A diving mask includes a transparent visor, a frame, a gasket to guarantee the watertight seal and appropriate belts for fitting the mask, a breathing tube associated with the facial part is fitted onto the upper part of the mask and which enables the flow of air to enter into the compartment between the frame and the visor. The path of air in the inhalation phase and in the exhalation phase both in the mask and tube are different from each other. The tube is made with separate ducts for inhalation and exhalation and the inside of the mask is made with two compartments, one upper front and one lower oronasal separated by a wall. The path provides that inhalation air is introduced by the tube into the frontal compartment and then into the oronasal one and air exhaled from the oronasal compartment travels up to the tube.

A breathable mask includes a main body and a breathing tube, and the breathing tube and an interior of the main body can be in fluid communication. The body includes a main frame, a lens module and a water-sealing skirt. The main frame has a lens frame, a mouth frame and a nose frame interposed therebetween. The lens module has a transparent lens portion. The water-sealing skirt is integrally formed by an eye skirt, a nose skirt and a mouth skirt, and a skirt frame is arranged in front of the eye skirt. The transparent lens portion and the skirt frame are embedded in the lens frame in a water-sealing manner, and the nose skirt part protrudes outward from the nose frame. The mouth skirt is adapted for one-way fluid communication to the outside through the mouth frame.

A breathable mask includes a main body, a breathing tube, a head strap and a chin strap or support. The breathing tube can be in fluid communication with the interior of the main body. The head strap and a chin strap or support form a three-point fix from a user’s head to the main body of the mask.

A survival helmet device for use in combination with a survival suit includes a helmet, inhale and exhale control valves, and at least one inflatable air cavity packet secured to the survival suit for selectively controlling the air supply and buoyancy of the survival helmet device and the survival suit.

A snorkeling breathing apparatus includes a mask, a first breathing tube assembly and a one-way exhaust valve. The mask includes an outer mask and a breathing mask arranged in the outer mask, the mask is equipped with a breathing chamber. The breathing tube assembly includes a first breathing tube and a one-way inhaling valve. The breathing tube is connected to the breathing mask through the inhaling valve. The exhaust valve is connected and mounted on the outer mask and the breathing mask. While inhaling, the inhaling valve conducts and air enters the chamber through the breathing tube. While exhaling, the exhaust valve conducts and air flows from the chamber to outside.

A diaphragm or non-return valve is disposed in a supporting wall and includes a diaphragm plug and a valve seat having a passage opening surrounded by a continuous surface for sealing adhesion contact of a sealing lip of the diaphragm plug. The diaphragm plug is made as one piece and is of the same elastic, flexible material as the supporting wall, from which the diaphragm plug is separated along its perimetric edge by slots having a predetermined length. The diaphragm plug and the supporting wall are connected by at least two material bridges provided on opposite sides of the perimetric edge of the diaphragm plug, and the valve seat is configured as a shaped plate locked to the supporting wall in a position coincident with the diaphragm plug by a tightening ring, the valve seat and the tightening ring being engaged by elements passing through at least part of the slots.

A full-face diving mask includes a mask and a breathing tube. The mask includes an outer frame, a lens housing and a fitting mask. The fitting mask includes a partition plate. The partition plate and the inner surface of the lens housing define an observation chamber on the top and a breathing chamber below. The partition plate includes at least one air intake port to allow inhaled air to be guided and circulated through at least one air intake passageway from the observation chamber toward the breathing chamber. The breathing chamber is further provided with an air compartment partition plate connected to the partition plate to define an air discharge compartment. The air compartment partition plate is provided with at least one air discharge port to allow exhaled air to be guided through at least one air discharge passageway from the air discharge compartment and discharged along the breathing tube.

A diving mask having a rigid frame with a front perimeter edge and a rear perimeter edge. The frame provides an upper portion and a lower portion connected by first and second lateral portions. The mask also includes a visor of a transparent material and fixed to the frame, and an inhalation duct, or snorkel. Inside the frame a face member made of a soft and flexible material is arranged in contact with the user's face. A partition member divides the volume between the visor and the face member in an upper chamber pneumatically connected to the inhalation duct, or snorkel, through an opening, and in a lower chamber arranged to house the nose and the mouth of the user. A discharge duct pneumatically connects the lower chamber with an exit mouth.

A breathable mask includes a body having a main frame, a lens, and a waterproof sealing skirt. The waterproof sealing skirt has a partition dividing the interior of the body into an upper chamber that shields the eyes and a lower chamber that shields the nose, and arranges independent air intake passages and exhaust passages to separate the fresh air inhaled and the dirty air exhaled. Alternatively, a nasal connecting portion having a purge valve can be provided in fluid communication with the lower chamber. It is also possible to provide a three-way connector having a nasal connecting portion, a mouth portion, and a drain portion in fluid communication with one another, wherein the nasal connecting portion is in fluid communication with the lower chamber. The mouth connecting portion is adapted to be contained in the user's mouth when the user well wears the breathable mask.

A training mask for the training of the respiratory muscles and/or snorkeling mask with improved air routing of the inhaled and/or exhaled air includes a half mask (8) sealingly closing the mouth and nose area, wherein an air-conducting channel connector (15, 40) with hollow profile is arranged in front of the half mask (8), via which connector at least the inhaled air can be introduced frontally in the half mask (8) via an approximately central inflow opening (22).