A vest for a supine human has a one-piece cover with a front panel secured to a bladder coupled to a pulsator operable to subject the vest to repeated pulses of air which applies and releases pressure to the front of the thorax of a person. The bladder has an air chamber and a bottom transverse portion...http://www.google.fr/patents/US7278978?utm_source=gb-gplus-shareBrevet US7278978 - Respiratory vest with inflatable bladder
