Magnetic fluid sealing device
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United States of America Patent
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-
Mar 2, 1999
Grant Date -
N/A
app pub date -
Nov 19, 1996
filing date -
Nov 19, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A magnetic fluid sealing device for preventing magnetic fluid from flowing out or spattering under the influence of rotation of a rotatable shaft, thereby preventing contamination of the surroundings. The device includes a pole piece 1 formed with a step portion 13 whose front end surface 4 is disposed more inwardly than the proximal end surface, and the surface of the step portion 13 opposed to a magnetic body 6 serves as a barrier wall 10. Thereby, magnetic fluid 7 is prevented from flowing out or spattering into the surroundings.
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