Wenderoth, Lind & Ponack
Air mat apparatus
 In an air mat apparatus comprising a mat body having a plurality of defined air chambers, there is an air source for feeding air to each of the air chambers of the mat body and a changeover valve connected between the mat body and the air source for controlling the air feed from the air source to each of air chambers. An air-containing elastic layer is laid on the upper surface of the mat body. The air-containing elastic layer has such an elasticity and is provided with numerous voids which can suck air into the inside and which are open to the outer air so that the air-containing elastic layer is made to discharge and suck air when the air chambers are inflated and deflated whereby compulsory ventilation is achieved between the mat body and the body surface of the user. The present invention relates to an air mat apparatus which is mainly laid on a bed or chair or wound round a hand or leg in order to promote the blood circulation of the body surface to prevent bedsores or to massage the waist, back, hand, leg or the like. 
Seiken Co., Ltd.
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Masatoshi
Takeuchi