US Patent 11858387 Seat assembly

A ventilation system for a seat cushion comprises a reticulated ventilation manifold disposed in the seat cushion. The ventilation manifold has an inlet disposed adjacent a first side of the cushion and a plurality of manifold ducts extending from the inlet to terminate in outlets disposed at or near openings in a second side of the cushion. A fan motor is attached adjacent the first side of the cushion and has a fan outlet in fluid communication with the inlet of the ventilation manifold. The fan motor operates to apply a positive or a negative pressure, via the fan outlet to the ventilation manifold to supply air through the ventilation manifold and the cushion.