Abstract: The present invention relates to a method in connection with SCUBA diving to control a diver's buoyancy, in which method the diver (11) is equipped with diving equipment comprising at least one air pressure tank (1), a valve device (2) connected to the pressure tank (1) and arranged to supply air from said pressure tank via first supply means (5) to a breathing regulator (4) and via second supply means (7) to an inflatable diving jacket (6) in order to control the diver's buoyancy, inflation of the diving jacket being initiated when the diver has not affected the air flow through the breathing regulator (4) for a certain time period. The invention also relates to a safety device and diving equipment.

Abstract: An underwater breathing device, such as a snorkel, may include an exhalation valve. The exhalation valve is configured to produce positive end-expiratory pressure in the airway of a user of the underwater breathing device. The exhalation valve includes a plate defining an exhalation port and at least one chamber port, an exhalation conduit connected to the exhalation port, and a flexible membrane that is sealable against a surface of the plate. A lower portion of the exhalation conduit is divided by a septum which divides the exhalation conduit and the exhalation port into a first exhalation port connected to a first exhalation conduit and a second exhalation port connected to a second exhalation conduit. The flexible membrane is sized and positioned to be capable of sealing the first exhalation port and the second exhalation port.

Abstract: An underwater breathing device, such as a snorkel, may include an exhalation valve. The exhalation valve is configured to produce positive end-expiratory pressure in the airway of a user of the underwater breathing device in order to reduce the overall work of underwater breathing. The exhalation valve includes a plate defining an exhalation port. The exhalation valve also includes a flexible membrane that is sealable against a surface of the plate and is sized and positioned to be capable of sealing the exhalation port. The flexible membrane is configured to have a sealed position in which the flexible membrane seals the exhalation port such that substantially no exhaled air escapes the snorkel. The flexible membrane is also configured to have an unsealed position in which exhaled air escapes the snorkel.

Abstract: A wireless communication system includes a transmitting device and a receiving device, in which the transmitting device generates a signal including information and transmits the signal by electromagnetic waves and ultrasonic waves in the same frequency in parallel, and in which the receiving device extracts the signal from at least one of the electromagnetic waves and the ultrasonic waves transmitted from the transmitting device and acquires the information included in the extracted signal.

Abstract: A method of manufacturing a harness for a buoyancy control device, and a harness manufactured by such method. There is provided a method of manufacturing a harness for a buoyancy control device for use in a diving application, the method including the steps of: providing polymeric material; moulding the polymeric material into separate components of the harness; and connecting the components to one another so as to form the harness. A harness including a plurality of moulded polymeric components interconnected is also described.

Abstract: A waterproof structure of a respiratory tube is provided. The waterproof structure comprises a hollow body and a lid. The hollow body has a first opening end and a second opening end opposing to the first opening end. The lid pivots onto the hollow body at the first opening end. Before the lid is immersed into liquid, the gravity of the lid can keep the lid at a certain position so that the respiratory tube is well-ventilated. After a part of the lid is immersed into the liquid, the buoyancy provided by the liquid forces the closing surface thereof to substantially seal the first opening end and prevent liquid from going into the tube.

Abstract: An underwater exhaust system and method which includes an exhaust valve having a sealing edge, an exhaust outlet for exiting an exhaust gas, and a projection for directing water flow away from the exhaust valve. The exhaust valve includes a valve head and a valve stem, the valve stem being coupled with the valve head. The system and method prevent a siphoning effect, whereby leakage of water into the exhaust valve is minimized or prevented.

Abstract: A trim and position control device and method comprising a generally ring-shaped, continuous and unbroken weight formed with a central elongated opening therethrough. The opening is preferably shaped like an elliptical diamond and enables placement of the weight over a pillar valve and pillar valve rotatable pressure control handle onto the top surface of a diving tank. The bottom surface of the weight is preferably concave to promote proper nesting upon the top surface of the diving tank. The weight is secured in place by the connection of a primary stage regulator to the pillar valve of the diving tank, wherein the primary stage regulator is connected to a buoyancy compensator device and second stage regulator. This prevents the weight from being inadvertently detached. The weight enables a diver to maintain desired trim and position in conjunction with the inflation of the buoyancy compensator device.

Abstract: A portable air supply system includes a main frame for nesting paired air SCUBA cylinders therein. Saddle arms are connected for engaging the frame to pontoons of an inflatable boat. A pair of baskets are connected for carrying umbilical lines. A control box controls air flow, monitors diver status, and provides a communication link.

Abstract: The instant invention incorporates an asymmetrical purge valve tilted to fit within the confines of a chamber having a substantially elliptical cross-section. The elliptical cross-section is oriented to minimize the frontal area presented in the direction of swimming movement. The reduced cross-section results in a corresponding reduction of drag when the diver is swimming underwater.

Abstract: A compressed gas system component coupling device and method are described herein that use correlated magnets to enable a first component to be secured and removed from the second component. Some examples of components of the compressed gas system include a first stage regulator, a second stage regulator, an air pressure gauge, a dive computer, an air hose, a tank valve and a buoyancy control device. Furthermore the compression force created by the correlated magnets mounted on the first and second components create a hermetic seal therebetween.

Abstract: A diving weight apparatus has a solid, body with a curved outer conformation. An elongated aperture extends through the body between a front and a back surfaces. The elongated aperture is large enough to accept two fingers of a person's hand therein when the two fingers are arranged in side-by-side positions. A pouch accepts the body and is likewise curved. A diving vest accepts the pouch an is likewise curved.

Abstract: An improved buoyancy compensation device having a lesser change in buoyancy with depth than conventional buoyancy compensation devices which use ambient pressure bladders is disclosed. The improved device comprises one or more elastic members that, throughout the working range of diving pressures and volumes, is always elastic and, when pressurized, maintains an internal air pressure that is always greater than the ambient pressure at any dive depth. The invention also relates to a method of providing a buoyancy compensation device with an elastic member having a lift versus depth characteristic that approaches the lift versus depth characteristic of a constant or fixed volume buoyancy compensation device.

Abstract: Diving equipment easily operable by disabled persons, aged persons, etc. and wearable by oneself. The diving equipment such as buoyancy controlling device (BCD) has the function to hold a tank on the shoulder of a wearer and the function as a life jacket providing buoyancy to the wearer. In the diving equipment (BCD) of which the overall is formed in a vest-like shape, a tank holding part (2), shoulder parts (3) positioned at the both shoulder portions of a diver, and the portion (4) positioned at the center of the thoracabdominal part of the diver are formed continuously to each other so as to constitute rigid structural members. Most or all operating portions (5) are installed at the portion (4) positioned at the center of the thoracoabdominal part of the diver.

Abstract: A snorkel clip made up of two substantially rigid elements, which are designed to wrap at least half way around a snorkel tube, overmolded with a substantially flexible element to create a simple, aesthetically pleasing device. The snorkel clip also includes a hinge region created as part of the substantially flexible element. This hinge region allows the snorkel clip to flex or bend so that one of the rigid elements may be disengaged and pulled away from the riser tube of the snorkel, so that a mask strap may be attached to and removed from the snorkel, while the other rigid element remains attached to the riser tube in a generally secure manner. The substantially flexible portion may also include several cut out sections to provide visual and tactile access to portions of the substantially rigid elements for utility and aesthetic design.

Abstract: A swim and skin-dive snorkel for providing positive end-expiratory pressure for pressure-balanced exhalation. The snorkel may include inhalation and exhalation conduits. Air can be exhaled into a chamber and released when exhalation pressure within the chamber exceeds a threshold pressure. The threshold pressure that must be overcome to achieve exhalation may be balanced against the compressive forces of the ambient water pressure acting against the user's chest and lungs, which may greatly reduce the resting expiratory flow rate, the minute respiratory rate, and therefore the overall work of breathing. The exhalation pressure may be linearly matched to the ambient water pressure as a function of dive depth, thereby discouraging exhalation while diving. A purge valve may also be placed at the lower aspect of the snorkel.

Abstract: A dive computer with a free dive mode and/or wireless data transmission capabilities. In one embodiment the invention relates to a diving apparatus including a dive computer having a free dive mode, where the dive computer is configured to calculate a nitrogen loading in the free dive mode using a default value which is the fraction of oxygen in air, and where the free dive mode is used when a diver makes a dive without a self-contained underwater breathing apparatus. Another embodiment includes a method of operating a dive computer including recording two or more first identifiers, receiving pressure information from two or more pressure transmitters, the pressure information comprising second identifiers and pressure measurements, determining whether the pressure information contains one of the two or more first identifiers, and displaying a message indicative of the pressure information that contains one of the two or more first identifiers.

Abstract: A weighting belt. An illustrative embodiment of the weighting belt comprises a belt strap and a plurality of weights provided on the belt strap. Each of the plurality of weights has a head portion, a pair of tapered side portions extending from the head portion and a tapered tail portion extending from the side portions.

Abstract: The present invention relates to a safety method in connection with SCUBA diving to control a diver's buoyancy, in which method the diver (11) is equipped with diving equipment comprising at least one air pressure tank (1), a valve device (2) connected to the pressure tank (1) and arranged to supply air from said pressure tank via first supply means (5) to a breathing regulator (4) and via second supply means (7, 9, 12) to an inflatable diving jacket (6) in order to control the diver's buoyancy, an actuator (8) being able to automatically initiate inflation of the diving jacket (6) when the diver has not affected the air flow through the breathing regulator (4) for a certain time period, said actuator (8) being controlled by an actuation mechanism (20) that automatically sets the actuator in active mode when the diver is within an actuation zone (A), wherein in order additionally to improve the diver's buoyancy the actuator (8) is also arranged to automatically initiate dumping of a weight (11) carried by the

Abstract: An apparatus for underwater propulsion. The apparatus may include a hydrofoil, a buoyancy compensator connected to the hydrofoil, a tank containing air, and a controller regulating the passage of air from the tank into the buoyancy compensator. The controller may also regulate the escape of air from the buoyancy compensator. By positioning the hydrofoil underwater and alternating between positive and negative angles of attack, a diver may generate forward propulsion by manipulating the controller to correspondingly alternate the buoyant force produced by the buoyancy compensator between levels below and above neutral buoyancy.

Abstract: A leash and information system assembly includes a flexible strap, a flexible tether cord, a data processing module, and a display module. The flexible strap and the flexible tether cord connect a water sports vehicle to a user of the water sports vehicle. The flexible tether cord is connected to the flexible strap and the second end is configured and dimensioned to connect to the water sports vehicle. The tether cord width is substantially less than the strap width and the tether cord length is substantially greater than the strap length. The data processing module is mounted within a water-proof enclosure and positioned along one of the flexible strap, the flexible tether cord, and the water sports vehicle. The data processing module is configured with logic to receive, parse, process, and output data generated by a source external to the data processor.

Abstract: In an air cell of a buoyancy compensator an outer protective bag has a section of double layer construction. In the double layer area, two panels of elastic material are each juxtaposed adjacent a panel of non-elastomeric material. The elastic panels are spaced at a distance of each other such that during expansion when the elastic panels are at their limit, there is still an adjacent layer of non-elastomeric protective material. If a sharp object penetrates the elastic panel, it will not puncture the inner air cell unless it can also pierce the protective bag non-elastic layer.

Abstract: A fluid flow control valve is disclosed. This valve includes a housing which defines a central passageway having fluid inlet and fluid outlet openings. A pressure responsive element is disposed within the passageway for selectively opening and closing the inlet opening to fluid flow in response to pressure exerted thereon at the inlet opening. A mechanism is provided within the passageway for exerting a bias force against the pressure responsive element sufficient to close the inlet opening to fluid flow absent a pre-established level of pressure exerted on the pressure responsive element in opposition to the bias force. Finally, a retainer device is positioned for removably securing the pressure responsive element and bias force exerting mechanism within the passageway.

Abstract: Diving equipment easily operable by disabled persons, aged persons, etc. and wearable by oneself. The diving equipment such as buoyancy controlling device (BCD) has the function to hold a tank on the shoulder of a wearer and the function as a life jacket providing buoyancy to the wearer. In the diving equipment (BCD) of which the overall is formed in a vest-like shape, a tank holding part (2), shoulder parts (3) positioned at the both shoulder portions of a diver, and the portion (4) positioned at the center of the thoracabdominal part of the diver are formed continuously to each other so as to constitute rigid structural members. Most or all operating portions (5) are installed at the portion (4) positioned at the center of the thoracoabdominal part of the diver.

Abstract: A diving weight apparatus has a solid, body with a curved outer conformation. An elongated aperture extends through the body between a front and a back surfaces. The elongated aperture is large enough to accept two fingers of a person's hand therein when the two fingers are arranged in side-by-side positions. A pouch accepts the body and is likewise curved. A diving vest accepts the pouch an is likewise curved.

Abstract: An environmentally friendly weight block for diver's weight belt is disclosed to include a weight formed of a lead block made in the shape of an English letter and coated with a layer of anti-corrosion plastic coating, and a clip or belt loop affixed to the back side of the weight for fastening to a diver's weight belt.

Abstract: A scuba mask purging apparatus and method providing selective introduction of pressurized air into a scuba mask to initiate purging, pressure balancing, and de-fogging. An inlet valve, typically positioned conveniently on the top or the side of the mask may control the release of pressurized air into the mask. A pressure-sensitive outlet valve releases the pressurized air to force water from the mask. The outlet valve may be positioned on the lower portion of the mask or at a location where water is likely to collect.

Abstract: A snorkel has an inhalation tube and a check valve near a mouthpiece which allows air to flow toward the mouthpiece, and a float valve which closes the inhalation tube. An exhalation tube has a second check valve also located near the mouthpiece which only allows air to flow into the exhalation tube. The snorkel has a purge valve positioned below the mouthpiece. A further check valve is positioned between the inhalation tube and the exhalation tube to allow air or water in the exhalation tube to pass to the inhalation tube placed as close to the first check valve as possible. The exhalation tube outlet orifice may be closed by a simple gravity actuated valve which will float open during a dive. Alternatively the exhalation tube outlet orifice may be closed by a float valve.

Abstract: A portable air supply system includes a main frame for nesting paired air SCUBA cylinders therein. Saddle arms are connected for engaging the frame to pontoons of an inflatable boat. A pair of baskets are connected for carrying umbilical lines. A control box controls air flow, monitors diver status, and provides a communication link.

Abstract: In an air cell of a buoyancy compensator an outer protective bag has a section of double layer construction. In the double layer area, two panels of elastic material are each juxtaposed adjacent a panel of non-elastomeric material. The elastic panels are spaced at a distance of each other such that during expansion when the elastic panels are at their limit, there is still an adjacent layer of non-elastomeric protective material. If a sharp object penetrates the elastic panel, it will not puncture the inner air cell unless it can also pierce the protective bag non-elastic layer.

Abstract: Methods and compositions which can reduce the disturbance to wild life caused when man attempts to interact with wild life and more particularly methods and compositions which can enhance the interaction of man with aquatic life with minimal disturbance to the aquatic life.

Abstract: A dive belt is provided for use by divers during underwater activities, such as scuba diving. The belt comprises a body member and a weight release system which is quickly removal while the belt remains in place on the diver. A tow clip can be attached to the belt and may be used in conjunction with a surface air supply system for pulling the surface air supply system.

Abstract: A device for releasably connecting a weight pouch to a pocket of a scuba diving jacket. The device comprises a relatively flat sheath connected to and integrally with the diving jacket. A latch member is attached to the weight pouch, the latch member having arms that are elastically deformable in a plane of the sheath and sides tapered relative to a longitudinal plane of symmetry of the sheath to provide snap closure when the latch member is inserted in the sheath. An inward ly-projecting abutment inside the sheath engages ends of the arms when the device is in a closed position, thereby preventing the latch member from sliding out of the sheath. A member is provided for bending the arms of the latch member so as to release them from a position such that they meet the abutment and enable the device to be opened. The bending member includes a cap slidingly mounted on the latch member and contains tapered projections for engaging the tapered sides of the arms.

Abstract: A buoyancy compensator vest for providing adjustable buoyancy at various underwater depths by having a back portion for supporting an air tank and an air bladder for inflating and deflating, a portion of the air bladder of which is situated in the arms which surround the waist of the wearer. The improvement of an adjustment strap which can provide continuous variation within limits, of the reach of each of the inflatable arms of the vest whereby the girth of the vest can be continuously and uniformly adjusted to accommodate a wide range of body sizes, in particular waist sizes.

Abstract: An active control releasable ballast system for dive equipment is disclosed which in one embodiment includes a removable pocket that is secured with a side release buckle within a fixed pocket. The buckle is required to be opened before the weight contained in the pocket can be dropped or given to another individual in or out of the water. Thus, the release of the weights is a conscious and deliberate act.

Abstract: A carrying system for a respirator product shall be improved such that it shall have a simple design, make it possible to protect the cylinder valves and receive additional weights in a simple manner. To accomplish the object, a bracket (1) is provided, which has a U-shaped protective strap (4) in the area of the cylinder valves (28) and has a mount (15, 16, 24, 25) for a balance weight (5), which can be pushed in between the pressurized gas cylinders (18).

Abstract: A girth adjustable waist belt that easily converts to a diver's buoyancy compensator with/without integrated weight system and can also easily convert to a utility backpack and belt in which one single size will fit the general population is provided. The mega-adjustable feature also provides secure yet expandable lower back and abdominal support offering physical protection in stressful work conditions. A dive belt is also provided for use by divers during underwater activities, such as scuba diving. The belt comprises a body member and a rapid release weight system which is quickly removal while the belt remains in place on the diver. The belt can also provide for horizontally mounted supplemental air supply system, for use in the event a main air supply is lost or not wanted. In all embodiments, an elastic depth compensator can be built into the belt, insuring a snug fit of the belt at any depth. The belt has a plurality of D-rings for convenient equipment management.

Abstract: The weights in a buoyancy compensating device are placed in a pouch or pocket immediately beneath the air cell. The pocket is essentially a non-air holding extension of the buoyancy bag. In this manner, the center of gravity is now moved back, more directly in line with the center of the buoyancy bag. The buoyant forces act to directly counter the forces of the ballast weights. The improved device is more balanced in the water, very comfortable and requires less energy to maintain a diver's selected orientation in the water. The weight holding pockets can be constructed with varying degrees of stiffness relative to the air cell. The weights react to gravity and shift forward or back a few degrees depending upon whether the diver is on his back or on his stomach. The center of gravity shifts to be more in harmony with the diver's desired attitude.

Abstract: An active control releasable ballast system for dive equipment is disclosed which in one embodiment includes a removable pocket that is secured with a side release buckle within a fixed pocket. The buckle is required to be opened before the weight contained in the pocket can be dropped or given to another individual in or out of the water. Thus, the release of the weights is a conscious and deliberate act.

Abstract: A buoyancy adjustment device utilizes an inflation valve connected between the diver's breathing gas supply and a compartment to admit gas into the compartment to increase the diver's buoyancy. An exhaust valve, connects between the compartment and the outside of the vest, to release gas from the compartment to the surrounding environment to decrease the diver's buoyancy. A hand-operated controller connected to the inflation valve, when caused to move from a neutral position to an inflation position, actuates the inflation valve and admits gas to the compartment. The hand-operated controller is also connected to the exhaust valve via a flexible pushrod so that, when caused to move from the neutral position to an exhaust position, actuates the exhaust valve and releases gas from the compartment. The flexible push rod is housed in a sleeve that is totally contained within the compartment.

Abstract: The present invention relates to a structure that allows a diving mask to be attached to a buoyancy control device. By using this structure to attach the mask to the buoyancy control device, this structure provides an easy, fast and simple method of securing a scuba mask so as it is not lost, dropped, broken, stolen, etc., and also keeps the mask readily available in and out of the water. The mask can be easily attached and released.

Abstract: A dive computer with a free dive mode and/or wireless data transmission capabilities. In one embodiment the invention relates to a diving apparatus including a dive computer having a free dive mode, where the dive computer is configured to calculate a nitrogen loading in the free dive mode using a default value which is the fraction of oxygen in air, and where the free dive mode is used when a diver makes a dive without a self-contained underwater breathing apparatus. Another embodiment includes a method of operating a dive computer including recording two or more first identifiers, receiving pressure information from two or more pressure transmitters, the pressure information comprising second identifiers and pressure measurements, determining whether the pressure information contains one of the two or more first identifiers, and displaying a message indicative of the pressure information that contains one of the two or more first identifiers.

Abstract: A diving computer is provided. The diving computer includes a computer connected to a dot matrix screen to display information concerning a dive. The computer has an interface to an external personal computer for reprogrammably configuring the information displayed on the screen. The user may customize the information on one or more views of the screen in several ways. The user may select the desired information to be displayed, and may customize the size and placement of the information on one or more views. The diving computer also has a number of pre-programmed displays that may be selected, each of which present different layouts and organizations of diving related information.

Abstract: A buoyancy compensator device for divers has an expandable air chamber and at least two outlets, one arranged in an upper region and one arranged in a lower region. A manifold functionally connects the expandable air chamber and the outlets, by means of a control valve. A manifold connects the expandable air chamber to the outlets and has a control valve.

Abstract: A backpack for back-mounting a compressed-air cylinder, fastened to the backpack by a cylinder fastening belt, when a user wears harnesses and a waist belt. The backpack inlcudes a backboard (100) having support hooks (105) to support the compressed-air cylinder (50); a harness support (130) for the harnesses (30) coupled to the backboard (100) so as to rotate upwards and downwards around the center; a waist protector (120) coupled to the backboard (100) in the back of the harness support (130) so as to cover and protect the back of the user's waist; and a rotary unit for rotatably supporting both the harness support (130) and the waist protector (120) on the backboard (100). The waist protector and the harness support move separately from the backboard by the rotary unit, thus allowing the user to work without stressed by the waist belt or the harnesses.

Abstract: An underwater exhaust system includes an exhaust valve with a valve cover operatively coupled thereto. The valve cover is adapted to create an exhaled air pocket on the water interface side of the valve. The exhaled air pocket allows the valve to operate under reduced water resistance. The valve cover includes at least one water inlet passage and at least one exhaust gas opening.

Abstract: An apparatus for underwater propulsion. The apparatus may include a hydrofoil, a buoyancy compensator connected to the hydrofoil, a tank containing air, and a controller regulating the passage of air from the tank into the buoyancy compensator. The controller may also regulate the escape of air from the buoyancy compensator. By positioning the hydrofoil underwater and alternating between positive and negative angles of attack, a diver may generate forward propulsion by manipulating the controller to correspondingly alternate the buoyant force produced by the buoyancy compensator between levels below and above neutral buoyancy.

Abstract: A buoyancy compensator belt comprising a belt to which is mounted a tubular inflatable bladder positioned within a flexible housing and a small gas cylinder. In one embodiment, one or more weights are mounted onto the belt. A combination power inflation/bleed valve is operatively connected to the inflatable bladder and is fluidly connected to a first stage regulator of the gas cylinder by a hose. A dump valve is operatively connected to the bladder to prevent over-inflation and allow dumping of the air from the bladder. The buoyancy compensator belt is particularly suitable for use by free divers to allow the diver to rapidly descend to the desired depth due to the negative buoyancy produced by the weight of the belt, to allow the diver to partially inflate the inflator bladder to achieve neutral buoyancy at the desired depth, and then, when the diver wishes to ascend, to more fully inflate the inflator bladder to achieve positive buoyancy and rapidly ascend to the surface.

Abstract: A counterweight assembly is provided to enhance heads up surface positioning of a person. The assembly includes a weight/ballast member strategically disposed on a cylinder/tank worn by a diver during a dive. The weight member can be attached by several different embodiments. Preferably, the weight member is attached such that the diver cannot release or adjust the weight member while he or she is diving. The weight member rotates the person to ensure heads up surface positioning in the event the person becomes incapacitated. Also provided are several other water safety and survival devices.

Abstract: A counterweight assembly is provided to enhance heads up surface positioning of a person. The assembly includes a weight/ballast member strategically disposed on a cylinder/tank worn by a diver during a dive. The weight member can be attached by several different embodiments. Preferably, the weight member is attached such that the diver cannot release or adjust the weight member while he or she is diving. The weight member rotates the person to ensure heads up surface positioning in the event the person becomes incapacitated. Also provided are several other water safety and survival devices. Also disclosed is a combined ballast and signaling device preferably neutralized by attachment to an eccentrically buoyant personal flotation device.