Patent ID: 8808075

Claim:
An inflatable air duct assembly comprising: a tube comprising a pliable sidewall, the pliable sidewall defining a first opening therethrough and a pair of lips extending circumferentially around the tube; and a pliable sheet to extend circumferentially at least partially around the tube to overlie the pliable sidewall, the pliable sheet comprising: a second opening that is smaller than the first opening, the pliable sheet to be selectively positionable relative to the first opening so that the second opening overlays the first opening to control the amount of airflow discharged out of the openings; and a first indicium indicative of the rate of airflow discharged out of the second opening under predefined operating conditions, the first indicium being disposed on the pliable sheet in the vicinity of the second opening; the pair of lips to hold the pliable sheet to the tube, an inner surface of the pliable sheet to be held directly against the pliable sidewall by the pair of lips interacting with an outer surface of the pliable sheet opposite the inner surface, the inner surface of the pliable sheet to contact solely the pliable sidewall.