US 12,241,476 B2
Cooling fan assembly
Tom De Lathauwer, Lede (BE)
Assigned to CNH Industrial Belgium N.V., Zedelgem (BE)
Filed by CNH Industrial Belgium N.V., Zedelgem (BE)
Filed on Apr. 22, 2024, as Appl. No. 18/641,549.
Claims priority of application No. 23169287 (EP), filed on Apr. 21, 2023.
Prior Publication US 2024/0352943 A1, Oct. 24, 2024
Int. Cl. F04D 29/063 (2006.01); F04D 29/32 (2006.01); F04D 29/36 (2006.01); F04D 29/38 (2006.01); A01D 41/12 (2006.01)
CPC F04D 29/362 (2013.01) [F04D 29/329 (2013.01); F04D 29/384 (2013.01); A01D 41/12 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A cooling fan assembly comprising:
a support structure;
a plurality of cooling fans, each fan comprising:
(i) an axle that is rotatable with respect to the support structure;
(ii) a hub that is uniform with or fixed to the axle;
(iii) blades extending outward radially with respect to the hub, wherein a pitch of the blades is adjustable by pivoting the blades about respective radial axes;
(iv) a mechanism mounted in the hub, for simultaneously adjusting the pitch of the blades; and
(v) a positioning rod oriented and movable in an axial direction of the fan, partially extending out of the hub, and coupled to the mechanism in such a way that an axial position of the positioning rod determines the pitch of the blades of the fan;
an actuator;
a control member that is movable relative to the support structure, and that is furthermore coupled to the actuator, so that the actuator is configured to drive a movement of the control member; and
a plurality of adjustment mechanisms, one for each fan, wherein each of the plurality of adjustment mechanisms is coupled to the positioning rod of a respective one of the plurality of cooling fans and to the control member, in such a way that movement of the control member simultaneously sets the axial position of each positioning rod and thereby the pitches of the blades of the plurality of cooling fans.