The invention discloses a snorkeling breathing apparatus comprising a mask, a first breathing tube assembly and a one-way exhaust valve. The mask comprises an outer mask and a breathing mask provided within the outer mask and, equipped with a breathing chamber. The breathing tube assembly comprises 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. The invention aims at making an innovation to the breathing system by separating, the exhalation and suction mechanically, to make sure air in the breathing cavity is always fresh, and to increase the safety performance.

A diving breathing tube with a safety warning device includes a tube body. One end of the tube body is provided with a mouthpiece, and the other end is provided with a tube head. The tube head includes a cover body and a cylinder body. The inner portion of the tube head is provided with a light warning device. The cover body is made of an insulating material with light transmission capacity. A waterproof sealing structure is adopted respectively between the cover body and the cylinder body of the tube head and between the tube head and the tube body. In the present invention, since the inner portion of the tube head of the diving breathing tube is provided with a light warning device, the light warning device has a slow flashing warning function, and can give out an SOS international standard rescue signal when a danger is encountered.

An improved hydrodynamic sports snorkel for use in swim training, exercise and other recreational activities, which facilitates efficient swimming by eliminating the need for a swimmer to turn their head to the side for breathing. The sport snorkel device provides a novel design that significantly reduces drag and resistance, including by directing breathing tubes down the sides of the chin and under the jaw line toward the neck, around the neck and rejoining and going to the surface at the back of the neck behind the swimmer's head. This novel design with tubes running under the jawline and behind the head significantly reduces the portion of snorkel tubing directly in the water flow stream and thus reduces drag and resistance. The sport snorkel device also allows the swimmer to hold the snorkel solely by the mouthpiece without the need to fixedly attach the device to the swimmer's head or goggles.

The present technology relates to a snorkel which includes a breathing tube having a first end received in a mouth of a user and an upper opening in a second end opposite the first end. The snorkel further includes a housing around the upper opening which includes a slot. The housing and slot together trap an air pocket within the housing when the housing is submerged underwater, with the upper opening of the breathing tube positioned in the air pocket to prevent water from entering the upper opening.

A mask for surface snorkeling includes a rigid frame (2), a transparent visor (3), a soft face mask (4) sealingly applicable to the face of the user and having a membrane (7) which delimits an upper viewing chamber (8) being shaped to contain the eyes of the user and a lower breathing chamber (9) being shaped to contain the nose and the mouth of the user, and a breathing circuit (5) connected to the lower chamber (9), a ventilation circuit of the upper chamber (8) being further provided that is independent of and separated from the breathing circuit (5).

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 arching snorkel is disclosed that includes and arching breathing tube with a mouth-piece end and a breathing end. At the elbow-shaped hollow breathing tube mouth-piece adapter with a mouth-piece that rotates or swivels with respect to the arching breathing tube. The snorkel also includes a yoke-shaped bracket member coupled to a mid-section of the arching breathing tube with one or more apertures for holding a head-strap. In accordance with an embodiment of the invention the yoke-shaped bracket member is vertically adjustable along the mid-section of the arching breathing tube.

A full face mask and snorkel can include a full face mask and a rigid snorkel attached to the side of the mask. The side location of the ridged snorkel avoids peripheral ducting of air around the full face mask. The full face mask includes a main peripheral full face seal coupled to the mask's rigid support structure. The full face mask includes a separation seal dividing the full face mask into at least an upper chamber. The snorkel is affixed to the side of the full face mask at a location proximate to where the separation seal meets the main seal. A full face mask and snorkel can also include an exhalation valve located within the snorkel and proximate to the mask so as to avoid a volume of respirated air within the snorkel from being reinhaled into the lower chamber of the full face mask.

A snorkel assembly includes a mouthpiece and a tube secured thereto. The tube extends between a mouthpiece end and a distal end. A purge valve is disposed adjacent the mouthpiece and the mouthpiece end of the tube. The purge valve allows water and gas to exit the snorkel assembly while preventing water and gas from entering therethrough. The snorkel assembly also includes a check valve secured to the distal end. The check valve allows water and gas to enter the snorkel assembly while preventing water and gas from exiting therethrough.

A breathing apparatus for a submersible craft is provided that includes a generally vertical tubular structure and a float configured to move vertically within the tubular structure between a first vertical position in which a third opening into the craft is unobstructed by the float and a second vertical position in which the third opening is fully obstructed by the float, and where the vertical position of the float is modulated based on the water level relative to the craft.