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US 11,530,707 B2Granted
Fan
AssigneeAcer Incorporated
InventorsKuang-Hua Lin, Cheng-Wen Hsieh, Wen-Neng Liao
Life of this patent
Estimating the term…
Abstract
A fan including a hub and a plurality metal blades is provided. Each of the blades extends from the hub and is inclined relative to a radial direction of the hub. Each blade has a distal edge away from the hub, and has a pair of wingtips at the distal edge.
Claims7
A fan, comprising:
- a hub;
- and
- a plurality of metal blades respectively extending from the hub and inclined relative to a radial direction of the hub, each of the metal blades having a distal edge away from the hub and a pair of wingtips formed from the distal edge,
- wherein the distal edge of the metal blade is parallel to an axial direction of the hub, the fan is rotated about the axial direction, and the pair of wingtips of the metal blade are respectively connected to an upper edge and a lower edge of the metal blade,
- wherein the pair of wingtips are respectively raked wingtips to reduce the turbulence generated at the distal edge when the fan is rotating,
- wherein each of the metal blades further has a recess located at the distal edge, and the recess is adjacent to and between the pair of wingtips so that the pair of wingtips face each other across the recess.
3 more elements
Dependencies are inferred from the claim text.