US 12,258,140 B2
Propulsor brake lock
Ronald Vaughan, Tempe, AZ (US); James N. Quitmeyer, Tempe, AZ (US); and Everett Canepa, Phoenix, AZ (US)
Assigned to HONEYWELL INTERNATIONAL INC., Charlotte, NC (US)
Filed by HONEYWELL INTERNATIONAL INC., Charlotte, NC (US)
Filed on May 2, 2023, as Appl. No. 18/310,679.
Claims priority of provisional application 63/486,073, filed on Feb. 21, 2023.
Prior Publication US 2024/0278923 A1, Aug. 22, 2024
Int. Cl. B64D 31/14 (2006.01); B64C 11/00 (2006.01); B64D 27/30 (2024.01); B64D 31/08 (2006.01); B64D 35/08 (2006.01)
CPC B64D 31/08 (2013.01) [B64C 11/002 (2013.01); B64D 27/30 (2024.01); B64D 31/14 (2013.01); B64D 35/08 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A propulsor brake lock system, comprising:
an aircraft propulsor including a propeller having a propeller input shaft coupled thereto;
a reduction gear assembly including at least an input gear and an output gear, the input gear and output gear rotatable with the propeller input shaft;
a brake shaft coupled to, and rotatable with, the output gear; and
a brake assembly coupled to the brake shaft, the brake assembly moveable between a disengaged position, in which the brake shaft may rotate whenever the output gear rotates, and an engaged position, in which the brake shaft is prevented from rotating, thereby preventing rotation of the output gear, the input gear, and the propeller input shaft,
wherein:
the brake assembly is a bi-stable brake assembly that is adapted to receive an electrical pulse and is configured such that: (i) when the brake assembly is in the disengaged position, upon receipt of the electrical pulse, the brake assembly moves from the disengaged position to the engaged position, and (ii) when the brake assembly is in the engaged position, upon receipt of the electrical pulse, the brake assembly moves from the engaged position to the disengaged position,
the bi-stable brake assembly is a dual-channel brake, and
each channel is adapted to selectively receive the electrical pulse.