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  2. Self-contained breathing apparatus - Wikipedia

    en.wikipedia.org/wiki/Self-contained_breathing...

    Paul Hashagan also notes that, in 1863, A. Lacour developed and patented the "improved breathing apparatus". This system provided air to the wearer from two canvas and rubber balloon-like bags which were carried on the wearer's back. A pair of bellows would then allow the wearer to pump air to a mouthpiece.

  3. Cascade filling system - Wikipedia

    en.wikipedia.org/wiki/Cascade_filling_system

    A cascade filling system is a high-pressure gas cylinder storage system that is used for the refilling of smaller compressed gas cylinders. [1] [2] In some applications, each of the large cylinders is filled by a compressor, otherwise they may be filled remotely and replaced when the pressure is too low for effective transfer. The cascade ...

  4. Diving air compressor - Wikipedia

    en.wikipedia.org/wiki/Diving_air_compressor

    Breathing air compressors must be carefully designed and placed so that the compressor's intake is located in fresh air well away and upstream from any engine exhaust. [5] [6] Lubricating-oil vapour – Oil, which must be used to lubricate the compressor's internal parts, can be harmful if it contaminates the breathing gas and is inhaled as a mist.

  5. Surface-supplied diving - Wikipedia

    en.wikipedia.org/wiki/Surface-supplied_diving

    Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California US Navy Diver using Kirby Morgan Superlight 37 diving helmet [1]. Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. [2]

  6. Light and air unit - Wikipedia

    en.wikipedia.org/wiki/Light_and_air_unit

    The depleted air cylinders within the breathing apparatus must be replaced and refilled throughout the incident. [2] The air and light unit can refill the cylinders while in the field using an onboard air compressor and cascade system. [1] It also carries a supply of spare air cylinders.

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  8. Lambertsen Amphibious Respiratory Unit - Wikipedia

    en.wikipedia.org/wiki/Lambertsen_Amphibious...

    Lambertsen designed the LARU while a medical student and demonstrated the LARU to the Office of Strategic Services (OSS) (after already being rejected by the U.S. Navy) in a pool at the Shoreham Hotel in Washington D.C. in 1942 [3] [4] The OSS "Operational Swimmer Group" was formed and Lambertsen's responsibilities included training and developing methods of combining self-contained diving and ...

  9. Gas blending for scuba diving - Wikipedia

    en.wikipedia.org/wiki/Gas_blending_for_scuba_diving

    At this pressure and normal temperatures, air departs from linearity by about 5%, e.g. a 10-litre cylinder filled to 230 bar with air only contains about 95% of the expected 2300 litres of free air. Above this pressure, the composition of the final mix is difficult to predict using simple equations but needs the more complex Van der Waals ...