
Aqua-Lung, which was the first self-contained open-circuit underwater breathing system, has gained international fame and commercial success. This equipment is commonly known as the twin-hose regulator or demand valve. The basic concept of Aqua-Lung breathing apparatus is similar to that of a traditional scuba tank. The regulator is connected via a demand valle, which regulates the flow air through the lungs.
Jacques Cousteau
Jacques Cousteau & aqua lung – A fascinating story in Scuba Tech! The original Aqua lung was developed during World War II. Cousteau, a French national, developed the underwater breathing apparatus in 1943. His inspiration was Captain Yves Le Prieur's 1925 device. While the Aqua-Lung was initially a limited-functioning device, the Germans requisitioned automobile gas to use on the battlefield. Cousteau took an existing regulator and created the Aqua-Lung. He also invented the autopilot diving system.

Cousteau was instrumental in the development of scuba technology and discovered underwater archeology. In 1946, he led the first expedition using self-contained diving apparatus and recovered the Roman shipwreck Mahdia. In the following year, he converted a British minesweeper into an oceanographic research vessel. He was unable to raise funds and his passion for diving led him to write The Silent World, which became an award-winning film.
Aqua-Lung has been the most important innovation in diving. It was developed by Jacques Cousteau, in 1959. Since then it has allowed divers to freely swim under water. The Aqua-Lung is a well-known staple. Cousteau was instrumental in the development of many other tools for oceanographic research. Cousteau also invent the first underwater camera, which was invented in 1959. Cousteau's inventions revolutionized scuba dive.
Emile Gagnan
In 1945, Emile Gagagnan and Jacques Yves Cousteau patented the Aqua-Lung diving regulator. Aire Liquide was a French company that purchased the right to manufacture the regulator. It was later sold to the U.S. Divers Corporation. It was the latest development of the French CG45 regulator and was assembled in Canada. This regulator was extremely successful.
The Aqua-lung was initially called the Aqua-lung and was first sold in France in 1946. It was then brought to the United States in 1952. In 1958, Air Liquide purchased U.S. Aqua Lung America was established in 1958 by Air Liquide, which purchased U.S. Divers. Air Liquide later acquired the company and made it the largest diving company worldwide. Aqua-lung has become a major component of almost every set Scuba gear.

Emile Gagnan (France) and Jacques Cousteau (France) invented the Aqua-Lung. Both men were spy for the French Resistance during World War II. Robert Ballard kept his interest in the ocean even after the war. Emile Gagnan became his partner in crime, and he was working at L'Air Liquide as a Frenchman. They both learned how to use high pressure pneumatic design while engineers. Gagnan's concept evolved into an automated compressed-air scuba diving system called the Aqua-Lung.