US 11,946,483 B2
Fan
Jau-Han Ke, New Taipei (TW); Tsung-Ting Chen, New Taipei (TW); Chun-Chieh Wang, New Taipei (TW); Yu-Ming Lin, New Taipei (TW); Cheng-Wen Hsieh, New Taipei (TW); and Wen-Neng Liao, New Taipei (TW)
Assigned to ACER INCORPORATED, New Taipei (TW)
Filed by Acer Incorporated, New Taipei (TW)
Filed on May 17, 2023, as Appl. No. 18/318,852.
Claims priority of application No. 111119215 (TW), filed on May 24, 2022.
Prior Publication US 2023/0383762 A1, Nov. 30, 2023
Int. Cl. F04D 29/66 (2006.01); F04D 17/10 (2006.01); F04D 29/28 (2006.01); F04D 29/42 (2006.01)
CPC F04D 29/281 (2013.01) [F04D 17/10 (2013.01); F04D 29/4226 (2013.01); F04D 29/666 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A fan, comprising:
a housing, comprising a top case and a bottom case;
a hub, rotatably disposed between the top case and the bottom case in an axial direction; and
a plurality of blades, extending from the hub in a radial direction, and located between the top case and the bottom case, wherein each of the blades includes:
a proximal end connected to the hub; and
a distal end that is opposite from the proximal end, located at the other side of the blade, and having recessed portions, wherein each of the recessed portions forms a passage for air;
wherein the recessed portions include:
a first recessed portion, forming a first passage for air, having a first air entrance and a first air exit that are aligned in a first direction; and
a second recessed portion, forming a second passage for air, having a second air entrance and a second air exit that are aligned in a second direction;
wherein the first direction and the second direction are different.