Abstract: A device for reversibly connecting together a first element and a second element designed to be alternately connected and disconnected includes a male element inserted into a female element to move from a mutually disengaged state to a mutually engaged state and a slider for actuation/release of the engaged state, which is slidingly engaged by the male element into the female element. The relative movement of the actuation/release slider and the male element is transferred to first releasable locking members of the male element, which cooperate with corresponding second locking members of the female element to move from a stable locked state to a stable unlocked state of the male element by a movement of the slider in the direction of insertion. Furthermore, the male element includes a handle having the slider at least partially and slidingly housed therein.

Abstract: A device for reversibly connecting together a first element and a second element designed to be alternately connected and disconnected includes a male element, inserted into a female element to move from a mutually disengaged state to a mutually engaged state, and a slider, for actuation/release of the engaged state, which is slidingly engaged by the male element into the female element. The relative movement of the actuation/release slider and the male element is transferred to first releasable locking members of the male element, which cooperate with corresponding second locking members of the female element to move from a stable locked state to a stable unlocked state of the male element by a movement of the slider in the direction of insertion. Furthermore, the male element includes a handle having the slider at least partially and slidingly housed therein.

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: Heel strap (5) for swimming flippers (1) of the open shoe type (3), comprising a tubular resilient element (10), with a round cross section, connected to each end and connected removably to means (12, 11) for supporting a rigid eyelet (9) which can be attached removably to a corresponding pivot pin (6, 7) projecting laterally from the flipper (1).

Abstract: Second-stage valve for a breathing-gas regulator for an air aqualung for underwater activity, of the type comprising a chamber which houses the stem of an open/close element that is pushed permanently in a direction of closure against the seat of the breathing-air release valve by a spring, the free end of this stem being connected to a lever that works in conjunction with a constant-pressure diaphragm and that opens said valve in opposition to the action of said spring, said valve being characterized in that said chamber comprises a thin metal inner liner coated with a coating of plastic or composite material.

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: 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.