Mouthpiece

:For the hardcore punk band, see Mouthpiece (band).

Scuba diving and industrial breathing sets

In breathing sets, a mouthpiece is a part that the user grips in his mouth, to make a watertight seal between the breathing set and his mouth. It is composed of a short flattened-oval tubs that goes in between the lips, with on its free end a flange that fits between the lips and the teeth and gums. On the flange there are two projections with enlarged ends, which are gripped between the teeth. Most sport diving scuba sets use a mouthpiece rather than a fullface mask.

Related Topics:
Breathing set - Mouth - Lips - Teeth - Gums - Sport diving - Scuba sets - Fullface mask

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

In many industrial breathing sets and a few scuba sets (e.g. the Siebe Gorman Salvus, and a 1980's model of twin-hose diving regulator made by Nemrod), the mouthpiece also has an outer rubber flange that fits outside the lips and extends into two straps that fasten together behind the neck. That makes the mouthpiece more airtight and watertight, and helps to keep the mouthpiece in if the user lets his lips or jaws get slack through unconsciousness or absent-mindedness or being preoccupied with work.

Related Topics:
Siebe Gorman Salvus - Twin-hose diving regulator - Nemrod

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

A mouthpiece in the mouth prevents clear speech; as a result, many work divers, and many people who use a breathing set on land (e.g. firefighters), use a fullface mask.

Related Topics:
Prevents clear speech - Firefighter - Fullface mask

~ ~ ~ ~ ~ ~ ~ ~ ~ ~

In a loop of wide breathing tubes like in a twin-hose aqualung or some rebreathers, the word "mouthpiece" is sometimes taken as including the whole of the rigid assembly between the two flexible tubes.

Related Topics:
Twin-hose aqualung - Rebreather

~ ~ ~ ~ ~ ~ ~ ~ ~ ~