US 12,188,481 C1 (13,228th)
Fan blade
Hong Li, Shenzhen (CN)
Filed by Shenzhen Ruisimai Technology Co., Ltd., Shenzhen (CN)
Assigned to SHENZHEN RUISIMAI TECHNOLOGY CO., LTD., Shenzhen (CN)
Reexamination Request No. 90/019,872, Mar. 11, 2025.
Reexamination Certificate for Patent 12,188,481, issued Jan. 7, 2025, Appl. No. 18/398,096, Dec. 27, 2023.
Claims priority of application No. 202323349361.0 (CN), filed on Dec. 7, 2023.
Ex Parte Reexamination Certificate issued on Apr. 6, 2026.
Int. Cl. F04D 29/28 (2006.01); F04D 17/00 (2006.01)
CPC F04D 29/281 (2013.01) [F04D 17/00 (2013.01)]
OG exemplary drawing
AS A RESULT OF REEXAMINATION, IT HAS BEEN DETERMINED THAT:
Claims 1-13 are cancelled.
1. A fan blade, comprising a wheel hub, a plurality of first blades and a plurality of second blades, wherein the plurality of first blades encircle an outer peripheral side of the wheel hub at an interval, a first air guide groove is formed between two adjacent first blades, and the first air guide groove is opened in an axis direction of the wheel hub to form a first air inlet;
the plurality of second blades are annularly distributed at an interval on an upper end surface of the wheel hub, a second air guide groove is formed between two adjacent second blades, and a side, away from the upper end surface of the wheel hub, of the second air guide groove is opened to form a third air inlet; and
a side, away from the wheel hub, of the first air guide groove is opened to form a first air outlet, and a side, nearer to each of the first blades, of the second air guide groove is opened to form a second air outlet.