Sealing device

Claim 1

A JOINT INCLUDING A PAIR OF MEMBERS TO BE SEALED TOGETHER AGAINST THE ESCAPE OF FLUID UNDER PRESSURE, MEANS OPERATIVELY CONNECTED TO SAID MEMBERS TO DRAW AND HOLD SAID MEMBERS TOGETHER, OPPOSED ANNULAR GROOVES IN SAID MEMBERS, THE WALLS OF EACH GROOVE COMPRISING INNER AND OUTER WALLS CONVERGING AT AN INCLINE RELATIVE TO THE AXIS OF THE GROOVE TO A CURVED, CONCAVE GROOVE BOTTOM, SAID GROOVES BEING COMPLEMENTARY IN SHAPE, AND THE OUTER WALL OF EACH GROOVE BEING DISPOSED AT A SUBSTANTIALLY LARGER ANGLE TO THE AXIS OF THE GROOVE THAN THE INNER WALL, A SEALING RING COMPOSED OF MALLEABLE METAL POSITIONED IN SAID GROOVES, SAID RING BEING NARROWER RADIALLY THAN SAID GROOVES AT ITS CENTRAL REGION AND HAVING NARROW, FLAT SIDE EDGES, THE CENTRAL REGION OF THE RING BEING THICKER THAN THE SIDE EDGES, THE CORNERS OF EACH OF SAID RING SIDE EDGES ENGAGING AGAINST THE SIDES OF THE RESPECTIVE GROOVE NEAR THE BOTTOM THEREOF, SAID RING HAVING A GENERALLY DELTASHAPED CROSS-SECTION WITH THE FLAT SIDE OF THE DELTA FACING THE INNER GROOVE WALLS AND THE INCLINED SIDES OF THE DELTA FACING THE OUTER GROOVE WALLS, THE RING BEING SUBSTANTIALLY WIDER AXIALLY THAN THE COMBINED DEPTHS OF SAID GROOVES, WHEREBY SAID RING CORNERS WILL BE FORMED TO THE SHAPE OF THE GROOVES WHEN SAID RING IS COMPRESSED INTO SAID GROOVES BY DRAWING SAID MEMBERS TOGETHER.