An underwater mask includes a frame, a transparent portion supported by the frame, a seal portion mounted on the frame and adapted to be positioned on a user's face, and a ventilation tube. The seal portion has a partition wall resting on the user's nose and forming upper and lower chambers, which communicate through a passage in the partition wall and a one-way valve to enable air to flow only from the upper to the lower chamber. The ventilation tube has separate channels providing communication between the upper and respectively the lower chamber and the outer environment, and a hub between tube and mask, fastened to the mask and connected to the tube by a joint, so that in a coupling position the hub and the tube are fastened, and in a releasing position the hub and the tube remain connected but the tube is free to swing.

An underwater mask includes a frame, a transparent part, a seal part mounted on the frame, and a snorkel. The seal part has a partition wall forming an upper and a lower chamber, the lower chamber receiving nose and mouth of the user. The two chambers communicate through a passage in the partition wall and a one-way valve so that air can pass only from the upper chamber to the lower chamber. The snorkel has first and second channels through which the upper and respectively lower chamber communicate with the outside. A connection end between snorkel and mask is fastened at an opening of the seal part to put the first channel of the snorkel in communication with the upper chamber of the mask, and further has a side inlet for a corresponding exhaust tube that puts the lower chamber in communication with the second channel of the snorkel.

The disclosure relates to a diving mask, including: a mask having a breath cavity corresponding to a mouth and a nose of a user; a vent tube connected to the mask and provided with an inlet passage, the inlet passage communicating the breath cavity with external air; and an exhaust device communicating the breath cavity, the exhaust device including an exhaust fan configured to discharge air in the breath cavity into an external environment, thereby enabling the external air to flow into the breath cavity through the inlet passage.

An underwater mask includes a frame, a transparent portion supported by the frame, a seal portion mounted on the frame and adapted to be positioned on a user's face, and a ventilation tube. The seal portion has a partition wall resting on the user's nose and forming upper and lower chambers, which communicate through a passage in the partition wall and a one-way valve to enable air to flow only from the upper to the lower chamber. The ventilation tube has separate channels providing communication between the upper and respectively the lower chamber and the outer environment, and a hub between tube and mask, fastened to the mask and connected to the tube by a joint, so that in a coupling position the hub and the tube are fastened, and in a releasing position the hub and the tube remain connected but the tube is free to swing.

A mask for underwater use includes a frame, a transparent part supported by the frame, and a gasket part mounted on the frame and configured to be positioned on the face of a user. The gasket part has a perimeter edge adapted to rest on the perimeter of the user's face, and the perimeter edge includes a discharge opening, which is located at the region configured to be arranged near the user's mouth and which is the seat of a valve non-return mechanism, which enables the expulsion of breathed gases simultaneously with any water present in the lower chamber through the opening.

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 consisting of 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).

The invention relates to a diving mask (10) comprising a telecommunication system (190) configured to allow the establishment of a one-way or two-way light communication and, more specifically, using a Li-Fi-type communication protocol. For this purpose, the telecommunication system (190) comprises a light communication module (150) comprising a light source (151) configured to emit light signals in a plurality of directions around the diving mask (10), and an electronic control card (156) in order to control the light source (151) and modulate the amplitude of the light signal according to an electronic signal encoded by said electronic control card (156). The invention also relates to an underwater communication method (200).

The disclosure relates to a diving mask comprising a body having a faceplate and a flexible skirt, and a snorkel extending a top portion of the body. The body includes an exhaled air exhaust device that puts the bottom chamber in fluid-flow connection with the air duct of the snorkel. The exhaled air exhaust includes at least a first check valve arranged to allow exhaled air from the bottom chamber to flow towards the air duct of the snorkel during a stage in which the user is breathing out, the first check valve being closed during a stage in which the user is breathing in.

A full-face mask including a mask body, a breathing tube, an isolation support portion, and a first partition is provided. The mask body includes a lens portion and a soft portion, the soft portion fits a user's face to form an inner space. The breathing tube is disposed above the mask body and is connecting with the inner space. The isolation support portion is disposed in the inner space to define an upper space and a lower space which are connected with each other. A first partition is disposed in the lower space and includes an intake valve. The lower space is defined with a proximal space and a distal space. When the user inhales, the clean air passes through the intake valve into the proximal space. Thus, the user could effectively breathe, exhale and/or isolated from leakage water to avoid danger.

A breathable mask comprises a body and a breathing tube. The breathing tube is in fluid communication with an interior of the body. The body comprises a main frame, a lens module, and a waterproof sealing skirt. The lens module has a lens portion and a supporting device. The supporting device is integrally formed with the lens portion at a distance inward from an outermost edge of the lens portion, and is interconnected with a portion of the waterproof skirt to improve the rigidity of the vicinity of the portion.