Pressure relief system with clutch activated valve
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United States of America Patent
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Nov 25, 2003
Grant Date -
Aug 14, 2003
app pub date -
Feb 8, 2002
filing date -
Feb 8, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pressure relief system for detecting and correcting an overpressure situation in a pressurized fluid. The system includes a pressure responsive member such as a buckling pin configured to mechanically collapse when a predetermined force is applied to the member. An actuator assembly axially compresses the member in response to the pressure of the fluid and rotates a first shaft upon mechanical collapse of the member. A bypass valve assembly establishes a bypass path for the fluid upon rotation of a second shaft. A clutch mechanism decouples the first and second shafts prior to and during initial stages of mechanical collapse of the member and subsequently couples the first and second shafts during remaining stages of mechanical collapse of the member. In this way, forces associated with the bypass valve assembly are isolated from the actuator assembly during steady state operation and during the initial stages of mechanical collapse.
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