Blower impeller apparatus with pivotable blades
AssigneeHewlett-Packard Development Company, L.P.
InventorsJames J. deBlanc, David M. Dickey, Victoria Tsang Tam
Life of this patent
Estimating the term…
Abstract
Blower designs for vented enclosures include an impeller having a plurality of blades. The impeller includes a plurality of blades pivotably coupled to an impeller body. The blades pivot to enable operation in one of a closed and an open state. Air flow between blades is substantially restricted when the blades are in the closed state. Air flow between the blades is permitted when the blades are in an open state. In one embodiment, the pivotable couplings are spring loaded to maintain the blades in the closed state when the impeller rotational speed is below a threshold range. The blades pivot to the open state when the rotational speed exceeds the threshold range.
Claims18
An apparatus comprising:
- an enclosure having at least one vent;
- and
- a plurality of blowers for exchanging air between the interior and the exterior of the enclosure in co-operation with the vent, wherein each blower comprises an impeller having pivotable blades permitting substantially no reverse air flow through the blower when the rotational speed of the impeller falls below a threshold range.
An apparatus comprising:
- an enclosure having a plurality of interfaces for exchanging air between the interior and exterior of the enclosure;
- and
- a plurality of blowers each residing at an associated one of the plurality of interfaces, wherein each blower comprises an impeller having pivotable blades permitting substantially no reverse air flow through its associated interface when a rotational speed of the impeller falls below a threshold range.
An apparatus comprising:
- an enclosure having at least one vent and a plurality of interfaces for exchanging air between the interior and exterior of the enclosure;
- and
- a plurality of blowers each residing at an associated one of the plurality of interfaces, wherein each blower comprises an impeller having pivotable blades permitting substantially no reverse air flow through its associated interface when a rotational speed of the impeller falls below a threshold range.
Dependencies are inferred from the claim text.