Patent ID: 8074999

Claim:
An apparatus for providing dynamic sealing arrangement for preventing leakage of a fluid along a movable shaft, comprising: a housing receiving the movable shaft therethrough, the shaft movable between an open position and a closed position; a first seal in the housing engaging the shaft; a second seal in the housing engaging the shaft in spaced relation to the first seal; a barrier sealant contained between the first and second seals; a load member adapted to pressurize the barrier sealant contained between the first and second seals: a third seal in the housing engaging the shaft in spaced relation to the second seal, the third seal being an external seal exposed to the ambient environment and wherein the first and second seals are internal seals protected from the ambient environment by the external seal; a collection area in the housing between the second and the third seals; a collection passageway in the housing connecting the collection area to an output port; and a sensor mechanism connected to the output port, the sensor mechanism adapted to sense leakage of fluid and/or barrier sealant past the second seal.