Shaft seal device and pump apparatus using the same
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United States of America Patent
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-
Mar 29, 2016
Grant Date -
Mar 28, 2013
app pub date -
Sep 27, 2012
filing date -
Sep 27, 2011
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A shaft seal device includes: a rotary shaft; a seal member that is arranged on an outer periphery of the rotary shaft; a liquid chamber; and a seal member accommodation chamber that accommodates the seal member therein, wherein the liquid chamber and the seal member accommodation chamber is separated by a partition wall, wherein the rotary shaft passes through a shaft hole formed in the partition wall and an outer periphery of the rotary shaft is sealed by the seal member, wherein the partition wall is formed with a through-hole penetrating the partition wall, a hollow member is mounted in the through-hole, a protrusion part of the hollow member protrudes toward the seal member accommodation chamber to engage with the seal member, and wherein the liquid chamber and the seal member accommodation chamber communicate with each other through a hole of the hollow member.
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