Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Calvert Hawkes0
Date of Patent
October 12, 2010
0Patent Application Number
121319440
Date Filed
June 3, 2008
0Patent Primary Examiner
Patent abstract
A shaft seal pressure compensation system for an underwater device such a remotely operated vehicle powered by motor driven thrusters where the shaft of the motor extends from a motor housing into the surrounding water and is sealed by a shaft seal by automatically supplying air to pressurize the thrusters to balance the internal pressure of the thrusters to match the ambient water pressure. The air is supplied by a variable volume container that responsive to a pressure differential between the external ambient pressure and an internal pressure within the variable volume gas container for adjusting the volume of the variable volume gas container so that the internal pressure equals the ambient pressure, and thus balancing the system.
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