Rotation shaft seal
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United States of America Patent
Stats
-
Feb 22, 2005
Grant Date -
Mar 27, 2003
app pub date -
Sep 23, 2002
filing date -
Sep 25, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A rotation shaft seal disposed between a housing and a rotation shaft, and provided with a seal member of rubber having a lip end portion which extends as to diminish in diameter to a fluid storing chamber side, wherein the lip end portion has a contact portion which contacts a surface of the rotation shaft and an end face which is facing the rotation shaft, and a concave portion, generating a component of force in diameter direction to raise the lip end portion outward in the diameter direction when receiving pressure in the fluid storing chamber, is formed on the end face.
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