
F16L 19/14 (2006.01) F16L 19/065 (2006.01)
Patent
CA 2437696
A tube fitting (50) for a tube end has a female threaded member (52) that cooperated with a male threaded member (54). The female member (52) includes a tube gripping device (80) in the form of a gripping ring or ferrule that is attached to the female member by a frangible web (95). Upon a partial pull-up the ferrule engages a camming surface (88) on the male threaded member (54) and breaks off or separates from the female threaded member (52) to become a separate piece so that the fitting then functions as a single ferrule tube fitting. Additional features include a steep camming angle on the camming surface (88) to cause the ferrule (80) to grip the tube end with a bite-type action and to form a primary seal between the camming surface (88) and a front end of the separated ferrule. The ferrule front end, and optionally the entire female threaded member (52) including the initially integral tube gripping device (80), are hardened to be at least about 3.3 times harder than the material of the tube end.
L'invention porte sur un raccord pour extrémités de tube comportant un élément fileté femelle coopérant avec un élément fileté mâle. L'élément femelle comporte un dispositif de préhension du tube en forme de bague ou de virole relié à l'élément femelle par une toile frangible. Lors d'un serrage partiel, l'élément femelle entre en contact avec une surface de coincement de l'élément mâle puis se rompt et se détache de l'élément femelle pour constituer une pièce isolée, le raccord étant alors du type à bague séparée. L'angle de coincement est fortement oblique, ce qui amène la bague à serrer le tube en le mordant de manière à former un joint primaire entre la surface de coincement et la face frontale de la bague. L'extrémité frontale de la bague et facultativement l'ensemble de l'élément femelle dont le dispositif de préhension en faisant partie sont cémentés de manière à présenter une dureté d'au moins 3,3 fois celle du tube.
Bennett Mark A.
Williams Peter C.
Ridout & Maybee Llp
Swagelok Company
LandOfFree
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