JPH08156881A - Diving apparatus in shallow sea - Google Patents

Diving apparatus in shallow sea

Info

Publication number
JPH08156881A
JPH08156881A JP34180391A JP34180391A JPH08156881A JP H08156881 A JPH08156881 A JP H08156881A JP 34180391 A JP34180391 A JP 34180391A JP 34180391 A JP34180391 A JP 34180391A JP H08156881 A JPH08156881 A JP H08156881A
Authority
JP
Japan
Prior art keywords
intake
tube
float
inspiration
pair
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
JP34180391A
Other languages
Japanese (ja)
Inventor
Yoshimasa Oonishi
巧将 大西
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Priority to JP34180391A priority Critical patent/JPH08156881A/en
Publication of JPH08156881A publication Critical patent/JPH08156881A/en
Withdrawn legal-status Critical Current

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  • Professional, Industrial, Or Sporting Protective Garments (AREA)

Abstract

PURPOSE: To provide an apparatus with which one can enjoy safely easily diving in the shallow sea without much cost after one receives the simple instruction for a short training period without needing any particular course and lisence. CONSTITUTION: A float 01 having an inspiration pipe 11 provided on the upper end with an inspiration implement 12 having a water intrusion preventing means, penetrating the float and provided on the lower end with a position stabilizing lead weight 13 and an external pressure resisting flexible inspiration tube 02 additionally provided in an interval of 1M with lead weights 23 as a buoyancy balancing means having the base connected to the lower end. Further, there are provided a connection means 03 for connecting an air storing tubes 32 of the same kind as the inspiration tube 02 and a pair of L-shaped pipes 33 connected respectively to both ends of branch pipes 31 connected to the tip of the inspiration tube 02 and a sumerged breathing mask 04 mounted respectively on both left and right sides to a pair of L-shaped pipes 33.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、5m程度の浅海におい
て簡易に潜水使用できる浅海潜水游泳器具に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shallow sea diving swimming equipment which can be used for diving in shallow water of about 5 m.

【0002】[0002]

【従来の技術】従来、潜水游泳するには、水中眼鏡を着
用した素潜りと、30cmほどの吸排気パイプの一端を
口にくわえ、他端を水面上に出して呼吸を行うシュノー
ケルを用いる方法、およびアクアラング(フランス製品
の商品名)を装備して行うスキューバダイビングがあ
る。
2. Description of the Related Art Conventionally, for diving swimming, a method of using a submarine wearing underwater glasses and a snorkel for breathing with one end of an intake / exhaust pipe of about 30 cm held in the mouth and the other end exposed above the water surface, And there is scuba diving equipped with Aqualung (brand name of French product).

【0003】[0003]

【発明が解決しようとする課題】ところで、従来の方法
は前記したように、素潜りは簡単なやり方であっても海
女などの熟練者ならいざしらず、素人にとっては極めて
短時間しか潜水することができない。また、シュノーケ
ルでは水面直下の游泳ができるだけで、吸排気パイプか
ら水が入り易く、また、唾が排除しにくいという問題点
もあり潜水というところまでにはいたっていない。さら
に、スキューバダビングにあっては、ウエストスーツや
パンツを着用したうえ水中呼吸マスク、圧縮空気ボンベ
などを装備しなければならず多額の装備費用がかかるだ
けでなく、スキューバダイビングスクールで講習を受
け、かつ海上保安局による免許を取得しなければならな
いため、潜水することが可能になるまでの所要の期間と
受講費用、免許料などが必要である。
By the way, as described above, in the conventional method, even if the elementary dive is a simple method, a skilled person such as a female diver is not invited, and an amateur can dive for an extremely short time. Can not. In addition, the snorkel can only swim under the surface of the water, water can easily enter from the intake and exhaust pipes, and saliva is difficult to remove. In addition, in scuba dubbing, you must wear a waist suit and pants and equip with an underwater breathing mask, a compressed air cylinder, etc. Not only will it cost a large amount of equipment, but you will also receive training at a scuba diving school, In addition, because you must obtain a license from the Coast Guard, it is necessary to have the necessary period to attend the dive, attendance costs, and a license fee.

【0004】本発明は、このような従来技術の問題点を
背景になされたもので、特別の講習や免許を必要とせず
一般の素人でも簡単な指導を受け僅かな練習期間で余り
費用をかけず簡易に浅海の潜水游泳を安全に楽しむこと
のできる游泳器具を提供することを目的とする。
The present invention has been made against the background of such problems of the prior art. It requires no special training or license, and even ordinary laymen receive a simple instruction and spend a little money in a short practice period. It is an object of the present invention to provide a swimming device that allows the user to easily and safely enjoy shallow-water diving swimming.

【0005】[0005]

【課題を解決するための手段】本発明は、一定の浮上姿
勢を維持するための重りを有し、上端に水浸入防止手段
を施した吸気具を備える吸気管を貫設させたフロート
と、その吸気管に基端を連結し、浮力釣合い手段を設け
た耐外圧でフレキシブルな吸気チューブと、その吸気チ
ューブの先端に連結される分岐管の両端に、前記吸気チ
ューブと同種の貯気チューブとこれらにそれぞれ連結す
るL形管との一対をそれぞれ連結してなる連結具と、そ
の一対のL形管を左右両側にそれぞれ取り付ける水中呼
吸マスクとを備えて構成したことを特徴とする浅海潜水
游泳器具を提供するものである。
DISCLOSURE OF THE INVENTION The present invention has a float having a weight for maintaining a constant floating posture and having an intake pipe provided with an intake having an upper end provided with a water penetration preventing means, An external pressure resistant and flexible intake tube having a buoyancy balance means connected to the intake pipe, and a storage tube of the same kind as the intake tube at both ends of a branch pipe connected to the tip of the intake tube. A shallow sea diving swimmer, characterized in that it is provided with a connecting tool formed by connecting a pair of L-shaped pipes respectively connected to these, and an underwater breathing mask for attaching the pair of L-shaped pipes to the left and right sides respectively. The equipment is provided.

【0006】[0006]

【作用】このように構成してあるので、水中眼鏡と水中
呼吸マスクとを着用して水深5m程度の潜水游泳を行う
と、フロートは一定の浮上姿勢を維持するため、吸気具
から水が吸気管に浸入することがない。また、耐外圧で
フレシキブルな吸気チューブおよび貯気チューブは水圧
によって凹むことがないだけでなく、浮力釣合い手段に
より浮力が抑えられるので、潜水者の自由な行動に支障
を生ずることがない。さらに一対の貯気チューブとL形
管とは、水中呼吸マスクの両側にそれぞれ取り付けてあ
るため左右の釣合いもとれているので潜水者が不都合な
偏った負荷を受けることはなく、かつ吸気も楽である。
さらにまた、排気通路も短く排出口は下方に向いている
ので、排気も楽である。これによって、潜水者は、負荷
のない自由な潜水游泳を楽々と行うことできる。
With this construction, when the underwater glasses and the underwater breathing mask are worn and the user takes a diving swim at a depth of about 5 m, the float maintains a constant floating posture, so that water is taken from the air intake device. Does not penetrate the pipe. In addition, the flexible intake and storage tubes that are resistant to external pressure are not depressed by water pressure, and buoyancy is suppressed by the buoyancy balance means, so that the free action of the diver is not hindered. Furthermore, since a pair of air storage tube and L-shaped tube are attached to both sides of the underwater breathing mask respectively, the balance between left and right is maintained, so that the diver does not receive an inconvenient biased load and intake is easy. Is.
Furthermore, since the exhaust passage is short and the exhaust port faces downward, exhausting is also easy. As a result, the diver can easily perform a free diving swimming without load.

【0007】[0007]

【実施例】以下、本発明の実施例を図面に基ずいて詳細
に説明するが、本発明はこの実施例に限定されるもので
はない。この実施例の浅海潜水游泳器具Aは、図1に示
すように、吸気管11を貫設したフロート01と、その
吸気管11に連結されたた耐外圧フレキシブルな吸気チ
ューブ02と、その吸気チュー ブ02の先端に連結さ
れる連結具03と、その連結具03に連結する水中呼吸
マスク04とから主要構成されている。
Embodiments of the present invention will now be described in detail with reference to the drawings, but the present invention is not limited to these embodiments. As shown in FIG. 1, a shallow sea diving swimming equipment A of this embodiment has a float 01 penetrating an intake pipe 11, an external pressure resistant flexible intake tube 02 connected to the intake pipe 11, and an intake tub thereof. The main components are a connecting tool 03 connected to the tip of the bush 02 and an underwater breathing mask 04 connected to the connecting tool 03.

【0008】フロート01は、図2に示すように、縦断
面小判形の中空体で、その中央上下方向に吸気管11を
貫通固定させており、フロート01上面に突出した上端
部11aに、逆山形状の吸気通路12aを形成し、水浸
入防止手段として下端に空気取入口12bを開口し、そ
の上方内部に2段の水浸入防止壁12cを突設した吸気
具12を装着している。一方、フロート01下面に突出
した下端部11bには、フロート01の浮上姿勢を常に
一定に維持するための重りとして鉛重り13を装着して
いる。
As shown in FIG. 2, the float 01 is a hollow body having an oval longitudinal section, and an intake pipe 11 is fixed through the upper and lower direction of the center of the float 01. An air intake passage 12a having a mountain shape is formed, an air intake 12b is opened at a lower end as a water intrusion prevention means, and an air intake tool 12 having a two-stage water invasion prevention wall 12c protruding from the upper part thereof is mounted. On the other hand, a lead weight 13 is attached to the lower end portion 11b projecting from the bottom surface of the float 01 as a weight for keeping the floating posture of the float 01 constant.

【0009】吸気チューブ02は、らせん状鋼線入りの
耐外圧フレキシブルな長さ約5mのチューブで、その基
端部02aを前記吸気管11の下端部11bに外嵌固着
されており、1m毎に吸気チューブ02の浮力に釣り合
う鉛重り23を取り付けている。
The intake tube 02 is a tube with a spiral steel wire that is flexible and resistant to external pressure and has a length of about 5 m. The base end 02a is externally fitted and fixed to the lower end 11b of the intake pipe 11. A lead weight 23, which balances the buoyancy of the intake tube 02, is attached to the.

【0010】連結具03は、吸気チューブ02の先端部
02bに取り付けられるほぼウの字形の分岐管31の両
端に前記吸気チューブ02と同種の貯気チューブ32と
これに連結するL形管33との一対それぞれを取り付け
てなる。
The connecting tool 03 includes an air-storing tube 32 of the same kind as the intake tube 02 and an L-shaped tube 33 connected to the same at both ends of a substantially U-shaped branch pipe 31 attached to the tip portion 02b of the intake tube 02. Each pair is attached.

【0011】水中呼吸マスク04は、図3、図4に示す
ように、ポリプロピレン製のマスク本体41前部にゴム
製の吸気弁42aを備えた吸気部42を突設するととも
に、その下方にゴム製の排気弁43aを備えて下方に向
けて開口した排出口43eを有する排気部43を垂設し
ている。なお、吸気部42の左右に前記一対のL形管3
3の先端が固着されている。また、着用時に潜水者Sの
後頭部に位置する装着帯44は、マスク本体41の後縁
と左右上下一対ずつの着脱可能な伸縮バンド45で連結
されている。吸気弁42aおよび排気弁43aは、図5
a、図5bに示すように、茸形をしたゴム製の円形弁
で、共に4個ずつの吸気口42b、排気口43bを開閉
可能に覆うように中心固定部42c、43cにより、マ
スク本体41に取り付けられている。なお、吸気口42
bは潜水者Sが楽に吸気できるように、排気口43bよ
りも大きくしてある。
As shown in FIGS. 3 and 4, the underwater breathing mask 04 has an intake portion 42 provided with a rubber intake valve 42a on the front portion of a polypropylene mask body 41, and a rubber portion is provided below the intake portion 42. An exhaust portion 43 having a manufactured exhaust valve 43a and having a discharge port 43e opening downward is vertically provided. In addition, the pair of L-shaped pipes 3 are provided on the left and right sides of the intake portion 42.
The tip of 3 is fixed. In addition, the wearing band 44 located on the back of the head of the diver S when worn is connected to the rear edge of the mask body 41 by a pair of detachable elastic bands 45 on the left and right sides. The intake valve 42a and the exhaust valve 43a are shown in FIG.
As shown in FIG. 5A and FIG. 5B, the mask main body 41 is a mushroom-shaped circular valve made of rubber, and center fixing portions 42c and 43c are provided to cover four intake ports 42b and four exhaust ports 43b so as to be openable and closable. Is attached to. The intake port 42
b is larger than the exhaust port 43b so that the diver S can easily take in air.

【0012】次に、本発明の実施例の作用を説明する。
この浅海潜水游泳器具Aを使用するには、まず、水中眼
鏡(不図示)をかけ水中呼吸マスク04を顔に密着させ
て着用し、フロート01を水面に浮かべて潜水游泳す
る。このとき、フロート01は鉛重り13により常に一
定の姿勢を維持しつつ浮遊し、吸気具12を水面から沈
めることはないので水浸入防止壁12cと相俟って水を
混入させることなく空気の取り入れを可能としている。
また、吸気チューブ02は耐外圧フレキシブルであるた
め、さらに鉛重り23により吸気チューブ02も連結具
03もその浮力を抑え釣り合わせてあるので、潜水者S
に不当な制止力を及ぼすことなくその行動を自在にして
いる。
Next, the operation of the embodiment of the present invention will be described.
In order to use this shallow sea diving swimming equipment A, first, underwater glasses (not shown) are put on and the underwater breathing mask 04 is worn in close contact with the face, and the float 01 is floated on the surface of the water for diving. At this time, the float 01 floats while maintaining a constant posture by the lead weight 13 and does not sink the air intake tool 12 from the water surface. Therefore, the float 01 cooperates with the water infiltration prevention wall 12c to prevent air from entering. It is possible to take in.
Further, since the intake tube 02 is flexible against external pressure, the lead weight 23 further balances the buoyancy of the intake tube 02 and the connecting tool 03, so that the diver S
It allows its actions freely without exerting an unreasonable stopping power.

【0013】連結具03は、潜水者Sの顔の両側に貯気
チューブ32を位置させ釣り合わせているので、潜水者
Sに不具合な偏った負荷をかけることがなく、また水中
呼吸マスク04へ吸気が入る直前に設けられた2組の貯
気チューブ32とL形管とに空気が貯溜されているため
潜水者Sは楽に吸気することができる。さらに、排気通
路43dが短く排出口43eが下方に開口しているの
で、その内部の水面も図4に示すように、排気弁43a
の下方で止まるため排気による水の押し出し量も少なく
吐く力が弱くて済むので楽である。
Since the connecting tool 03 positions and balances the air storage tubes 32 on both sides of the face of the diver S, the diver S is not subjected to an unbalanced biased load, and the submersible breathing mask 04 is provided. Since the air is stored in the two sets of the storage tubes 32 and the L-shaped tubes provided immediately before the intake of air, the diver S can easily inhale. Further, since the exhaust passage 43d is short and the discharge port 43e is opened downward, the water surface inside the exhaust passage 43d is also as shown in FIG.
Because it stops below the water, the amount of water pushed out by the exhaust is small and the force to exhale is weak, so it is easy.

【0014】以上、本発明の実施例を説明したが、本発
明は必ずしもこの実施例に限定されることはなく、要旨
を逸脱しない範囲での設計変更などがあっても本発明に
含まれる。例えば、実施例では、フロートを縦断面小判
形のものとしたが、球体でも立方体でも差し支えなく、
また吸気具も逆U字形吸気通路を有するものとしてもよ
い。さらに、耐外圧フレキシブルな吸気チューブや貯気
チューブの浮力釣合い手段として1mおきに設けた鉛重
りを使用したが、鉛重りを使用せず、吸気チューブを構
成するらせん状鋼線を太いものとしチューブ自体の重量
を重くすることも考えられる。
Although the embodiment of the present invention has been described above, the present invention is not necessarily limited to this embodiment, and any modification of the design without departing from the scope of the invention is included in the present invention. For example, in the embodiment, the float has an oval vertical cross section, but it may be a sphere or a cube,
Further, the intake device may also have an inverted U-shaped intake passage. In addition, a lead weight provided every 1 m was used as a buoyancy balance means for the external pressure resistant flexible intake tube and air storage tube. However, without using the lead weight, the spiral steel wire forming the intake tube was made thick It is also possible to increase the weight of itself.

【0015】[0015]

【発明の効果】上記のように、本発明は、一定の浮上姿
勢を維持するための重りを有し、かつ、上端に水浸入防
止手段を施した吸気具を備える吸気管を貫設したフロー
トと、その吸気管に基端を連結し、浮力釣合い手段を設
けた耐外圧でフレキシブルな吸気チューブと、その吸気
チューブの先端に連結される分岐管の両端に、前記吸気
チューブと同種の貯気チューブとこれらにそれぞれ連結
するL形管との一対をそれぞれ連結してなる連結具と、
前記一対のL形管を左右両側にそれぞれ取り付ける水中
呼吸マスクとを備えて構成したので、潜水游泳に際し特
別の講習や免許を受けたり重い装具を着用したりする必
要がなく、簡単な指導を受け僅かな練習期間を要するだ
けで余り費用もかからず安全簡易に浅海の潜水游泳がで
きる。なお、潜水者は、吸気管から水の浸入する心配が
なく、吸気チューブや連結具も浮力釣合い手段によりそ
の浮力も抑えられるため潜行に不具合いな浮力に悩まさ
れることがない。また、連結具は左右の釣り合いもとれ
ているので、偏った負荷を受けたりすることもない。そ
のうえ、吸気や排気も楽に行えることとも相俟って自由
な行動が許容されるため、潜水者は浅海の潜水游泳の素
晴らしさを満喫することができる。
As described above, according to the present invention, a float having a weight for maintaining a constant floating posture and having an intake pipe provided with an intake tool having a water intrusion prevention means at its upper end is provided through the float. An intake tube that is flexible to the external pressure and has a buoyant force balance means connected to the intake tube at its base end, and a branch pipe connected to the tip of the intake tube at both ends of the intake tube, and the same type of storage gas as the intake tube. A connecting member formed by connecting a pair of a tube and an L-shaped tube connected to each of them,
Since it is configured with an underwater breathing mask that attaches the pair of L-shaped tubes to the left and right sides respectively, there is no need for special training, license, or wearing heavy equipment during diving and swimming, and simple instruction is provided. It requires only a short training period and does not require much cost, so you can safely and easily perform a diving swimming in the shallow sea. The diver does not have to worry about the intrusion of water from the intake pipe, and the buoyancy of the intake tube and the connecting device is also suppressed by the buoyancy balancing means, so that he / she will not be troubled by the buoyancy which is not bad for diving. In addition, since the left and right balance of the connecting tool is achieved, it does not receive a biased load. In addition, since free movement is allowed in combination with easy intake and exhaust, the diver can enjoy the splendor of diving swimming in shallow water.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例に係る浅海潜水游泳器具の使用
状態における全体図である。
FIG. 1 is an overall view of a shallow sea diving swimming device according to an embodiment of the present invention in use.

【図2】本発明の実施例のフロートの縦断面図である。FIG. 2 is a vertical sectional view of a float according to an embodiment of the present invention.

【図3】本発明の実施例の水中呼吸マスクの側面図であ
る。
FIG. 3 is a side view of the underwater breathing mask according to the embodiment of the present invention.

【図4】本発明の実施例の水中呼吸マスクの縦断面図で
ある。
FIG. 4 is a vertical sectional view of an underwater breathing mask according to an embodiment of the present invention.

【図5】本発明の実施例の吸気弁と排気弁とそれぞれの
弁口の形とを示す拡大正面図で、同図aは吸気則の図、
同図bは排気側の図である。
FIG. 5 is an enlarged front view showing an intake valve, an exhaust valve, and the shapes of respective valve openings of the embodiment of the present invention, in which FIG.
FIG. B is a diagram on the exhaust side.

【符号の説明】[Explanation of symbols]

A 浅海潜水游泳器具 01 フロート 02 吸気チューブ 03 連結具 04 水中呼吸マスク 11 吸気管 12 吸気具 13 鉛重り 23 鉛重り 31 分岐管 32 貯気チューブ 33 L形管 A shallow sea diving swimming equipment 01 float 02 inhalation tube 03 connection tool 04 underwater breathing mask 11 inspiration tube 12 inhalation device 13 lead weight 23 lead weight 31 branch pipe 32 storage tube 33 L-shaped pipe

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 一定の浮上姿勢を維持するための重りを
有し、上端に水浸入防止手段を施した吸気具を備える吸
気管を貫設させたフロートと、その吸気管に基端を連結
し、浮力釣合い手段を設けた耐外圧でフレキシブルな吸
気チューブと、その吸気チューブの先端に連結される分
岐管の両端に、前記吸気チューブと同種の貯気チューブ
とこれらにそれぞれ連結するL形管との一対をそれぞれ
連結してなる連結具と、その一対のL形管を左右両側に
それぞれ取り付ける水中呼吸マスクとを備えて構成した
ことを特徴とする浅海潜水游泳器具。
1. A float having an intake pipe having a weight for maintaining a constant floating posture and having an upper end provided with a water intrusion prevention means, and a base end connected to the intake pipe. An external pressure resistant and flexible intake tube provided with a buoyancy balance means, and a storage tube of the same kind as the intake tube and an L-shaped tube connected to each of them at both ends of a branch pipe connected to the tip of the intake tube. And a pair of L-shaped pipes, and an underwater breathing mask to which the pair of L-shaped pipes are attached on the left and right sides respectively, and a shallow sea diving swimming equipment.
JP34180391A 1991-12-02 1991-12-02 Diving apparatus in shallow sea Withdrawn JPH08156881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34180391A JPH08156881A (en) 1991-12-02 1991-12-02 Diving apparatus in shallow sea

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34180391A JPH08156881A (en) 1991-12-02 1991-12-02 Diving apparatus in shallow sea

Publications (1)

Publication Number Publication Date
JPH08156881A true JPH08156881A (en) 1996-06-18

Family

ID=18348883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34180391A Withdrawn JPH08156881A (en) 1991-12-02 1991-12-02 Diving apparatus in shallow sea

Country Status (1)

Country Link
JP (1) JPH08156881A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU721878B3 (en) * 1999-09-20 2000-07-13 Wen-Chang Chiang A respiratory tube structure
CN102285434A (en) * 2011-08-23 2011-12-21 康寻达 multifunctional breathing mask
KR101353962B1 (en) * 2011-11-02 2014-01-24 박판석 Tewak with air intake
CN107512376A (en) * 2017-09-05 2017-12-26 重庆鲁科巴科技有限公司 A kind of rebreather for shallow water diving
WO2018209427A1 (en) * 2017-05-15 2018-11-22 Scheepers Anthony Snorkel with buoyant support
CN109533245A (en) * 2018-09-25 2019-03-29 中国船舶重工集团公司第七〇九研究所 Emergency gas permeable devices applied to submarine navigation device and submersible
CN110406648A (en) * 2019-08-20 2019-11-05 孙升 Anti- drowned mask

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU721878B3 (en) * 1999-09-20 2000-07-13 Wen-Chang Chiang A respiratory tube structure
CN102285434A (en) * 2011-08-23 2011-12-21 康寻达 multifunctional breathing mask
KR101353962B1 (en) * 2011-11-02 2014-01-24 박판석 Tewak with air intake
WO2018209427A1 (en) * 2017-05-15 2018-11-22 Scheepers Anthony Snorkel with buoyant support
CN107512376A (en) * 2017-09-05 2017-12-26 重庆鲁科巴科技有限公司 A kind of rebreather for shallow water diving
CN109533245A (en) * 2018-09-25 2019-03-29 中国船舶重工集团公司第七〇九研究所 Emergency gas permeable devices applied to submarine navigation device and submersible
CN110406648A (en) * 2019-08-20 2019-11-05 孙升 Anti- drowned mask

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A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 19990311