Spiral gasket having a centering spring
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United States of America Patent
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-
Mar 11, 1997
Issued Date -
N/A
app pub date -
Jul 11, 1995
filing date -
Dec 28, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
A spiral gasket apparatus, capable of being held on an inclined flue gas outflow pipe without falling off therefrom, is constructed by winding a metal hoop member and a filler member, superposed on each other. A part of the hoop member from the beginning extremity of the hoop member on the inner side, which is wound as many as several turns to a welded fixed portion thereof, is raised inward by using the welded fixed portion as a fulcrum. An extremity portion thereof is folded back to form a superposition part. Since the raised part of the hoop member acts as a spring and is brought elastically into contact with an inclined flue gas outflow pipe, the gasket is held on the flue gas outflow pipe.
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