Abstract: A first stage pressure regulator for a two-stage underwater breathing apparatus, comprises a second movable wall (16, 18) for separating a balance chamber (10) from an ambient exposed chamber (17) . The second movable wall is formed by a disk-shaped piston (16) which is slideably and non sealingly guided along the peripheral walls that delimit the balance chamber (10), and by an elastically deformable diaphragm (18), which overlies the side of the piston (16) facing forward the ambient exposed chamber (17) . The elastically deformable diaphragm (18) forms with said piston (16) a diaphragm type pressure relief valve (20, 318).

Abstract: A second stage of a regulator for scuba breathing apparatus which comprises a body having an extension sleeve for delivering a breathing gas mixture to a user and a replaceable mouthpiece element comprising a connecting sleeve, which connecting sleeve of the mouthpiece is elastically deformable and may be fitted on said delivery sleeve of the second stage. According to an embodiment of the invention, there are provided separate and independent pull-out resistant means for mechanically locking the mouthpiece element to the delivery sleeve and separate and independent means for providing a hermetic seal between the mouthpiece element and the delivery sleeve.

Abstract: Embodiments of the invention relate to a first stage pressure reducing valve having a tubular plug, particularly for regulators of scuba breathing apparatus. According to embodiments of the invention, at least a portion of the outer surface of the valve has fins for heat exchange with the outside environment, designed to prevent or reduce the formation of ice caused by the temperature drop generated by gas expansion inside the valve.

Abstract: The invention relates to a first stage pressure reducing valve having a tubular plug, particularly for regulators of scuba breathing apparatus. According to the invention, at least a portion of the outer surface of the valve has fins (19, 19?) for heat exchange with the outside environment, designed to prevent or reduce the formation of ice (18) caused by the temperature drop generated by gas expansion inside the valve.

Abstract: A first stage pressure regulator for a two-stage underwater breathing apparatus, comprises a second movable wall (16, 18) for separating a balance chamber (10) from an ambient exposed chamber (17) . The second movable wall is formed by a disk-shaped piston (16) which is slideably and non sealingly guided along the peripheral walls that delimit the balance chamber (10), and by an elastically deformable diaphragm (18) , which overlies the side of the piston (16) facing forward the ambient exposed chamber (17) . The elastically deformable diaphragm (18) forms with said piston (16) a diaphragm type pressure relief valve (20, 318).

Abstract: A valve for underwater aqualung supplying devices, including a pressure chamber and a watertight compensation chamber adjacent and watertightly separated by a partition wall. A shutter including a tubular stem inserted, at least in part, inside each chamber. The pressure chamber connected to a pressurized gas source and a housing suitable for cooperating with an end connected with the shutter. The compensation chamber is provided with at least one opening communicating with the outside and a stem end in the shape of an expansion enlarged head connected with the valve outlet. A coil spring is watertightly driven into the chamber between the expansion head and the partition wall. In the valve the enlarged expansion head of the shutter is encircled by a thermal insulating annular part watertightly positioned between the head and the side wall of the compensation chamber.

Abstract: A diving and swimming mask, comprising a mask body made of a soft material which has at least one front opening around the eye region, which opening is closed by a transparent member, particularly a lens and there being provided, at each lateral side of the mask, attachment points for attaching an end of a strap and/or a buckle element for engagement of an end of a strap for fastening the mask against the user's face. According to the invention, when worn by the user the transparent member is positioned inclined or may be positioned inclined against the face of the user at the lower edge of the said transparent member, i.e. at the edge nearest to the user's mouth so that the upper edge of the transparent element is nearer to the user's face at the said lower edge, than at the opposite upper edge of the said transparent element.

Abstract: Diving mask with compensation consisting of an outer frame, suitably shaped, and of an inner face connected to said outer frame. The frame is formed by a body shaped so as to house the diver's nose and provided on the side of at least one nostril of the diver's nose with structure for the compression of said nostril, and on the side of the other nostril with at least one abutment for said nostril. The compression structure is secured to the body and can be operated by the diver from the outside of the mask.

Abstract: The invention relates to a pressure reducing valve having a piston-like plug, and whose output pressure is automatically controlled relative to ambient pressure, particularly for scuba breathing apparatus regulators. According to the invention, an antifriction member (18) is interposed between the pad (13) which forms the valve seat and cooperates with the tubular plug (8) and the threaded stem (17) for adjusting the axial position of the pad (13), which antifriction member is free to rotate and to slide axially and prevents any direct contact between the pad and the adjustment threaded stem (17), thereby preventing the threaded stem from driving the pad along (13) into rotation. The antifriction member may be a disk (18) made of a relatively hard material with an appropriate surface smoothness, such as stainless steel or tungsten or a plastic material known with the trade name DELRIN, or the like.

Abstract: The invention relates to a swim fin, comprising a seat for the foot, the so-called footpocket (1) and a propelling blade (102, 202), the fin being composed of at least two materials, whereof one is comparatively rigid and substantially inextensible and the other is comparatively soft, i.e. has a different rigidity and/or is extensible. According to the invention, the at least one comparatively rigid material forms a frame (4) for the blade (102, 202) and/or footpocket (1), designed to be overmolded with the part/s (101, 201, 301, 302, 402, 502, 105) made of the at least one comparatively soft material, which complete and/or connect and/or cover, at least partly, the parts of the frame (4).

Abstract: An air valve of a balancing jacket can be opened not only by a conventional driving cable located within the corrugated pipe of the balancing jacket, but also independently from the conventional driving cable by an auxiliary driving member integral or operationally connected with the valve element of an air valve and controlled by the diver directly with his hands and/or by a separate control member.

Abstract: Aeration tube provided on its lower end with a mouthpiece (2) and on its upper end with an air intake hole (41), such tube consisting in its length of two or more tubular elements (1, 3) connected in such a way that the tube can be folded two or more times on itself.

Abstract: Hydrostatic balancing jacket for underwater diving, including a dorsal element from which there proceed two shoulder flaps and two abdominal/pectoral flaps, each shoulder flap being connectable to the corresponding abdominal/pectoral flap by straps provided with buckles which can be adjusted on the straps, just as the abdominal/pectoral flaps are connectable together by straps provided with buckles; the free ends of the straps may be inserted in a number of housings made in the flaps.

Abstract: Method for manufacturing regulating membranes for breathing apparatus characterized in that it comprises a phase of molding of the aforesaid membrane during which a disk, made of rigid or semi-rigid material, is embedded and anchored inside the membrane itself, which presents continuity of material on the upper part.

Abstract: A regulator (2) for underwater breathing apparatus (1) which guarantees a high degree of hygiene comprises a body (7), a delivery outlet (8) formed in the said body (7) to deliver a breathable mixture to a user, a mouthpiece (9) for the said delivery outlet (8) and quick-release fixing means (12) for the said mouthpiece (9) on the said delivery outlet (8).

Abstract: Underwater breathing apparatus with improved ease of handling comprises a cylinder, a meter and a quick coupling on the cylinder and on the meter, together with a flexible hose having quick couplings at its ends.

Abstract: A support device, in particular for diving equipment parts, and of the type intended to be carried by the diver, comprises a clamping clip (1) which can be elastically opened and which grips the equipment part (2), and means (3, 4) for securing the clip (1) to a part of the equipment which is worn (5), such as a garment, a jacket, or a part of the harness. The device is particularly useful, especially for supporting an emergency regulator (2), known as an octopus rig. For this purpose in particular, a cap (8) for closing off the air outlet hole in the mouthpiece of the emergency regulator (2), is attached to the device.

Abstract: A regulator (2) for an under water breathing apparatus (1) comprises a body (7), a duct (5) for delivery of breathable mixture, a shutter (20) of soft material stressed towards a shutter seat (5a), a push button (11) acting via a lever (21) on the shutter (20) to control it to move away from the shutter seat (5a) upon manual delivery of the breathable mixture, removable locking means (24)in the said push button (11) for locking the lever (21) in a position in which the said lever (21) retains the shutter (20) in a position just touching the shutter seat (5a) to prevent damage to the shutter (20) in inactive periods of the regulator (2).

Abstract: A valve for regulators in self-contained underwater breathing apparatus includes a tubular plug (9) axially slidably accommodated in two sealingly separated adjacent chambers (6,7). Of these two chambers, the so-called pressure chamber (6) is connected with a pressurized gas source, and is provided with a seat (11) for cooperating with the matching edge (109) of the tubular plug (9), and the so-called compensation chamber (7) is formed with a hole or holes (107) connected with the ambient medium, and has the relative end portion of the tubular plug (9), which is in form of a flaring-out expansion head (209) connected with the valve outlet (12), sealingly guided therein. A helical spring (10) is arranged between the expansion head (209) and the opposite partition (8), dividing the two chambers from each other.