Automatic and instantaneous inflating device

An automatic and instantaneous inflating device comprising an inflatable neck float, with a U shape that is placed around the neck and closes with a safety closure, allowing a tight fit, a synthetic non-inflammable gas, used to inflate the neck float around the subject's neck, this gas is introduced in a liquid state and upon being suddenly released, will expand and inflate the lifesaving neck float and a flexible tube placed inside the neck float that will carry the gas;

• and where the flexible tube, has a resistance of at least 12 bars and capacity to resist at least 20 bars and has circular closures on each of its ends wherein one of the circular closures is constituted by a pressure valve and gas inlet (4) and on the opposite end the closure is constituted by a resistant polyethylene membrane (5) which has on its exterior face a small nichrome wire (6) of a diameter between 2 mm and 4 mm.