Double eccentric valve
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United States of America Patent
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Jun 12, 2018
Issued Date -
N/A
app pub date -
Dec 24, 2014
filing date -
Dec 25, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A double eccentric valve includes a valve seat having a seat surface, a valve element having an annular sealing surface, and a rotary shaft having an axis parallel to a radial direction of the valve element and offset from the center of a valve hole in a radial direction thereof. The sealing surface is positioned eccentrically from the axis toward an extending direction of an axis of the valve element. The valve element rotates about the axis of the rotary shaft between a fully-closed position in which the sealing surface is in surface contact with the seat surface and a fully-open position in which the sealing surface is furthest away from the seat surface. Simultaneously with start of rotation of the valve element from the fully-closed position, the sealing surface starts to separate from the seat surface and also move along rotation path about the axis of the rotary shaft.
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