WO2012073749A1 - Appareil de réglage de flottabilité pour plongée sous-marine - Google Patents

Appareil de réglage de flottabilité pour plongée sous-marine Download PDF

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Publication number
WO2012073749A1
WO2012073749A1 PCT/JP2011/076853 JP2011076853W WO2012073749A1 WO 2012073749 A1 WO2012073749 A1 WO 2012073749A1 JP 2011076853 W JP2011076853 W JP 2011076853W WO 2012073749 A1 WO2012073749 A1 WO 2012073749A1
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WO
WIPO (PCT)
Prior art keywords
buoyancy
air
scuba diving
screw member
diver
Prior art date
Application number
PCT/JP2011/076853
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English (en)
Japanese (ja)
Inventor
服部　清次
吉澤　徹夫
Original Assignee
日本潜水機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2010270131A external-priority patent/JP2012056556A/ja
Application filed by 日本潜水機株式会社 filed Critical 日本潜水機株式会社
Publication of WO2012073749A1 publication Critical patent/WO2012073749A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/18—Air supply
    • B63C11/22—Air supply carried by diver
    • B63C11/2245—With provisions for connection to a buoyancy compensator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C2011/026—Diving harnesses, or the like, e.g. for carrying breathing air tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/04—Resilient suits
    • B63C11/08—Control of air pressure within suit, e.g. for controlling buoyancy ; Buoyancy compensator vests, or the like
    • B63C2011/085—Buoyancy compensator vests

Definitions

  • the present invention relates to a buoyancy adjustment device used in scuba diving.
  • the product currently on the market is a bag-like buoyant body that is airtight as a buoyant body, integrated with the holding harness for the air tank for scuba diving, and if the buoyancy is insufficient in water, the bag-like buoyancy A method is used in which an appropriate amount of air from the air tank is introduced into the body, the buoyancy is adjusted by that amount, and when the buoyancy becomes excessive, a separately provided exhaust valve is opened and exhausted to reduce buoyancy.
  • the internal air is compressed or expanded by changing the diving depth, so that the volume becomes small or large and the buoyancy fluctuates. Therefore, the diver who is a user needs to pay attention to buoyancy adjustment by taking in and out the air inside the buoyancy body every time the depth changes.
  • a buoyancy adjustment device for scuba diving has been developed in which a container with a certain capacity is used as a buoyancy body, and an appropriate amount of seawater is taken in and out to adjust the buoyancy (see Patent Document 1).
  • this buoyancy adjusting device there is a problem that the seawater put inside the buoyancy body moves depending on the posture of the diver and the balance in the water greatly fluctuates and is difficult to use.
  • JP 53-2897 A (first page) JP-A-8-127390 (first page)
  • a cylinder formed of a hard material as a buoyancy body is hermetically closed at either the upper end or the lower end, and is substantially piston-shaped that moves in the middle.
  • the buoyancy can be varied by forming an intermediate wall and changing the effective volume of the cylinder by moving the position of the intermediate wall.
  • the buoyancy adjusting device for scuba diving in order to counter the increase in pressure applied to the cylinder as a buoyant body as the depth increases, it is similar to the second stage regulator for respiration.
  • An air supply device may be provided to supply air from a diving air tank.
  • the buoyancy adjusting device for scuba diving when the depth decreases, the pressure applied to the cylinder as the buoyant body decreases, and therefore the intermediate wall or the end face of the cylinder that is airtightly closed and the vicinity thereof
  • an exhaust valve using a one-way valve may be provided to discharge excess air.
  • a cylinder serving as a buoyancy body is provided on a pair of left and right air tanks. it can.
  • the buoyancy is varied by moving the intermediate wall.
  • a multi-thread screw is provided at the center of the intermediate wall. It is possible to move the intermediate wall by rotating the screw member by penetrating a screw member such as the above and providing a nut member on the intermediate wall.
  • the nut member of the intermediate wall is required to be airtight, but as an effective solution, the inner diameter portion is matched to the external shape of the screw member.
  • the sealing member formed by the cylindrical soft material is loaded into the sealing member receiving portion formed slightly larger than the outer shape of the sealing member provided in the central portion of the intermediate wall, and the sealing member is passed through the screw member. Is compressed by applying an appropriate load from above and below in the vertical direction, so that the gap between the screw member and the intermediate wall is eliminated and airtightness is maintained.
  • the position of the intermediate wall is substantially the same in the two cylindrical members as the buoyant bodies, and when the intermediate wall is moved, If the position is not the same, the balance of buoyancy applied to the diver is not balanced, making it difficult to use. For this reason, it is necessary to move the intermediate wall in two cylinders simultaneously by one operation.
  • a transmission member such as a gear or a toothed belt and a toothed pulley and a screw member penetrating the center of the two cylinders by the rotation shaft can be simultaneously turned.
  • the screw member is made to pass through with a small offset from the center of the intermediate wall, and the weight is reduced while preventing the rotation of the intermediate wall due to the rotation of the screw member It can be characterized by the simplification of the structure.
  • the buoyancy adjusting device for scuba diving according to the present invention, there is no buoyancy fluctuation even when the diving depth is changed, and there is a particularly advantageous effect that the buoyancy adjustment is easy and light weight.
  • FIG. 4 is a cross-sectional view taken along the line AA in FIG. 3 of the embodiment of FIG. It is sectional drawing in the air supply apparatus of the example of a form of FIG. It is operation
  • FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4 of the embodiment of FIG.
  • FIG. 1 It is a top view of the intermediate wall of the example of a form of FIG. In the buoyancy body of the form example of FIG. 1, it is sectional drawing in Example 2.
  • It consists of a back plate and a belt member for fixing the scuba diving air tank to the diver's body, and a pair of cylindrical members as buoyancy bodies are fixed to both sides of the tank on a part of the stay protruding from the back plate It is arranged so that the diver can carry with the air tank.
  • a cylinder formed of a hard material as a buoyant body is hermetically closed at its upper or lower end, and forms a substantially piston-shaped intermediate wall that moves in the middle, and the effective volume of the cylinder is moved by moving the position of the intermediate wall.
  • the buoyancy can be varied by varying the. Since the formed member is a hard material, the volume in the buoyancy body is not changed by changing the depth. Therefore, even if the diver's depth fluctuates, the buoyancy does not change.
  • an air supply device similar to a respiratory second stage regulator is provided to supply air from the diving air tank.
  • an exhaust valve with a one-way valve on the intermediate wall or the end face of the buoyant body that is hermetically closed and in the vicinity thereof so as to discharge excess air. If this exhaust valve is provided on the intermediate wall when the upper end of the cylindrical member is closed, and provided on the lower end surface when the lower end is closed, there is an advantage that water entering the air chamber can be easily discharged in a standing posture.
  • the buoyancy body is affected by changes in depth. Since no excessive pressure is applied, the constituent members can be made thin and light. For these reasons, components such as buoyancy bodies and intermediate walls may be made of plastic, and the seal between the intermediate wall and the cylindrical inner wall, which is a buoyancy body, can be a lip-shaped seal made of a soft material. There is an advantage that the necessary force can be reduced. It should be noted that the above effect can be expected by maintaining the pressure range of the internal pressure of the buoyancy body at ⁇ 100 kPa or less.
  • buoyancy bodies In order to stabilize the diver's posture in water, it is desirable to provide buoyancy bodies on the left and right pair of air tanks. In addition, this makes it easy to obtain the buoyancy as a buoyant body necessary when the diver encounters the maximum buoyancy and drifts on the sea surface. Further, in the above buoyancy body, by using a buoyancy body in which the lower end surface of the cylindrical member is hermetically closed, the position of the buoyancy body is close to the position of the diving weight attached to the waist by the diver, and the posture of the diver is further stabilized. In addition to the effect, excess air staying inside the cylindrical portion can be effectively discharged upward.
  • the buoyancy can be changed by moving the intermediate wall.
  • a screw member such as a multi-thread screw is passed through the center of the intermediate wall and a nut member is provided on the intermediate wall.
  • the intermediate wall can be moved by the rotation of the screw member. According to this, the rod does not protrude to one side unlike a normal cylinder mechanism in which a piston or the like is moved from the outside by a rod.
  • the nut member of the intermediate wall is required to be airtight.
  • a sealing member made of a cylindrical soft material whose inner diameter portion is formed in accordance with the external shape of the screw member is used. After loading the seal member receiving part formed slightly larger than the outer shape of the seal member provided in the central part and passing through the screw member, the seal member is compressed by applying an appropriate load from above and below in the vertical direction. The gap between the member and the intermediate wall is eliminated and the airtightness is maintained.
  • the friction due to the rotation of the screw is too large, the frictional force is reduced by reducing the force for compressing the seal member.
  • the airtightness of the movable screw portion which has been considered difficult in the past, has been achieved, and the overall size of the apparatus has been reduced.
  • the position of the intermediate wall is almost the same, and when the intermediate wall is moved, if the position is not the same, the balance of the buoyancy applied to the diver is not balanced and it is difficult to use. For this reason, it is necessary to move the intermediate wall in two buoyancy bodies simultaneously by one operation.
  • the screw member penetrating through the center of the cylinder which is the two buoyant bodies, is rotated simultaneously by the gear and the rotating shaft.
  • the screw member is rotated in order to move the intermediate wall in the cylinder which is a buoyant body.
  • the intermediate wall rotates simultaneously with the screw member at this time, the intermediate wall does not move.
  • another shaft-shaped member is penetrated at a position away from the center of the intermediate wall, and this shaft-shaped member is fixedly held at the upper and lower end members of the cylinder.
  • airtightness between the shaft member and the intermediate wall must be ensured, and not only the sliding resistance by the seal member is increased, but if the parallelism with the screw member is poor, the sealing performance is deteriorated and the movement is deteriorated. .
  • the screw member is penetrated by being slightly offset from the center of the intermediate wall, and the weight is reduced and the structure is simplified while preventing the rotation of the intermediate wall due to the rotation of the screw member. More specifically, a preferable operation is realized by penetrating the screw member with an offset of about 2 to 3 mm with respect to the inner diameter ⁇ 140 mm of the cylinder which is a buoyant body.
  • an airtight seal is provided between the inner surface of the cylindrical part and the intermediate wall. You may do it. According to this, the same effect is acquired, without comprising the airtight seal part between the cylinder inner side surface and intermediate wall in which surface accuracy and a shape system are requested
  • a motor that rotates by electricity or compressed air can be used to rotate the screw member as means for moving the intermediate wall. According to this, by arranging the switch mechanism at hand, not only a more comfortable operation can be realized, but also a safe diving can be realized for a handicapped person with a handicap. In addition, when a diver who has difficulty in walking dives with the wheelchair, the buoyancy adjusting device may be attached to a part of the wheelchair.
  • the optimal buoyancy adjustment amount is calculated from the diver's water depth fluctuation information obtained by a pressure sensor, etc., and a considerable amount of rotation command is issued to the motor, so that the diving suit worn by the diver It is possible to keep buoyancy constant by automatically controlling buoyancy fluctuations due to depth, weight changes due to consumption of air tanks, and buoyancy changes due to samples collected from the seabed.
  • the buoyancy body is formed in a cylindrical shape, one end face is hermetically closed, a screw member is arranged so as to penetrate the vicinity of the center portion, and a movable nut member that engages with the screw member is movable.
  • a plate-shaped member is formed in the cylinder, and the plate-shaped member and the cylinder inner wall of the buoyant body are hermetically sealed by a seal member.
  • FIG. 1 is a projection view of the first embodiment from an oblique rear side
  • FIG. 2 is a projection view of the first embodiment from an oblique front side.
  • One air tank used for scuba diving is fixed to the nine back plates of FIG.
  • a pair of two buoyancy bodies are fixed to the nine back plates via 11 upper stays and 12 lower stays.
  • Each two buoyancy bodies are connected by 10 bypass pipes and their internal pressures are kept equal.
  • the diver carries the tank and the entire apparatus with a 6-shoulder belt and secures it with a 4-belt belt (this belt is not shown in FIG. 2). Breathe in the water holding an 8-second stage regulator.
  • This 5 buoyancy body has a 5 air supply device fixed on one side.
  • the air supply device is supplied with air from a 1-air tank whose pressure has been reduced via a 7 first stage regulator. This air is also supplied to an 8-second stage regulator for breathing.
  • 22 shafts are provided by 21 bearings on the bottom surface of each 2 buoyancy body, and 22 helical gears (small) in FIG. 4 are arranged on each 22 buoyancy body.
  • the 22 helical gear (small) meshes with a 24 helical gear (large) fixed to the end of a 26 multi-threaded screw member provided so as to penetrate the center of the 2 buoyancy body.
  • 3 handles are provided on the 22 shaft, and the 26 multi-threaded screw member is rotated by rotating this.
  • the buoyancy of the entire device can be varied by varying the volume of the two buoyancy bodies. If the volume is constant, the buoyancy is constant without depending on the water depth.
  • the 2 buoyancy body in FIG. 4 is provided with a 28 top plate at the upper end, and its end face is fixed in a state of being airtight with the 2a buoyancy body cylinder by a 29 O-ring.
  • a 27 bottom plate is disposed at the lower end of the two buoyancy bodies.
  • the 27 bottom plate is provided with one or more holes 27a.
  • 31 intermediate walls are arranged inside the 2a buoyant body cylinder, and its peripheral part is kept airtight with the inner wall of the 2a buoyant body cylinder by a 32 lip seal.
  • the 31 intermediate wall is provided with a 35 exhaust valve, which is a one-way valve that can exhaust the air in the 37 air chamber to the outside and does not allow water to enter from the outside.
  • a 64 valve seat is held on the 63 valve body of FIG. 7 and is pressed against the 65 valve base by a 62 spring member.
  • the spring pressure By varying the spring pressure with a 61 adjusting screw, the maximum internal pressure in the 37 air chamber can be adjusted. In the embodiment, it is set to around 4 kPa.
  • the 31 intermediate wall has a 30 multi-threaded nut member fixed near the center. Further, a cylindrical 34-seal member made of a soft material formed by connecting it to the outer shape of the 25-multi-thread member is provided. The outer diameter of this seal member is constrained by the 31 intermediate wall, and the upper end is compressed with a 30 multi-thread screw nut member and the lower end is compressed with a 33 seal holding screw, thereby maintaining the air tightness of the 31 intermediate wall and the 25 multi-thread screw member. Get drunk. When the sliding friction between the 34 seal member and the 25 multi-threaded screw member is too large, both movement and airtightness can be secured by appropriately adjusting the 33 seal holding screw.
  • the 25 multi-thread member is offset from the center of the 2a buoyant body cylinder and the 31 intermediate wall by a dimension c as shown in FIG. Accordingly, the 31 intermediate wall can move in the 2a buoyancy body cylinder by the rotation of the 25 multi-thread screw member without an additional member for suppressing the rotation direction. More specifically, a preferable operation is realized by penetrating the screw member with an offset of about 2 to 3 mm with respect to the inner diameter ⁇ 140 mm of the cylinder which is a buoyant body.
  • 5 and 6 are cross-sectional views of the five air supply device. 50 cases of this air supply device communicate with 37 air chambers with 51 vents.
  • the 45 pressure sensitive diaphragm pushes down the 44 lever, but at the same time moves the 41 valve seat carrier whose positional relationship is determined by the 42 nut.
  • a 47a hole must be formed in a part of the 47 top cover, thereby allowing movement of external water to the 45 pressure-sensitive diaphragm.
  • the air supply start pressure is determined by this spring pressure. In the embodiment, it is set to 500 Pa to 1 kPa. That is, when the pressure in the 37 air chamber becomes negative by 500 Pa to 1 kPa from the surrounding pressure, the 44 lever is pushed down so that no further negative pressure is generated, and a gap is formed between the 46 valve seat and the 48 valve cone, 49 low pressure Air is supplied through an air hose. (Fig. 6)
  • the diver feels that buoyancy is insufficient, turn the 3 handle to move the 31 intermediate wall downward and increase the volume of the 37 air chamber to increase buoyancy.
  • the air chamber is supplemented with an appropriate amount of air from the five air supply devices.
  • the 31 intermediate wall can be moved upward by turning the 3 handle in the opposite direction, and the volume of the 37 air chamber can be reduced to reduce the buoyancy.
  • the excess air in the 37 air chamber is discharged from the 35 exhaust valve and discharged to the outside through the hole 27a. Since an actual diver is in a horizontal posture, there is no practical problem even if the hole 27a is at the lower end of the figure.
  • FIG. 10 shows the same form as that of the first embodiment, but this embodiment is different from the first embodiment only in the sectional structure of the buoyancy body.
  • the 71 intermediate wall and the 28 top plate are connected by 70 bellows. This eliminates the need for a lip seal for ensuring airtightness on the outer peripheral portion of the 71 intermediate wall.
  • the 72 buoyant body cylinder is provided with a plurality of holes 72a, and the air discharged from the 35 exhaust valve does not stay due to the posture of the diver.
  • the 70 bellows is made of a lightweight and inexpensive material such as a resin material. This is because the pressure in the air chamber does not fluctuate beyond a certain range due to air supply and exhaust regardless of the diving depth, so that excessive pressure resistance characteristics are not required.
  • FIG. 11 shows an embodiment (Embodiment 3) having the same components as those in Embodiments 1 and 2 described above, and having an end face that is airtightly closed below the standing posture of the diver. Yes. Constituent elements equivalent to those of the first and second embodiments are denoted by the same reference numerals and description thereof is omitted. Note that a toothed belt 81 and a toothed pulley 82 are provided as transmission members that simultaneously move the 31 intermediate walls of the two cylinders (2a buoyant body cylinder) by one operation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention porte sur un appareil de réglage de flottabilité léger pour la plongée sous-marine, ledit appareil empêchant des changements de flottabilité, même lorsque la profondeur de plongée change, rendant facile le réglage de flottabilité et ne requérant pas de technologie de plongée spéciale. L'appareil de réglage de flottabilité qui est utilisé pour la plongée sous-marine comporte : au moins un corps flottant (2) ayant un moyen qui permet au volume effectif d'être modifié par le plongeur ; un dispositif d'alimentation en air (5) pour fournir automatiquement de l'air à partir d'une bouteille d'air comprimé (1) au corps flottant (2) selon la pression environnante ; une soupape d'évacuation automatique unidirectionnelle pour évacuer un excès d'air lorsque la pression intérieure du corps flottant (2) a augmenté ; un mécanisme variable qui peut modifier le volume du corps flottant (2) ; un moyen de fixation pour fixer un réservoir d'air de plongée sous-marine et des éléments de bande que le plongeur peut porter sur ses épaules ou sur son dos.
PCT/JP2011/076853 2010-12-03 2011-11-22 Appareil de réglage de flottabilité pour plongée sous-marine WO2012073749A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010270131A JP2012056556A (ja) 2010-08-10 2010-12-03 スキューバダイビング用浮力調整装置
JP2010-270131 2010-12-03

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WO2012073749A1 true WO2012073749A1 (fr) 2012-06-07

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004695A1 (fr) * 2013-04-18 2014-10-24 Beuchat Internat Gilet d'equilibrage pour la plongee sous-marine comprenant deux chambres arrieres independantes.
EP3475161A4 (fr) * 2016-06-24 2020-01-29 Aviad Cahana Unité de plongée à flottabilité réglable légère
US11472523B2 (en) 2018-08-22 2022-10-18 Aviad Cahana Auto-adjustable buoyancy pressure vessel for SCUBA

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS532897A (en) * 1976-06-28 1978-01-12 Dacor Corp Buoyancy compensation controller of diving respiratory device
JPH0319006A (ja) * 1989-06-16 1991-01-28 Hitachi Ltd 水中浮遊制御機構
JPH08105560A (ja) * 1994-10-04 1996-04-23 Apollo Sports:Kk 潜水具の排気バルブ
JP2007247735A (ja) * 2006-03-15 2007-09-27 Mitsubishi Material Cmi Kk 洗浄装置用排水バルブユニット
JP2008265606A (ja) * 2007-04-23 2008-11-06 Nippon Sensuiki Co Ltd ドライスーツ用排気バルブ
JP2009518375A (ja) * 2005-12-07 2009-05-07 ファーマコデックス リミテッド 局所医薬組成物
JP2010188847A (ja) * 2009-02-18 2010-09-02 Minamigumi:Kk 水中作業補助装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS532897A (en) * 1976-06-28 1978-01-12 Dacor Corp Buoyancy compensation controller of diving respiratory device
JPH0319006A (ja) * 1989-06-16 1991-01-28 Hitachi Ltd 水中浮遊制御機構
JPH08105560A (ja) * 1994-10-04 1996-04-23 Apollo Sports:Kk 潜水具の排気バルブ
JP2009518375A (ja) * 2005-12-07 2009-05-07 ファーマコデックス リミテッド 局所医薬組成物
JP2007247735A (ja) * 2006-03-15 2007-09-27 Mitsubishi Material Cmi Kk 洗浄装置用排水バルブユニット
JP2008265606A (ja) * 2007-04-23 2008-11-06 Nippon Sensuiki Co Ltd ドライスーツ用排気バルブ
JP2010188847A (ja) * 2009-02-18 2010-09-02 Minamigumi:Kk 水中作業補助装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3004695A1 (fr) * 2013-04-18 2014-10-24 Beuchat Internat Gilet d'equilibrage pour la plongee sous-marine comprenant deux chambres arrieres independantes.
EP3475161A4 (fr) * 2016-06-24 2020-01-29 Aviad Cahana Unité de plongée à flottabilité réglable légère
AU2017280850B2 (en) * 2016-06-24 2022-08-25 Avelo Labs Inc. Lightweight, adjustable bouyancy SCUBA unit
US11541975B2 (en) 2016-06-24 2023-01-03 Aviad Cahana Self-contained underwater, integrated bouyancy and breathing apparatus
US11472523B2 (en) 2018-08-22 2022-10-18 Aviad Cahana Auto-adjustable buoyancy pressure vessel for SCUBA

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