Air check valve system and method of mounting same
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United States of America Patent
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Apr 4, 2017
Grant Date -
Jul 28, 2011
app pub date -
Jan 14, 2011
filing date -
Jan 26, 2010
priority date (Note) -
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Abstract
An air check valve system configured to be mounted for fluid communication with a fan can include a ring having a generally circular inner diameter that defines an air passage through a plane of the ring. A first and a second flange can extend from the ring. A rod can have a first end mounted to the first flange and a second end mounted to the second flange. The rod can define a pivot axis. A first and a second damper plate can be mounted to the rod for rotation around the pivot axis between an open and a closed position.
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