
Aqua-Lung is the first open-circuit, self-contained underwater breathing device. It has enjoyed worldwide success and fame. This equipment is often referred to as the "demand valve" or "twin-hose diving regulator". Aqua-Lung breathing apparatus functions in a manner similar to a traditional Scuba Tank. The regulator is connected with a demand valve that regulates the flow and pressure of the air into the lungs.
Jacques Cousteau
Jacques Cousteau's aqua lung - A fascinating tale in Scuba Technology! The original Aqualung was created during World War II. Cousteau, a French national developed the underwater breathing apparatus. His inspiration was Captain Yves Le Prieur's 1925 device. Although initially the Aqua-Lung could only perform limited functions, the Germans ordered automobile gas for use on the battlefield. Adapting an existing regulator, Cousteau developed the Aqua-Lung and eventually invented the autonomous diving system.

Cousteau discovered underwater archeology after advancing scuba tech. He led the first expedition to use self-contained diving equipment and recovered the Roman wreck Mahdia. He converted an old British minesweeper into a research vessel for oceanographic studies the next year. 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 was the first innovation in scubadiving. It was designed by Jacques Cousteau in 1959 and allows divers to safely and comfortably swim below water. The Aqua lung has been a popular tool, and Cousteau is responsible for the creation of many other tools that allow for oceanographic exploration. Cousteau invented the first underwater cam in 1959. Cousteau's innovations have revolutionized scuba diving.
Emile Gagnan
1945: Emile Gagnan (Jacques Yves Cousteau) and Emile Gaugnan (Emile Gagnan) patent the Aqua-Lung diving regulation. Aire Liquide (a French company) purchased the rights for the manufacture of the regulator. The U.S. later purchased the rights to manufacture it. Divers Corporation. It was the latest version of the French CG45 regulatory and was built in Canada. This regulator proved to be extremely successful.
Initially, the Aqualung (or Aqua-lung) was sold in France as the Aqua-lung. In 1952, it was imported to the U.S. In 1958, Air Liquide purchased U.S. Aqua Lung America was created by divers and purchased by Air Liquide in 1958. Air Liquide later acquired the company and made it the largest diving company worldwide. Aqua-lung today is a major component in nearly all Scuba Gear sets.

Emile Gagnan (France) and Jacques Cousteau (France) invented the Aqua-Lung. Both men were spymen for the French Resistance during World War II. Robert Ballard kept his interest in the ocean even after the war. Emile Gagnan was a Frenchman who worked for L'Air Liquide. He eventually met Emile. They learned high-pressure pneumatic design as engineers. Gagnan's concept evolved into an automated compressed-air scuba diving system called the Aqua-Lung.