Metal seal ring and a method of producing the same
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United States of America Patent
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Apr 22, 1997
Grant Date -
N/A
app pub date -
Oct 17, 1995
filing date -
Oct 17, 1995
priority date (Note) -
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status (Latency Note)
Importance
Abstract
The present disclosure relates to a metal seal ring suitably used at pipe connection portions in exhaust pipe systems of automobile engines for example and a method of producing the same. The metal seal ring comprises a metal ring having a pipe-shaped cross section, and a heat-resistant composite gasket material ring filling the metal ring, wherein the composite gasket material ring is formed such that a sheet of the composite gasket material, such as a mixture of heat-resistant fiber and elastomer, a having reinforcing core material, such as a wire net and a perforated steel plate, therein, is slit to obtain a rectangular strip, that both longitudinal ends of the strip are joined to each other to form a ring, and that both fringes of the strip are butt-joined to each other to form a ring having a pipe-shaped cross section. A one-side opened metal ring having a U- or J-shaped cross section and two leg portions opened and extended nearly in parallel is filled with the composite gasket ring thus made, and then the two leg portions of the metal ring are bent so as to close the opening of the ring, thereby forming a closed pipe ring.
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