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US 7,008,189 B2Granted
Centrifugal fan
AssigneeMinebea Co., Ltd.
InventorsYousef Jarrah, Desmond Riedel
Life of this patent
Estimating the term…
Abstract
A centrifugal fan and a rotor for a centrifugal fan comprising axial blades, straight blades, and a hub having a radius that increases as a function of distance from the fan inlet.
Claims9
A fan rotor comprising:
- a conical-shaped hub;
- a plurality of first blades connected to said hub, extending from a periphery of said hub to a central portion of said hub;
- a plurality of second blades connected to said hub, extending from said periphery of said hub and less than the extent of said first blades;
- and
- a ring connected to top surfaces of said first blades and said second blades at said periphery of said hub, wherein peripheral portions of said first blades and said second blades are completely disposed between said hub and said ring.
2 more elements
A fan rotor comprising:
- a conical-shaped hub;
- an axis of rotation about which said hub rotates;
- a plurality of axial blades disposed on an upper surface of said hub, said axial blades extending radially from said axis to a periphery of said hub, said axial blades having a blade angle that varies in the radial direction;
- a plurality of straight blades shorter in extent than said axial blades, and disposed at said periphery of said hub;
- and
- a ring connected to said axial blades and to said straight blades at peripheral portions thereof whereby said peripheral portions of said axial blades and of said straight blades are completely disposed between said upper surface of said hub and said ring.
3 more elements
Dependencies are inferred from the claim text.