F - Mech Eng,Light,Heat,Weapons – 16 – L
Patent
F - Mech Eng,Light,Heat,Weapons
16
L
285/56
F16L 23/00 (2006.01) F16L 19/02 (2006.01) F16L 19/025 (2006.01) F16L 23/02 (2006.01) F16L 23/20 (2006.01)
Patent
CA 1110292
PATENT APPLICATION of DAVID J. HARRA and WILLIAM C. NYSTROM for FLANGE SEALING JOINT WITH REMOVABLE METAL GASKET Abstract An all-metal joint is provided wherein a metal gasket disposed between mating flanges can readily be removed when the joint is disassembled. Opposing faces of the mating flanges are configured to provide a recess between the flanges in which a soft metal gasket of annular con- figuration can be received when the flanges are coupled together. Symmetrically disposed ridges on the opposing flange faces penetrate into a peripheral region of the gasket, thereby causing a portion of the gasket material to flow into an annular groove that forms the periphery of the recess between the opposing flange faces. This compressed flange material in the annular groove provides a gas-tight seal between the mating flanges. The configu- ration of the opposing flange faces is such that when the joint is disassembled, the net force tending to retain the gasket in position against either one of the flange faces is minimized. In particular, each flange face is configured so that the residual compressive forces present when the flange coupling mechanism is released, distributed over the surface of the gasket, are in net effect substantially equal to or greater than the frictional and bonding forces that might tend to retain the gasket in contact with either flange. In this way, the gasket tends to break away from the mating flange faces when the joint is disassembled. - 1 -
341074
Harra David J.
Nystrom William C.
Gowling Lafleur Henderson Llp
Varian Associates Inc.
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