LIQUID SEAL, SHAFT SEAL APPARATUS AND PUMP APPARATUS USING THE SAME
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United States of America Patent
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N/A
Issued Date -
Apr 26, 2012
app pub date -
Oct 20, 2011
filing date -
Oct 20, 2010
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A liquid seal has an annular lip portion and an annular fixing portion to be fixed to an inner peripheral surface of a shaft hole, in which the lip portion is connected to the fixing portion and is provided so that a tip thereof is extended in an axial direction, a spring pressing a seal lip against an outer periphery of the rotation shaft is fitted onto the lip portion. The seal lip forms a mountain shape in which an edge of the apex in the cross section, which is cut along a plane passing through a center axis of the seal, protrudes to the inner diameter side, and the pressure center of the seal lip due to the spring is disposed between the tip side of the lip portion further than the edge of the apex of the mountain of the seal lip in the axial direction.
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