Ventilation – Having inlet airway – With adjustable valve
Reexamination Certificate
2006-06-19
2009-08-25
Jules, Frantz F (Department: 3744)
Ventilation
Having inlet airway
With adjustable valve
C454S228000, C454S261000, C454S333000, C454S358000, C454S259000, C236S049100, C236S049500
Reexamination Certificate
active
07578734
ABSTRACT:
An HVAC unit ventilator, particularly suited for schools and hotels, includes a single damper blade driven directly by a motor to control a supply air's mixture of return air and outside air. The damper blade is selectively pivotal to a full outside air position, a full return air position, and various intermediate mixed-air positions. The damper blade has flexible edge and end seals that create little if any frictional drag as the damper blade pivots to the intermediate positions, yet the seals provide a positive, tight seal when the damper stops at either the full outside air position or the full return air position. The unit ventilator includes a filter frame that not only supports an air filter but also provides the damper blade with sealing surfaces and structural support. For rigidity, the damper blade has somewhat of a box-like structure that is bi-directionally reinforced by ribs and triangular gussets.
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Ahmed Syed S.
Beason Kirk W.
Hall Kim L.
Herzog Bryan M.
Sawyer Kevin W.
Comings Daniel C
Jules Frantz F
O'Driscoll William
Trane International Inc.
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