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US 11,441,433 B2Granted
Fan
AssigneeDelta Electronics, Inc.
InventorsChing-Hsien Yeh, Chih-Wei Chan
Life of this patent
Estimating the term…
Abstract
A fan includes a hub and a plurality of fan blades. The hub has an axle center. The fan blades are disposed around the hub. Each of the fan blades has a bent portion, and the bent portions of the fan blades are extended along a surrounding direction surrounding the axle center. The hub is welded with the bent portion of each of the fan blades along the surrounding direction. As a result, the number of fan blades is maximized, the strength is simultaneously ensured to be enough, and the advantages of effectively enhancing the fan characteristics are achieved.
Claims9
A fan, comprising:
- a hub having an axle center, an annular sidewall surrounding the axle center, and an annular protrusion portion extended from the annular sidewall;
- and
- a plurality of fan blades disposed around the hub, wherein each of the fan blades has a bent portion, and the bent portion of each of the fan blades is extended along a surrounding direction surrounding the axle center,
- wherein the hub is welded with the bent portion of each of the fan blades along the surrounding direction, and each of the bent portions of the respective fan blades is two opposite cylinders, and the two opposite cylinders are connected with the annular protrusion portion from two sides of the annular protrusion portion.
1 more element
A fan, comprising:
- a hub having an axle center;
- and
- a plurality of fan blades disposed around the hub, wherein each of the fan blades has a bent portion, a blade portion and a blade-end portion, the bent portion of each of the fan blades is extended along a surrounding direction surrounding the axle center, and the bent portion and the blade-end portion of each of the fan blades are respectively formed on two opposite ends of the blade portion of each of the fan blades,
- wherein the hub is welded with the bent portion of each of the fan blades along the surrounding direction, and
- wherein the blade-end portion has a connection end portion and a buckle part, the connection end portion is extended from the blade portion, the buckle part is perpendicular to the connection end portion, a first protrusion portion and two second protrusion portions are respectively protruded from two opposite side edges of the buckle part, a notch portion is formed between the two second protrusion portions, the notch portion and the first protrusion portion are respectively located on the same position of the two opposite side edges, and the notch portion is matched with the first protrusion portion.
2 more elements
Dependencies are inferred from the claim text.