US 12,492,707 B2
Impeller with variable backsweep angle
Vishnu Sishtla, Manlius, NY (US); and Chaitanya Halbe, Liverpool, NY (US)
Assigned to CARRIER CORPORATION, Palm Beach Gardens, FL (US)
Filed by Carrier Corporation, Palm Beach Gardens, FL (US)
Filed on Feb. 18, 2025, as Appl. No. 19/056,114.
Claims priority of provisional application 63/563,535, filed on Mar. 11, 2024.
Prior Publication US 2025/0283478 A1, Sep. 11, 2025
Int. Cl. F04D 29/24 (2006.01); F01D 5/14 (2006.01); F04D 29/28 (2006.01); F04D 29/30 (2006.01)
CPC F04D 29/247 (2013.01) [F01D 5/147 (2013.01); F04D 29/284 (2013.01); F04D 29/305 (2013.01); F05D 2220/30 (2013.01); F05D 2240/24 (2013.01); F05D 2240/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An impeller for a flow device, the impeller comprising:
a hub; and
a plurality of blades, wherein each blade comprises:
an attached portion, attached to an outer surface of the hub; and
an unattached tip end portion, extending radially beyond and unattached to the outer surface of the hub,
wherein the unattached tip end portion of a blade of the plurality of blades is configured to deflect based on a rotational speed of the impeller and correspondingly adjust a backsweep angle of the blade within a predefined range, and
wherein at least part of the attached portion is curved in a direction different from a curvature of the unattached tip end portion of the blade.