Gasket for statically sealing high pressure and temperature fluids

Claim 1

A composite gasket for statically sealing high pressure and temperature fluids of the type having a metallic casing defining recesses in which inserts of elastic material are arranged, the gasket having two opposite parallel frontal surfaces contacting in use opposite confronting sealing surfaces between which the gasket is clamped and two lateral surface at least one of which being exposed in use to the fluid to be sealed and wherein said recesses are arranged in side by side relationship to each other and wherein according to the improvement the casing defining said recesses has an intermediate web portion extending in use perpendicular to said confronting sealing surfaces, the casing having further a first wing like portion extending perpendicular to said web portion from one end thereof and at one side thereof and adapted in use to contact one of said sealing surfaces and a second wing like portion parallel to said first wing like portion and extending at the other side of said web portion from the other end thereof and adapted in use to contact the other of said sealing surfaces, each of said first and second wing portions having an inwardly bent end portion distant from said web portion and defining an outwardly convex and inwardly concave lateral surface of said gasket thereby to leave open said recesses opposite to said first and said second wing like portion thereof respectfully and each containing said insert of elastic material arranged normally slightly to project from the opening of the respective recess and opposite with respect to the other recess, said recesses and said inserts being thereby generally of substantially rectangular shape in cross-section.