SNORKEL
A snorkel including a breathing tube having an air inlet at one end and a mouthpiece at the other end, an elastic, self refilling reservoir for holding ambient air coupled in air flow communication to the breathing tube, and a mechanism in the reservoir in air flow communication with the breathing tube for permitting inflow of air from the breathing tube and providing outflow of air to the mouthpiece only from the reservoir
The present invention relates to diving gear, in general and, in particular, to snorkels for use during diving.
BACKGROUND OF THE INVENTIONA conventional snorkel is a breathing device, typically including a breathing tube that is open at the top and has a mouthpiece at the other end. When diving using a conventional snorkel, a diver is constrained to swim face down near the surface of the water, so that the top of the breathing tube will be out of the water. If a diver wishes to dive with the snorkel below the surface of the water, he must hold his breath and press his tongue against the mouthpiece to prevent the influx of water. Even when a valve is used in the inlet to the breathing tube that substantially prevents water from entering the breathing tube, the only air available to the driver when the inlet is under the water will be the air in his lungs. It is often desirable to be able to extend the diver's stay underwater, but without the weight and complication of carrying fixed amount of pressurized air on the diver's back.
Accordingly, there is a long felt need for a snorkel which could provide an additional “breath” of fresh air from the atmosphere to a diver while the snorkel inlet is under the water.
The present invention will be further understood and appreciated from the following detailed description taken in conjunction with the drawings in which:
The present invention relates to snorkels permitting diving below the surface of the water for a longer period of time than is possible with conventional snorkels. This is accomplished by providing a flexible, self-refilling reservoir for holding fresh air from the atmosphere coupled in air flow communication with the breathing tube. In this way, an additional quantity of ambient air is held in the reservoir as the diver dives, until it is needed by the diver, without water entering the mouthpiece. According to a preferred embodiment of the invention, a mechanism is provided in the reservoir for allowing only air from the reservoir to go to the mouthpiece, and not air and water directly from the air inlet.
Referring now to
According to some embodiments of the invention, a valve 18 is provided on air inlet 16 and is designed to prevent the ingress of water into breathing tube 12 and into reservoir 20 when the tube is submerged in water. As known in the art, valve 18 may include a pivotal sealing element (not shown) which opens by gravitational force when inlet 16 is out of the water to permit ingress of ambient air, and seals inlet 16 by the force of the water when submerged. Additionally, valve 18 may be designed to open when inlet 16 is above water surface both when the reservoir is full of air and when it is free of air, whereby the vacuum in the reservoir acts against opening of the sealing element. Opening of the valve under vacuum conditions can be accomplished by configuring the sealing element to open by balancing the weight of the sealing element against the force of the vacuum or by other methods known in the art.
Air reservoir 20 is sealingly coupled to breathing tube 12 in flow communication with the tube. In the embodiment illustrated in
According to some embodiments of the invention, a mechanism 30 is provided in the reservoir in air flow communication with the breathing tube for permitting inflow of air from the breathing tube to the reservoir and providing outflow of air to the mouthpiece only from the reservoir. In this embodiment, mechanism 30 is a partition unit. A partition unit 30 is provided inside breathing tube 12 within reservoir 20. Partition unit 30 includes a partition plate 32 extending substantially perpendicular to the longitudinal axis of the breathing tube 12. A plurality of partition inlet apertures 34 are provided in partition unit 30 to permit the inflow of air into the reservoir. Any water which inadvertently enters the breathing tube through inlet 16 will flow out through partition inlet apertures 34 over partition plate 32 and fall to the bottom of the reservoir. This water will leave the reservoir through water outlet valve 24. A plurality of partition outlet apertures 36 are provided in partition unit 30 to permit the outflow of air from the reservoir through breathing tube 12 to the mouthpiece, when the diver inhales.
When the diver is above the water, he breathes in through the breathing tube 12. At the same time, atmospheric air fills the reservoir 20 through apertures 34. Reservoir 20 may retain its original shape or may expand when air enters the reservoir, depending on the flexibility of the material of which the reservoir is formed. When the diver submerges, the inlet valve 18 closes, preventing water and air from entering the breathing tube. As the diver exhales, the used air flows through air outlet valve 28 into the water. The diver can now inhale, and air from reservoir 20 will flow through apertures 36 through valve 26 to mouthpiece 14. As air empties from reservoir 20, the flexible material permits the reservoir to collapse due to the vacuum created in the reservoir. When the diver rises again to the surface after consuming the air in the reservoir, valve 18 opens the inlet and the vacuum inside reservoir 20 will pull fresh air into the reservoir, which will expand accordingly. In this way, a dry snorkel is provided and the reservoir is automatically refilled with fresh air.
Instead of a partition unit, the mechanism in the breathing tube may include a two piece breathing tube, or two separate air pipes, as shown schematically in
Alternatively, the reservoir used according to the present invention may be disposed within the used air chamber.
It will be appreciated by those skilled in the art that the valves used according to the present invention may be adapted and configured to open only upon a prearranged threshold of pressure or manually.
It will also be appreciated by those skilled in the art that the used air chamber used according to the present invention may have stretch or elastic capabilities. In this case, the used air chamber will be configured to expand when the diver exhales and automatically collapse when the outlet valve opens, based on its stretch or elastic capabilities.
While the invention has been described with respect to a limited number of embodiments, it will be appreciated that many variations, modifications and other applications of the invention may be made. It will further be appreciated that the invention is not limited to what has been described hereinabove merely by way of example. Rather, the invention is limited solely by the claims which follow.
Claims
1. A snorkel comprising:
- a breathing tube having an air inlet at one end and a mouthpiece at the other end;
- a flexible reservoir for holding ambient air coupled in air flow communication to said breathing tube and disposed between said air inlet and said mouthpiece; and
- further comprising a water drain valve for separating water from air in said reservoir.
2. The snorkel according to claim 1, further comprising:
- a mechanism in said reservoir in air flow communication with said breathing tube for permitting inflow of air from said breathing tube and providing outflow of air to said mouthpiece only from said reservoir.
3. The snorkel according to claim 1, further comprising a used air reservoir adjacent said flexible reservoir for receiving used air from a diver when under water.
4. A method for making a snorkel, the method comprising:
- forming a breathing tube with an air inlet at one end;
- mounting a mouthpiece on said breathing tube at the other end;
- coupling a flexible reservoir for holding ambient air to said breathing tube for flow communication;
- providing inflow of air to said reservoir from said breathing tube; and
- providing outflow of air to said mouthpiece only from said reservoir.
Type: Application
Filed: Mar 14, 2011
Publication Date: Nov 17, 2011
Inventor: AVIEL AMIT (HOLON)
Application Number: 13/046,814
International Classification: B63C 11/16 (20060101);