Porpoise (scuba gear) Porpoise (scuba gear) Porpoise is a tradename for scuba developed by Ted Eldred in Australia and made there from the late 1940s onwards. The first Porpoise was a closed circuit oxygen rebreather, and the following models were all single hose open circuit regulators. This rebreather was developed by Ted Eldred in the late 1940s and early 1950s. Some were made and used for sport diving, but they did not go into full production. It was worn on the back without a casing. The bag was between the canister and valve assembly and the diver's back. It had two wide breathing
History of scuba diving to finally become the name of the company, Aqua-Lung/La Spirotechnique, currently located in Carros, near Nice. In 1948 the Cousteau-Gagnan patent was also licensed to Siebe Gorman of England, Siebe Gorman was allowed to sell in Commonwealth countries, but had difficulty in meeting the demand and the U.S. patent prevented others from making the product. This patent was circumvented by Ted Eldred of Melbourne, Australia, who had been developing a rebreather called the Porpoise. When a demonstration of this rebreather resulted in a diver passing out, he developed the single-hose open-circuit scuba system, which separates the first stage and demand