ROTATING SCREEN FOR CENTRIFUGAL FAN
First Claim
Patent Images
1. A rotating screen for use with a centrifugal fan of an engine, the rotating screen comprising:
- a hub including a rotational axis;
a plurality of blades extending radially outwardly from the hub, each of the blades including a root adjacent the hub, a tip, a leading edge extending between the root and the tip, and a trailing edge extending between the root and the tip, the blades also including an airfoil shape; and
a band concentric with the hub and interconnecting the tips of the respective blades, wherein the leading edge is the thinnest cross-section portion of each of the plurality of blades.
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Abstract
A rotating screen, for use with a centrifugal fan of an engine, includes a hub having a rotational axis and a plurality of blades extending radially outwardly from the hub. Each of the blades includes a root adjacent the hub, a tip, a leading edge extending between the root and the tip, and a trailing edge extending between the root and the tip. The blades also include an airfoil shape. The rotating screen also includes a band concentric with the hub and interconnecting the tips of the respective blades.
20 Citations
26 Claims
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1. A rotating screen for use with a centrifugal fan of an engine, the rotating screen comprising:
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a hub including a rotational axis; a plurality of blades extending radially outwardly from the hub, each of the blades including a root adjacent the hub, a tip, a leading edge extending between the root and the tip, and a trailing edge extending between the root and the tip, the blades also including an airfoil shape; and a band concentric with the hub and interconnecting the tips of the respective blades, wherein the leading edge is the thinnest cross-section portion of each of the plurality of blades. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An engine comprising:
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a crankcase; a cover at least partially enclosing the crankcase; a centrifugal fan that is rotatable while the engine is in use for discharging a cooling airflow between the crankcase and the cover; a screen coupled for co-rotation with the centrifugal fan, the screen including a hub including a rotational axis, a plurality of blades extending radially outwardly from the hub, each of the blades including a root adjacent the hub, a tip, a sharpened leading edge extending between the root and the tip, and a trailing edge extending between the root and the tip, the blades also including an airfoil shape, and a band concentric with the hub and interconnecting the tips of the respective blades. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification