Safety relief valve
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United States of America Patent
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Jun 7, 2005
Grant Date -
Sep 11, 2003
app pub date -
Mar 6, 2003
filing date -
Mar 7, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A safety relief valve is provided for use in association with a liquid storage tank. The safety relief valve generally includes a valve base, a valve seal plate, a hinge mechanism and a lever mechanism. The valve seal plate is pivotally coupled to the valve base by the hinge mechanism which is adapted to allow pivotal movement of the valve seal plate between a closed position and an open position. The lever mechanism is pivotally coupled to the valve base and is adapted to control the pivotal movement of the valve seal plate. In one embodiment, the hinge mechanism includes an adjustment device adapted to adjust the valve opening set point. In another embodiment, the lever mechanism includes a rod pivotally coupled to the valve base and a guide rotatably coupled to the valve seal plate, with the rod being displaceable through the guide during pivotal displacement of the valve seal plate.
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