US 12,434,821 B2
Pivoting landing gear provided with an immobilization system
Roland Becquet, Meyreuil (FR)
Assigned to AIRBUS HELICOPTERS, Marignane (FR)
Filed by AIRBUS HELICOPTERS, Marignane (FR)
Filed on Apr. 15, 2024, as Appl. No. 18/635,450.
Claims priority of application No. 2307363 (FR), filed on Jul. 10, 2023.
Prior Publication US 2025/0019068 A1, Jan. 16, 2025
Int. Cl. B64C 25/34 (2006.01); B64C 25/32 (2006.01)
CPC B64C 25/34 (2013.01) [B64C 2025/325 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A landing gear, the landing gear comprising:
a stand and a pivoting assembly, the pivoting assembly carrying a contact member configured to be in contact with the ground, the pivoting assembly being able to rotate about a pivot axis in relation to the stand, the landing gear having an immobilization system, the immobilization system comprising:
a movable pin and a control configured to request the application of a locked mode or an unlocked mode;
a passage, the pin being outside the passage in an unlocked phase of the unlocked mode, the pin being able to move in the passage in azimuth relative to the pivot axis in a locked phase of the locked mode;
an elastic locking system pushing the pin, when in the locked mode, either against a base during an armed phase of the locked mode as long as the pin does not enter the passage, or into the passage as soon as the pin is in line with the passage in the locked phase;
an elastic unlocking system configured to move the pin out of the passage when activation of the unlocked mode is commanded by the control, wherein the passage is provided in the base secured to the pivoting assembly, the elastic unlocking system being calibrated to allow the pin to be extracted from the passage only when there is a shearing force between the base and the pin less than a threshold.