Abstract: A buoyancy compensator jacket for scuba diving includes an inflatable and deflatable bladder; a backplate part, to which the bladder and elements fastening at least one breathing gas cylinder are attached; and at least one pair of shoulder straps for securing it to the torso of a user and at least one ventral securing strap or ventral closure of the jacket. The jacket further includes a sternal securing element composed of at least one sternal or chest strap, which has at least one costal connection element distinct from the pair of shoulder straps and connecting the sternal strap to the backplate part.

Abstract: A buoyancy compensator jacket for scuba diving includes an inflatable and deflatable bladder; a backplate part, to which the bladder and elements fastening at least one breathing gas cylinder are attached; and at least one pair of shoulder straps for securing it to the torso of a user and at least one ventral securing strap or ventral closure of the jacket. The jacket further includes a sternal securing element composed of at least one sternal or chest strap, which has at least one costal connection element distinct from the pair of shoulder straps and connecting the sternal strap to the backplate part.

Abstract: A heel strap for swimming flippers includes a tubular resilient band having a round cross section, which can be coupled at each end to a member supporting a rigid eyelet that can be removably attached to a pivot pin projecting laterally from the flipper.

Abstract: A device for releasably connecting a first element with a second element includes a male element connectable to one end of the first element, and a female element connectable to one end of the second element such that the male and female element pass from a disengagement condition to a mutual engagement condition. A slider activates and deactivates engagement and is engaged to the male element such to slide along the axis of insertion of the male element inside the female element. The relative motion between the activation/deactivation slider and the male element is transmitted to first removable locking members, belonging to the male element and cooperating with corresponding second locking members belonging to the female element such to pass from a stable locking condition to a stable release condition of the male and female elements via a movement of the slider along the axis of insertion.

Abstract: A shut-off member of a pressure reducing valve of a pressure regulator device, such as a diaphragm-type first stage for scuba diving, includes an enlarged head connected to a shaft and cooperating with a valve seat that separates a chamber supplied with high pressure gas from a chamber in which gas is at a lower pressure. The enlarged head and an end section of predetermined length of the shaft, connected to the enlarged head, are seamlessly coated with at least one layer of elastomeric material. Such coating of elastomeric material is limited to an end portion of the shaft connected to the enlarged head and the coated shaft portion is entirely contained in the high-pressure chamber in any operating position of the shut-off member.

Abstract: A shut-off member of a pressure reducing valve of a pressure regulator device, such as a diaphragm-type first stage for scuba diving, includes an enlarged head connected to a shaft and cooperating with a valve seat that separates a chamber supplied with high pressure gas from a chamber in which gas is at a lower pressure. The enlarged head and an end section of predetermined length of the shaft, connected to the enlarged head, are seamlessly coated with at least one layer of elastomeric material. Such coating of elastomeric material is limited to an end portion of the shaft connected to the enlarged head and the coated shaft portion is entirely contained in the high-pressure chamber in any operating position of the shut-off member.

Abstract: Swimming fins of the kind comprising a foot pocket provided with a outsole and an upper closed at the tip and open at the heel zone, for lodging with slight clearance the feet of a scuba diver wearing diving booths, characterized by the fact that the outsole and/or the upper sections of the said fins are provided with a number of through holes.

Abstract: Underwater communication system comprising a plurality of communication modules, each provided with a microprocessor, a memory, a transmitter and a receiver unit; these communication modules are incorporated in an underwater computer and in a plurality of underwater equipment devices; the underwater computer and the underwater equipment devices form an underwater master/slave communication network for short and long ranges, in which each device forms a node and communicates in a bidirectional way with the other nodes of the network administered by a main underwater computer or master unit; each node of the network is identified by a unique identification code which is assigned dynamically by the master unit of the network, and is provided with at least one of said communication modules for short-range communication; a data and message transmission protocol is provided for this network, for administering the bidirectional network between the various nodes of the network.

Abstract: Buckle for adjusting the strap in equipment for practicing water sports, such as diving goggles, swimming goggles or the like, said strap being provided at at-least one end with a plurality of transverse reliefs, said buckle comprising a body provided with means for driving said end of the strap and with an engaging tooth which is normally kept in a position engaged with said reliefs of said strap, against said drive means, there being envisaged operating means able to disengage said engaging tooth from said reliefs, comprising means with an inclined surface co-operating with said engaging tooth and movable in a direction substantially parallel to the longitudinal axis of the end of said belt.

Abstract: Swimming flipper comprising a shoe part from which two ribs extend laterally, and a fin part, characterised in that said fin part is connected at one end to said shoe part, while its other end is constrained to said ribs in the vicinity of their ends, the sides of said fin part being at least partly not constrained in any way to the said side ribs, all of which so that during the active and passive phases of the flipper movement the free part and the constrained part of the said fin bend in the opposite directions forming substantially an S shape.

Abstract: An automatic regulator for breathing apparatus, comprising a chamber which communicates with the breathing apparatus, including therein an air-dispensing valve, and a chamber which communicates with the environment. Said chambers are sealingly separated from each other by means of a flexible membrane which controls the dispensing valve, while the chamber which communicates with the environment is defined exteriorly by a cover provided with a tongue which is obtained by a partial cut in the front face of said cover and which is resiliently deflected inwards by an external depressing force, so as to deflect said membrane towards the interior of the chamber which communicates with the breathing apparatus and to cause the opening of said dispensing valve.

Abstract: The invention relates to a regulator for breathing apparatus with a first reducing stage and a second reducing stage (2, 6) integral with a moutpiece (4) comprising a chamber (2) communicating with the mouthpiece (4) and a chamber (6) communicating with the surroundings, separated by a membrane (5) which controls the opening and the closure of a dispensing valve provided in a connector member (10) between the first and second stages. To premit the connector member (10) to be mounted in a reliable and easy manner, either on the right-hand and left-hand sides of the second stage of a regulator for a breathing apparatus, the chamber (2) communicating with the mouthpiece (4) is provided both on the right-hand and left-hand sides with a mating seat (9) for the connector member (10) between the two stages and said member (10) has two dispensing holes (15) of the same size, a closing and/or throttling means (11) for the dispensing hole (15) away from the mouthpiece (4) being provided at each mating seat (9).

Abstract: A floating piston member formed with an axial conduit communicating with the air-feeding conduit from the first stage of reduction of an air bottle, is provided at one end with a valve seat. The floating piston member may be displaced between a first operative position, in which it is pushed by air pressure against the seal of a valve member against the action of a spring, and a second position wherein it is separated and moved away from the seal of the valve member by the action of the spring. The valve member is controlled by the manostat diaphragm of the breathing apparatus, through a suitable transmission and is urged constantly toward the valve seat by a spring.

Abstract: A portable shooting weapon comprises a releasable firing mechanism and a cooperating trigger and pin for releasing the firing mechanism. The trigger actuates the pin when the trigger is moved by a finger of a shooter. The trigger comprises a first, downwardly extending body portion fulcrumed to the shooting weapon. A second body portion is slidingly supported in the first body portion so that the second body portion is shiftable in a fore and aft direction with respect to the first body portion. The first and second body portions of the trigger are connected together in an easily disengageable manner at a number of pre-set relative positions. The second body portion of the trigger projects beyond the first body portion and the extent of projection is adjustable by disengagement and movement of the second body portion of the trigger with respect to the first body portion.