Patent ID: 11946483
Assignee: ACER INCORPORATED
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
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.