Ventilation – Electronic cabinet
Reexamination Certificate
2006-03-06
2008-08-26
McAllister, Steven B. (Department: 3749)
Ventilation
Electronic cabinet
C454S259000, C454S353000, C361S689000, C361S695000
Reexamination Certificate
active
07416481
ABSTRACT:
A system, method, and apparatus for preventing exhaust backflow into a blower are disclosed. Embodiments may include a blower system with an invertible blower chassis having a blower exhaust to direct airflow from the blower chassis at an airflow angle. The system may also include a backflow damper frame attached to the blower chassis and positioned to receive airflow from the blower chassis and one or more vertical damper vanes rotatably attached to the backflow damper frame. Each damper vane may freely rotate between a first, closed position and a second, open position. The damper vanes may block airflow into the blower exhaust when in the closed position and may freely rotate to a position where the damper vanes are substantially parallel to the airflow from the blower exhaust. The damper vanes may each include a vane pin to rotatably attach to frame holes of the backflow damper frame.
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Baker Bruce E.
Henry Matthew S.
Jensen David J.
Lewis Seth D.
Byrd Cynthia S.
International Business Machines - Corporation
McAllister Steven B.
O'Reilly, III Patrick F
Schubert Osterrieder & Nickelson PLLC
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