Modulating bypass control system and method
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United States of America Patent
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Feb 20, 2007
Issued Date -
N/A
app pub date -
Jan 24, 2005
filing date -
Jan 23, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A control system for a bypass duct includes a pneumatic damper control assembly, a sensor and a pneumatic switch. The damper control assembly includes a damper vane mountable in the bypass duct for movement between relative open and closed positions to regulate airflow through the bypass duct. The position of the damper vane is controllable via pressure applied through a damper control line. The sensor is mountable to the supply duct to transmit a pneumatic supply duct signal via a supply line based on at least one of air pressure or air velocity in the supply duct. Finally, the pneumatic switch opens or closes the connection between the damper control line and the supply line based on the difference between (1) the pneumatic supply duct signal via the supply line, and (2) the combination of the pneumatic pressure from the damper assembly and a switch biasing pressure.
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