Seal assembly
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United States of America Patent
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-
Jun 8, 1993
Grant Date -
N/A
app pub date -
Apr 22, 1992
filing date -
Apr 25, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sealing assembly between first and second relatively rotatable parts, such as the parts of a tunnel boring machine, in which a flange on a first part has a radial sealing face engaged by the axial faces of inner and outer sealing rings mounted on the body portion of the second part at radially spaced locations, a bleed passage in the second body portion opening between the sealing rings and indicating any failure in the outer sealing ring.
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