US 12,110,904 B2
Fans
Remy Marcel Sydney Bourcier, New South Wales (AU)
Assigned to Minetek Investments Pty Ltd, Sydney (AU)
Filed by MINETEK INVESTMENTS PTY LTD, Sydney (AU)
Filed on Apr. 11, 2023, as Appl. No. 18/133,404.
Application 18/133,404 is a continuation of application No. 16/488,569, granted, now 11,649,833, previously published as PCT/AU2018/050146, filed on Feb. 22, 2018.
Claims priority of application No. 2017900608 (AU), filed on Feb. 23, 2017.
Prior Publication US 2023/0243366 A1, Aug. 3, 2023
Int. Cl. F04D 29/38 (2006.01); F04D 29/52 (2006.01)
CPC F04D 29/384 (2013.01) [F04D 29/52 (2013.01)] 38 Claims
OG exemplary drawing
 
1. A fan arrangement for a duct, the fan arrangement including a housing having an inlet and an outlet adapted to communicate air with the duct and an axially rotatably driven impeller supported within the housing between the inlet and the outlet, the impeller including a hub carrying a plurality of blades that span in a radial direction outwardly of the hub, the plurality of blades being shaped to urge air between the inlet and the outlet,
wherein the plurality of blades have a tip solidity ratio in the range of about 0.8 to 1.55, and
wherein each of the plurality of blades has a twist angle between a root and a tip thereof in the range of about 15 to 30 degrees and a substantially constant thickness across a chord thereof, and
wherein, when viewed in front plan form, leading edges and trailing edges of adjacent ones of the plurality of blades are parallel in a radial direction.