Patent ID: 6923177

Claim:
An underwater breathing device comprising a carrier in the form of a closable bag, said closable bag being made from a material that has elastic properties; straps for securely attaching said carrier to the back of a diver; a rigid baseboard that is located within said carrier and connected to the region thereof that in use is disposed adjacent the back of said diver; a pressurized gas reservoir, said reservoir being connected horizontally to a lower part of said baseboard; a buoyancy bladder, said buoyancy bladder being positioned above said gas reservoir within said carrier; bladder control means operatively coupling said buoyancy bladder to said gas reservoir so that said buoyancy bladder may be inflated and deflated; and, a breathing regulator in communication with said gas reservoir to permit breathing of contained gas by said diver; wherein the carrier wholly contains the buoyancy bladder the gas reservoir, and the rigid baseboard, and the bag can stretch and contract to accommodate changes in the volume of the buoyancy bladder in use.