Ball valve with a rotatable body capable of being kept out of substantial contact with a seat member
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United States of America Patent
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Aug 17, 2010
Grant Date -
Apr 24, 2008
app pub date -
Oct 4, 2007
filing date -
Oct 11, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A ball valve having a reduced sized is provided, that includes a first shaft that extends into a housing accommodating a valve body along a rotational axis of the valve body and is connected to the valve body; and a second shaft that extends into the housing to be oppositely located to the first shaft and is rotatable about an axis line, and has a pressing part that projects radially outwardly from at least a part of the outer circumference of the second shaft. The ball valve is capable of instantly and securely opening and closing communication passages, and changing the direction of fluid flow, while being capable of minimizing the wearing of a seat member for shutting off the communication passages, by having a valve body rotatable while being kept out of contact or substantial contact with the seat member.
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