BUTTERFLY VALVE
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United States of America Patent
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-
N/A
Issued Date -
Jul 5, 2012
app pub date -
Sep 1, 2010
filing date -
Sep 7, 2009
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In a butterfly valve having: a seat ring that is mounted on the inner circumferential face of a valve body; a valve stem that passes through a through hole in the seat ring, and is supported by the valve body; and a discoid valve element that is supported by way of fixing the valve stem in a valve stem hole, and which is opened and closed as a result of the valve element turning together with the valve stem turning, a hollow cylindrical bush is inserted into the through hole in the seat ring, and is mounted in a sealed manner in a valve stem fitting hole provided in the valve element, without projecting beyond the outer circumferential face of the seat ring.
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