Life-saving device for swimmer, has container with inert gas mixture composed of nitrogen and helium for inflating and freeing balloon for maintaining man at water surface and indicating misery of man

摘要

The device has a container with inert gas mixture (3) composed of 20 percent nitrogen and 80 percent helium for inflating and freeing a balloon (4) for maintaining a man at the water surface and indicating the misery of the man. A plastic tube (2) has a set of units and a support anchored on a support (1). The tube and the support are covered of foam.