发明名称 |
PRESSURE BALANCED SPRING LOADED OVERTRAVEL SEALING APPARATUS |
摘要 |
<p>An apparatus includes a cage and a main plug disposed in the cage. The main plug is movable between a main plug closed position and a main plug open position. A seal assembly disposed on the main plug, the seal assembly having a seal that is configured to contact the cage when the main plug is in the main plug closed position, and configured to reduce contact with the cage when a pressure differential across the seal is reduced. The apparatus includes a pressure balancing assembly movable between a closed position, an overtravel position and an open position. The pressure balancing assembly is configured to balance the pressure differential across the seal when in the overtravel and open position.</p> |
申请公布号 |
CA2833481(A1) |
申请公布日期 |
2014.05.20 |
申请号 |
CA20132833481 |
申请日期 |
2013.11.14 |
申请人 |
DRESSER, INC. |
发明人 |
CUNNINGHAM, THOMAS HENRY;WOLFE, CHRISTOPHER EDWARD;SHENG, NUO;QI, XUELE;THATTE, AZAM MIHIR;STARES, JAMES ALBERT;BOGER, HENRY WILLIAM |
分类号 |
F16K1/32;F16K39/02 |
主分类号 |
F16K1/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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