Indicating instrument with migration barriers
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United States of America Patent
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Feb 6, 2001
Issued Date -
N/A
app pub date -
Sep 3, 1998
filing date -
Dec 20, 1996
priority date (Note) -
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Abstract
Moving magnet indicating instruments in which a damping fluid migration barrier projects from the inside of one wall of the bobbin coil and another damping fluid migration barrier projects from the face of the rotor which confronts that wall. Certain fluids have a tendency to migrate, or 'creep,' over surfaces they contact. The fluid migration barriers of the present invention prevent unwanted migration of fluid out of a cavity by providing a sharp peak over which the fluid cannot creep.
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