Ball valve
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United States of America Patent
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Aug 15, 2006
Grant Date -
Dec 16, 2004
app pub date -
Jun 9, 2004
filing date -
Jun 13, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention is a ball valve which may be attached to a fluid pipe for connection/disconnection between an entrance and an exit. More particularly, the present invention is a ball valve having a discharge orifice communicating with ambient air in addition to the entrance and the exit for connection/disconnection between the entrance and the discharge orifice and/or between the exit and the discharge orifice. The ball valve of the present invention may be attached to piping systems such as, for example, the secondary side of a steam trap, which blocks steam but automatically discharges condensed water, and is used for checking a discharging state of the primary side steam trap and/or releasing remaining pressure on the secondary side.
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