SHEAR-PIN RELIEF VALVE
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United States of America Patent
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Issued Date -
Oct 27, 2011
app pub date -
Apr 27, 2010
filing date -
Apr 27, 2010
priority date (Note) -
Abandoned
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Abstract
A pressure relief valve that controls pressure by two features: the combination of the diameter and tensile strength of the shear pin used and the offset placement of the valve shaft relative to the center of the pallet to which it attaches. The shaft that has ends extending through the valve body to the exterior of the valve and a breaking arm attached to each end. Each arm cooperates with a pin receiver attached to the valve body to hold opposite ends of a shear pin therebetween when the valve is closed. As pressure is applied to the pallet, the breaking arms rotate and shear the web portion of the pins at a very accurate and repeatable opening pressure, allowing the pallet to open. The pins can be replaced and the valve reset without removing the valve from service. One or more shear pins may be employed.
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