Method of manufacturing a spherical pigging device
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United States of America Patent
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May 28, 1996
Issued Date -
N/A
app pub date -
Aug 18, 1995
filing date -
Jul 14, 1994
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of manufacturing a spherical pigging device for passing through a pipeline by forming a water soluble spherical core, affixing numerous magnets to the surface of the core, suspending the core within a spherical mold, pouring a liquid between the mold and the core that will cure to form a spherical body, removing the spherical body and dissolving the core to leave a hollow spherical body with the magnets encased within it.
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Cited Art Landscape
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