Mechanical seal
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United States of America Patent
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Jun 17, 2014
Grant Date -
Apr 26, 2012
app pub date -
Mar 16, 2010
filing date -
Mar 16, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A mechanical seal is disclosed having a rotatable sealing face and a stationary sealing face that are in opposed relation and arranged to be urged, into contact to form a seal. One of the sealing faces is mounted on a support assembly that includes a biasing device operative to move that sealing face into contact with the other sealing face. In one form of the invention, the biasing device includes one or more resilient members that in use are deformed to provide the biasing force. In a second form of the invention, the support assembly forms part of a fluid barrier of the seal and the biasing device is fluid impervious and forms part of the barrier. In a third form of the invention, the biasing device is exposed to fluid pressure in the chamber and the biasing force increases on increasing the fluid pressure in the chamber.
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