Device for constraining actuator motion during a dynamic event

A passenger seat assembly, comprising:

• a seat pan including a seat pan frame member;
• a seat back including a seat back frame member;
• a linear actuator comprising a shaft, the linear actuator having a first end attached to the seat pan frame member and a second end attached to the seat back frame member, wherein the seat back is rotatable relative to the seat pan using the linear actuator;
• and
• a motion control device for controlling plastic deformation of the shaft during a dynamic event exceeding a predetermined threshold, the motion control device comprising:
• a first part attached to the seat pan frame member, the first part comprising a mechanical stop and a first clip;
• and
• a second part mounted on the shaft proximal to the first end of the actuator, the second part comprising a second clip;
• wherein, during the dynamic event exceeding the predetermined threshold, the mechanical stop is configured to constrain rotational motion of the shaft in a first direction and the first and second clips are configured to engage to momentarily constrain rotational motion of the shaft in a second direction opposite the first direction.

A motion control device for controlling plastic deformation of an actuator shaft during a dynamic event exceeding a predetermined threshold, the motion control device comprising:

• a first part attachable to a seat pan, the first part comprising a mechanical stop and a first clip;
• and
• a second part mountable on the actuator shaft, the second part comprising a second clip;
• wherein, during the dynamic event exceeding the predetermined threshold, the mechanical stop is configured to constrain rotational motion of the actuator shaft in a first direction, rotational motion of the actuator shaft in the first directions readies the first and second clips foe engagement, and the first and second clips engage to momentarily constrain rotational motion of the shaft in a second direction opposite the first direction.