Lifejacket inflated by gas cartridge attached to one of its walls has ring designed so that when it is inflated its front, middle and back zones have equal volume, maintaining user in stable position in water

摘要

The lifejacket (1) is inflated by a gas cartridge (6) attached to one of its walls. The ring (5) of the jacket is designed so that when it is inflated the front (Z3), middle (Z2) and back (Z1) zones have an equal volume which maintains the user in a stable position in the water.