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US 2004/0175270 A1Published application
High-flow low torque fan
AssigneeSiemens VDO Automotive Corporation
InventorsBrian Havel, Bonifacio Castillo
Life of this patent
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Abstract
A fan 10 includes a hub 12, a plurality of fan blades 14 attached to the hub at one end and extending outwardly from the hub, and a ring 18 concentric with the hub and coupled to tips 16 of the blades. A dimensionless radius (r/R) is defined from a center of the hub (r/R=0) radially outwardly, wherein each tip of the blades is r/R=1. A pitch ratio increases up to about r/R=0.85, and decreases in a range of about 0.85<r/R<1.0. In the range of about 0.6<r/R<1.0, a chord length decreases continually.
Claims6
A fan comprising:
- a hub,
- a plurality of fan blades attached to the hub at one end and extending outwardly from the hub, and
- a ring concentric with the hub and coupled to tips of the blades,
- wherein a dimensionless radius (r/R) is defined from a center of the hub (r/R=0) radially outwardly, wherein each tip of the blades is r/R=1,
- wherein a pitch ratio increases up to about r/R=0.85, and decreases in a range of about 0.85<r/R<1.0, and
- wherein, in the range of about 0.6<r/R<1.0, a chord length decreases continually.
3 more elements
A fan comprising:
- a hub,
- a plurality of fan blades attached to the hub at one end and extending outwardly from the hub, and
- a ring concentric with the hub and coupled to tips of the blades, the fan defined generally by:
- 2 Pitch Ratio/ r/R Average Pitch Ratio Chord Length/Average Chord Length 0.369 0.796 1.120 0.433 0.842 1.125 0.496 0.894 1.118 0.559 0.948 1.095 0.623 1.000 1.059 0.685 1.050 1.022 0.748 1.099 0.976 0.811 1.127 0.927 0.874 1.131 0.884 0.934 1.094 0.850 1.000 1.020 0.822
- wherein (r/R) is a dimensionless radius defined from a center of the hub (r/R=0) radially outwardly, wherein each tip of the blades is r/R=1.
2 more elements
Dependencies are inferred from the claim text.