(57) Regulator for underwater breathing apparatus, comprising a box-like body (1) in which
is formed a chamber (6) having a first tubular element (8) for connection to a mouthpiece,
a second tubular element (9) provided with a regulating valve (14) for supplying air
to the inside of the regulator chamber (6), a conduit (11) for discharging expired
air and any residual water, and an aperture (7) on which is positioned a flexible
diaphragm (2) surmounted by a cover (3, 3') provided with a set of holes (5) or apertures
(5') adapted to allow water to come into contact with the outer surface of the flexible
diaphragm (2); the flexible diaphragm (2) interacts by suitable means (13, 13') with
the regulating valve (14); the diaphragm (2) and the cover (3, 3') lie on, or are
parallel to, a plane (M') facing upwards and inclined forwards relative to a generally
upright position of the diver; a plurality of water inlet apertures (5') is formed
behind the cover (3').
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