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US Patent 7757502 RAM fan system for an aircraft environmental control system

Patent 7757502 was granted and assigned to Hamilton Sundstrand on July, 2010 by the United States Patent and Trademark Office.

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Patent abstract

An environmental control system includes a RAM air fan system downstream of a respective heat exchanger in the relatively high temperature RAM exhaust. The RAM air fan includes a RAM air fan electric motor such that the RAM air fan is driven at a speed independent of an air cycle machine. A fan rotor is completely supported by hydrodynamic foil journal and thrust bearings. As the RAM air fan is driven by the RAM air fan electric motor the RAM air fan is installed in the environmental control system as a self-contained system.

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