Patent ID: 7543759

Claim:
A multi-valve damper for an airflow duct, comprising: a plug body having a proximal end and a distal end, said plug body adapted to separate said duct section into at least two airflow sections and to act as a pitot tube having a total pressure chamber and a pitot chamber; and at least two damper blades mounted on said distal end of said plug body, each of said damper blades controlling airflow in a respective airflow section; wherein; at least one of said proximal end and said distal end of said plug body has an aerodynamic shape; said proximal end of said plug body is adapted to form said total pressure chamber for measuring air velocity pressure in the airflow duct; and a central section of said plug body between said proximal end and said distal end is adapted to form said pitot chamber for measuring air velocity pressure in at least one of said airflow sections.