Hollow metal sealing rings
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United States of America Patent
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-
Oct 11, 1994
Issued Date -
N/A
app pub date -
Jan 18, 1994
filing date -
Dec 19, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
According to a first aspect of the invention a metal sealing ring has a hollow cross section which is open at its radially innermost side and has limbs generally directed towards the radially innermost side. The radially outermost region of the cross section is provided with reinforcement so as to locally increase its hoop strength. According to a second aspect of the invention, a hollow self-energising metal sealing ring and a seating for the sealing ring are provided with complimentary radial cross sectional shapes which cooperate to limit the rotation of the sealing ring cross section when axially compressed. As can be seen in FIG. 11, the surfaces 45 are tangential to the convex arcuate contact lines C, in the relaxed state of the seal ring. During compression these surfaces remain substantially tangential to the regions C, as the limbs flex.
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