Portable device for rapidly inflating a bag

A portable device, of elongate overall shape and for rapidly inflating an inflatable bag, comprising at least one inlet intended to be connected to a source of compressed gas at high pressure, in order to allow said gas to expand into an air intake chamber, said inlet being associated with a mechanism that triggers the release of said compressed gas to said air intake chamber, the latter having an opening allowing atmospheric air to be admitted and an outlet intended to be connected to the bag that is to be inflated, the portable device further comprising an intermediate distribution chamber for said compressed gas, which chamber is arranged between said inlet and said air intake chamber in order to connect the one to the other, and a plurality of ejection holes arranged so as to open into a lateral wall of said air intake chamber in order to connect the latter to said intermediate distribution chamber.