Abstract: Device for pressurized breathable gas for a diver, wherein the pressure reducing device (1) having a yoke (6) and includes a body (2) that houses a gas circuit (3) formed at the level of an inlet connection (9), a depressurized gas outlet, a pressure regulator (3) located between the inlet (4) and the outlet (5), a yoke (6) connected to the body (2) and supporting a clamping mechanism (7) that is mobile to the yoke (6) to for tightening or loosening of a pressurized gas source valve (8) at the inlet (4) of the body (2), the inlet connection (9) includes an upstream end around the inlet (4), the sealing region (100) includes a seal (10) and/or is designed to cooperate with a seal (10) of a valve or an adapter of a valve to seal between a valve (8) and the pressure relief device (1).

Abstract: The high pressure gas inlet channel (6) of the pressure regulator (1) is formed upstream in a stationary valve element (7) having an enlarged terminal head (9) interacting with a seat edge of a movable seat (10) acted upon in closure position by a spring (23), the mounting of the pressure regulator (1) in the high pressure gas inlet tap body (3) causing the retraction of the seat (10) and the opening of the inlet channel normally kept blanked off during operations of storage and/or washing of the pressure regulator. Applies mainly to sea diving pressure regulators.

Abstract: A reducing valve, which includes a water trap, especially useful in diving.

Abstract: The body of the valve has two outlets whose axes are offset in the direction of the axis of the mounting base by a distance greater than 5 mm, typically between 20 and 60 mm, the spacing between the outlet axes being greater than 60 mm and typically less than 130 mm. This arrangement avoids problems of positioning and collision between the upstream circuitry connected to the outlets in the use configuration of the valve on a dive tank.

Abstract: The regulator comprises a piston (13) comprising a hollow rod (21) extending through an internal partition (6) delimiting a high pressure chamber (3) and an internal chamber (5) and coacting with a valve seat (24) disposed in the high pressure chamber (3) and carried by a closure member (25) mounted in one end (2) of the regulator body. The internal chamber (29) communicates with a lateral chamber (9) formed externally by a membrane (10), the two chambers (9 and 5) being filled with an incompressible fluid (29), typically a silicone oil, transmitting to the piston (13) the ambient pressure. The regulator is useful in respiratory equipment for divers, particularly for divers in cold water.

Abstract: A belt structure, particularly for carrying diving equipment, comprises a closure strap (2) having at least one free portion (7a; 7b) on a surface of which are secured at least two first securement elements (13), typically in the form of loops. A second securement element (14) is carried by a wing of a substantially rigid dorsal carrying element (1), so as to modify the effective length of the free portion according to the different sizes of the users.

Abstract: The expansion valve unit, coupled to a lever of a diaphragm by means of a rod unit extending through the internal cavity of the housing, includes heat exchange with the surrounding medium, a rod support at the end of the rod unit opposite the valve unit, being also advantageously associated with a heat exchange unit so as to prevent icing, under the effect of expansion of the breathing gas into the housing, of the mechanical control train of the valve unit, in case of use in a cold surrounding medium.

Abstract: A movable partition of a chamber of variable capacity consists of a diaphragm of elastomeric material which has been preshaped to provide a main part and a control part of reduced area, which is outwardly offset with respect to the main part and arranged for cooperating with a pressure reducer which selectively feeds a treating gas into the variable capacity chamber.

Abstract: Apparatus to supply breathing gas to a diver. A pressure-reducing valve is opened and closed by a piston actuated by an extended rod whose end is coupled to an articulated control lever which is driven by a diaphragm. By increasing the distance from the articulated lever, through the rod to the pressure-reducing valve, the risk of icing caused by cooling energy generated at the pressure-reducing valve when the diver operates in very cold water is eliminated.

Abstract: An expander for compressed gas of the type having a valve 12, 13 delivering an expanded gas at 50 from a high pressure gas 6, 7, and a pilot expander 21 delivering via 41 a gaseous control charge into the compartment 17 of the principal expander. Useful in delivering respiratory gas in underwater diving.

Abstract: Breathing apparatus for diving of the type comprising a breathing bag (13), a mouthpiece (30), inhaling and exhaling ducts (16 and 17) connected to the bag and to the mouthpiece these inhaling and exhaling ducts being respectively provided with inhaling and exhaling non return valves (18 and 19), and a so called "drainage" device. The apparatus further comprises a device (22) for measuring the volume of inhaled and exhaled gas. The draining device comprises a switching means (21) which, in so called "operating" position, is adapted to direct the flow towards the exhaling valve (19), and in so called "non operating" position is adapted to direct the exhaled flow towards an outlet drain (23).

Abstract: A compressed air breathing apparatus, in particular for underwater diving, comprising a compressed air supply (1) communicating with a chamber (15) for expanding the compressed air, through a valve (6,7,2,10,13,3,14) whose opening and closing are controlled by a diaphragm (4) responsive to the inhaling effort on the part of the user, and a mouthpiece (22) comprising a conduit (21) which puts the expansion chamber (15) in communication with the mouth of the user. According to the invention, the conduit (21) of the mouthpiece (22) includes a tongue (5) for forming an obstacle to the free flow of the air from the expansion chamber (15) to the mouth of the user, the tongue (5) being so arranged that the depression required for opening the valve is between -6 millibars and +6 millibars for a rate of flow of 400 liters/min. The tongue (5) is adjustable as to position to vary the extent to which it impedes free flow of the air.

Abstract: This invention relates to breathing apparatus specially suited to submerged use, of the kind comprising a two-stage pressure reducer whose first stage is connected to the outlet valve of the diving cylinder and is responsible for the reduction from high pressure to medium pressure, while the second stage is associated directly with the mouthpiece and supplied it with air for respiration in response to each inhalatory suction from the user which exceeds a minimum threshold value termed the lifting suction.According to the invention, the first stage includes structure for adjusting the medium pressure, which has a member for direct manual operation which is mounted to be easily accessible and which can be operated by the user even when diving, so that the medium pressure can be adjusted whenever the lifting suction becomes too great, or whenever the effect of changes in the operation of the first stage is to alter it, or before diving in shallows.

Abstract: The present invention concerns closed circuit breathing apparatus comprising a mask having inhalation and exhalation ducts in communication with a regenerator for regenerating exhaled air. A source of air under pressure is connected to the closed circuit so as to feed unused air into the circuit in such a manner as to draw regenerated air to the mask and to maintain a slight over pressure.