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Aqualung, Aqua-Lung, and Aqua Lung are registered trademarks for scuba diving breathing equipment. That trade name was originally owned in the United States by a company known as U.S. Divers (that later became Aqualung America). The term was in use before the trademark was registered by René Bussoz, who owned a sporting goods store called ...
The "Aqua-Lung" regulator was created by Jacques-Yves Cousteau and Émile Gagnan in 1943. [5]In 1946, the company known as La Spirotechnique (now Aqua Lung International) was established by both men together with Jean Delorme, CEO of Air Liquide, as a division of Air Liquide to sell the Aqua-Lung regulators.
Draeger twin hose two stage demand regulator. The most striking and well recognized example of vintage scuba gear is the twin-hose or double hose regulator, a popular style of regulator in the early years of scuba diving, since Jacques-Yves Cousteau and Emile Gagnan pioneered the first such design, the C45 Scaphandre Autonome, which was marketed in the USA (along with a tank and harness) as ...
Émile Gagnan. Émile Gagnan (1900 – 1984) was a French engineer and, in 1943, co-inventor with French Navy diver Jacques-Yves Cousteau of the Aqua-Lung, the diving regulator (a.k.a. demand-valve) used for the first Scuba equipment. [1]
In Britain the word "aqualung" became a generic trademark for open-circuit underwater breathing sets and remained so for many years. The word "scuba" became the generic word quickly in the US and eventually in Britain. For more information see Aqua-lung#Trademark issues. From 1946 to 1955 La Spirotechnique sold only one model of regulator, the ...
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It is well known that in waters colder than 10 °C (50 °F) use of a regulator to inflate a lift bag, or to purge a regulator underwater for just a few seconds, will start many regulators free-flowing and they will not stop until the air supply to the regulator is stopped. Some cold water scuba divers install shuttle (slide operation) type shut ...
In flexible bag weights, the small pieces of lead shot will rub together when handled and used, releasing lead dust and corrosion products into the water. [32] The amount of lead lost to the water is roughly proportional to the total surface area of the weights, and the amount of motion between contact surfaces and is greater for smaller sizes ...
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