Seat assembly including an armrest sub-assembly and method for fabricating the same

A seat assembly comprising:

• a seat frame comprising a seat base structure portion and a seat backrest structure portion that is configured to extend substantially upright from the seat base structure portion;
• a seat base portion comprising a seat base cushion supported by the seat base structure portion;
• a seat backrest portion comprising a seat backrest cushion supported by the seat backrest structure portion;
• and
• an armrest sub-assembly configured to move between a stowed position that is substantially within the seat backrest portion and an extended position that is forward of the seat backrest portion, wherein at least a portion of the armrest sub-assembly translates substantially linearly along an incline that is at an angle of from 20 to 80° relative to the seat base portion and that is forward of the seat backrest portion during movement from the stowed position towards the extended position, the arm rest sub-assembly comprising:
• a fixed guide structure arrangement that comprises a fixed track portion, the fixed guide structure arrangement is coupled to the seat frame proximate a lower section of the seat backrest structure portion and extends along an incline relative to the seat base portion;
• a movable guide extension structure has a body portion, the moveable guide extension structure is slidingly coupled to the fixed guide structure arrangement to translate along the incline;
• and
• an armrest portion having a distal forward-facing outer surface, wherein the armrest portion is coupled to the movable guide extension structure to facilitate moving the armrest portion from the stowed position towards the extended position, and wherein in the stowed position the distal forward-facing outer surface of the armrest portion is aligned with adjacent outer surface portions of the seat backrest cushion, and in the extended position the armrest portion is forward of the seat backrest cushion.