US 12,325,510 B2
Retract actuator assemblies, landing gear assemblies and methods for kneeling landing gear assembly of aircraft
Matthew S. Elenbaas, Springfield, PA (US)
Assigned to The Boeing Company, Arlington, VA (US)
Filed by The Boeing Company, Arlington, VA (US)
Filed on Aug. 29, 2023, as Appl. No. 18/239,247.
Prior Publication US 2025/0074581 A1, Mar. 6, 2025
Int. Cl. B64C 25/58 (2006.01); B64C 25/20 (2006.01); B64C 25/22 (2006.01); F15B 15/24 (2006.01)
CPC B64C 25/20 (2013.01) [B64C 25/22 (2013.01); B64C 25/58 (2013.01); F15B 15/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A retract actuator assembly for a landing gear assembly of an aircraft, comprising:
a retract actuator, comprising:
an actuator housing defining a longitudinal axis extending through a distal end and a proximal end, the actuator housing comprising a cylinder bore along the longitudinal axis; and
a piston disposed within the cylinder bore and configured to move within the cylinder bore along the longitudinal axis, the cylinder bore defining a piston stroke within the actuator housing that defines limits for movement of the piston, the piston stroke comprising an extended piston position relating to the distal end of the actuator housing and a retracted piston position relating to the proximal end of the actuator housing; and
a kneel stop assembly secured to an exterior surface of the actuator housing in relation to the extended piston position within the cylinder bore and the retracted piston position within the cylinder bore, the kneel stop assembly configured to selectively establish a kneel stop position within the cylinder bore to reduce the piston stroke by inhibiting movement of the piston to the retracted piston position.