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US 9,518,585 B2Granted
Fan
AssigneeLG Electronics Inc.
InventorsSeokho Choi, Yongcheol Sa
Life of this patent
Estimating the term…
Abstract
Provided is a fan. The fan includes a hub and a blade extending from the hub. The blade includes a blade rear end having a predetermined curvature and a blade side end connected to the blade rear end. The blade rear end includes ridge parts protruding in a predetermined direction from an extension and furrow parts protruding in a direction opposite to the predetermined direction.
Claims8
A fan, comprising:
- a hub;
- and
- a plurality of blades that extends from the hub, each of the plurality of blades including a positive-pressure surface and a negative-pressure surface opposite to the positive-pressure surface, wherein each of the plurality of blades includes a blade rear end having a predetermined curvature and a blade side end connected to die blade rear end, wherein the blade rear end includes an alternating pattern of ridges and grooves, the pattern extending along an edge of the blade rear end, wherein the ridges protrude different lengths from the positive-pressure surface and the grooves protrude different lengths from the negative-pressure surface, and wherein the ridges and the grooves have square ends.
A fan, comprising:
- a hub;
- and
- a plurality of blades that extends from the hub, each of the plurality of blades including a positive-pressure surface and a negative-pressure surface opposite to the positive-pressure surface, wherein each of the plurality of blades includes a blade rear end having a predetermined curvature and a blade side end connected to the blade rear end, wherein the blade rear end includes an alternating pattern of ridges and grooves, the pattern extending along an edge of the blade rear end, wherein the ridges protrude different lengths from the positive-pressure surface and the grooves protrude different lengths from the negative-pressure surface, wherein the alternating pattern includes:
- a first connection portion that extends from a first upper end of the pattern to a first lower end of the pattern being next to the first upper end;
- and
- a second connection portion that extends from a second upper end of the pattern being next to the first upper end to the first lower end of the pattern, wherein the first lower end has a width between the first connection portion and the second connection portion, and wherein the ridges and the grooves have square ends.
3 more elements
A fan, comprising:
- a hub;
- and
- a plurality of blades that extends from the hub, each of the plurality of blades having a positive-pressure surface and a negative-pressure surface opposite to the positive-pressure surface, wherein each of the plurality of blades includes a blade rear end having a predetermined curvature and a blade side end connected to the blade rear end, wherein the blade rear end includes:
- an extension, which is an imaginary line connected from a first point at which the hub and the blade rear end meet to a second point at which the blade side end and the blade rear end meet;
- and
- an alternating pattern of ridges and grooves, the pattern extending along the extension, wherein the ridges protrude different lengths from the positive-pressure surface and the grooves protrude different lengths from the negative-pressure surface, and wherein the ridges and the grooves have square ends.
3 more elements
Dependencies are inferred from the claim text.