US 12,146,503 B2
Air circulation device
Yi-Li Huang, Apia (WS)
Assigned to REALLY USEFUL COMPANY LTD., Apia (WS)
Filed by Really Useful Company Ltd., Apia (WS)
Filed on Feb. 2, 2021, as Appl. No. 17/165,752.
Claims priority of application No. 109214010 (TW), filed on Oct. 23, 2020.
Prior Publication US 2022/0128066 A1, Apr. 28, 2022
Int. Cl. F04D 29/44 (2006.01); F04D 25/06 (2006.01); F04D 29/28 (2006.01)
CPC F04D 29/441 (2013.01) [F04D 25/06 (2013.01); F04D 29/281 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An air circulation device comprising:
an impeller including a plurality of blades that are disposed about a rotating axis and that are separably interconnected, said blades cooperatively defining an inlet that is located at a central portion of a bottom end of said impeller, a plurality of outlets that are equiangularly disposed about the rotating axis and about said inlet, and a plurality of guide channels each of which is in fluid communication with said inlet and a respective one of said outlets; and
a connecting unit fixedly interconnecting each adjacent pair of the blades;
wherein each of said blades has a lower blade body, an upper blade body, and an arc-shaped blade body that is connected between said lower blade body and said upper blade body, two opposite ends of said lower blade body of each of said blades respectively overlapping said lower blade bodies of corresponding adjacent two of said blades that are respectively adjacent to said opposite ends of said lower blade body, two opposite ends of said upper blade body of each of said blades respectively overlapping said upper blade bodies of the corresponding adjacent two of said blades that are respectively adjacent to said opposite ends of said upper blade body, said connecting unit including a plurality of first connecting members, each of said first connecting members fixedly interconnecting said upper blade bodies of a respective adjacent pair of said blades; and
wherein said upper blade body of each of said blades has a first upper overlapping section and a second upper overlapping section that are respectively at said opposite ends of said upper blade body, an upper connecting barrel that is disposed on a top surface of said first upper overlapping section, and an upper threaded post that is disposed on a top surface of said second upper overlapping section, said first upper overlapping section of each of said blades being disposed on said top surface of said second upper overlapping section of one of the corresponding adjacent two of said blades, said upper connecting barrel of each of said blades being sleeved on said upper threaded post of the one of the corresponding adjacent two of said blades, each of said first connecting members being configured as a screw, and extending through said upper connecting barrel of a respective one of said blades to threadedly engage said upper threaded post of a corresponding one of said blades.