US 11,946,477 B2
Compact and quiet fan
Yung Shun Chiu, Kaohsiung (TW)
Filed by Yung Shun Chiu, Kaohsiung (TW)
Filed on Mar. 4, 2023, as Appl. No. 18/117,402.
Application 18/117,402 is a division of application No. 17/100,952, filed on Nov. 23, 2020, granted, now 11,746,793.
Prior Publication US 2023/0204040 A1, Jun. 29, 2023
Int. Cl. F04D 25/06 (2006.01); F04D 29/40 (2006.01); F04D 29/52 (2006.01); F04D 19/00 (2006.01); F04D 25/08 (2006.01); F04D 29/048 (2006.01); F04D 29/32 (2006.01); F04D 29/60 (2006.01)
CPC F04D 25/0606 (2013.01) [F04D 25/06 (2013.01); F04D 29/403 (2013.01); F04D 29/526 (2013.01); F04D 19/002 (2013.01); F04D 25/08 (2013.01); F04D 29/048 (2013.01); F04D 29/325 (2013.01); F04D 29/601 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A fan comprising:
an internal annular frame;
an internal maglev assembly connected to the internal annular frame;
internal movable elements kept floating by the internal maglev assembly;
internal blades each of which comprises an end connected to a corresponding one of the internal movable elements; and
an external annular frame extending around the internal annular frame;
an external maglev assembly connected to the external annular frame;
external movable elements kept floating by the external maglev assembly;
an intermediate annular frame connected to the internal annular frame;
an intermediate maglev assembly connected to the intermediate annular frame;
intermediate movable elements kept floating by the intermediate maglev assembly; and
external blades each of which comprises an end connected to a corresponding one of the external movable elements and another end connected to a corresponding one of the intermediate movable elements.