JPS6217474A - Gas discharger valve - Google Patents

Gas discharger valve

Info

Publication number
JPS6217474A
JPS6217474A JP15547485A JP15547485A JPS6217474A JP S6217474 A JPS6217474 A JP S6217474A JP 15547485 A JP15547485 A JP 15547485A JP 15547485 A JP15547485 A JP 15547485A JP S6217474 A JPS6217474 A JP S6217474A
Authority
JP
Japan
Prior art keywords
outer cylinder
pressure
section
movable stopper
outer tube
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.)
Pending
Application number
JP15547485A
Other languages
Japanese (ja)
Inventor
Hiroshi Muramoto
邑本 廣志
Shinji Yoshioka
吉岡 伸治
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP15547485A priority Critical patent/JPS6217474A/en
Publication of JPS6217474A publication Critical patent/JPS6217474A/en
Pending legal-status Critical Current

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  • Safety Valves (AREA)

Abstract

PURPOSE:To prevent high-pressure sea water from infiltrating into a pressure container by providing a spring energizing a movable plug cover section toward the outer tube projection side to perform sealing between the movable plug cover section and outer tube projection side. CONSTITUTION:A movable plug 2 is constituted with a cylindrical skirt section 2b sliding on the inner periphery of an outer tube 1 and an upper cover section 2c blocking the upper end of the skirt section. A collar section 2d with a diameter larger than that of the inner periphery of the outer tube 1 is formed on the peripheral section of the cover section 2c and forms a seal section between it and the projection side of the outer tube 1. A spring 3 suspended across a beam 1b provided at the lower end section of the outer tube 1 and a fulcrum 2e provided at the inner side of the cover section 2c of the movable plug 2 energizes so that the cover section 2c of the movable plug 2 and the upper end section of the outer tube 1 are sealed.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、潜水物体の浮上装置の浮袋等に設けら・れ、
その内部のガス圧を浮上装置の浮上とともに変化する外
圧から所定の圧力の許容限度内に制限する場合などに用
いる気体放出弁に関する。
[Detailed Description of the Invention] [Industrial Application Field] The present invention is provided in a floatation bag of a flotation device for a diving object, etc.
The present invention relates to a gas release valve used to limit the internal gas pressure to within a predetermined permissible pressure limit from the external pressure that changes as the flotation device floats.

〔従来の技術〕[Conventional technology]

従来のこの種の気体放出弁について第9図によシ説明す
る。同図で101は浮袋等の圧力容器の外側105と内
側106ヲ分ける圧力容器104の壁に固着された外筒
でその円筒部および頂部に連通孔101aが設けられで
ある。
A conventional gas release valve of this type will be explained with reference to FIG. In the figure, 101 is an outer cylinder fixed to the wall of the pressure vessel 104 that separates the outer side 105 and the inner side 106 of the pressure vessel such as a swim bladder, and a communication hole 101a is provided in the cylindrical portion and the top thereof.

102は外筒101の内部全上下動するように設けられ
た可動栓で、外筒101の円筒部にあけられた連通孔1
01a t−開閉する位置に移動することができる。
Reference numeral 102 denotes a movable stopper that is provided so as to move up and down completely inside the outer cylinder 101, and a communication hole 1 made in the cylindrical part of the outer cylinder 101.
01a t-Can be moved to open/close position.

103は、可動栓102i外筒101内の下方に設けら
れた突起101bに押付けるためのバネである。このよ
うな気体放出弁全潜水物を浮上させる装置に使用した場
合の作用について説明する。
103 is a spring for pressing the movable stopper 102i against the protrusion 101b provided below in the outer cylinder 101. The effect when such a gas release valve is used in a device for surfacing a fully submersible object will be explained.

圧力容器104に充填する気体の発生、若しくは浮上装
置の上昇により圧力容器104の内側106の圧力が外
側105の圧力よシ所定値以上に上昇すると、バネ10
3の付勢力にさからって。
When the pressure on the inside 106 of the pressure vessel 104 rises to a predetermined value or more compared to the pressure on the outside 105 due to the generation of gas filling the pressure vessel 104 or the rise of the flotation device, the spring 10
Against the urging force of 3.

可動栓102を押上げ、連通孔101a f開き、内側
106の気体全外側105に逃がす。また気体排出によ
シ、内側106の圧力が低下すると、バネ103が可動
栓102全押下げ、連通孔101a 全閉じ、圧力容器
の内外全遮断する。
The movable stopper 102 is pushed up to open the communication holes 101a to 101f, and the gas in the inside 106 is completely released to the outside 105. Further, when the pressure inside the inside 106 decreases due to gas discharge, the spring 103 fully pushes down the movable stopper 102, completely closes the communication hole 101a, and completely shuts off the inside and outside of the pressure vessel.

以上の作用により、圧力容器104の内側106の圧力
?外側105の圧力より所定の圧力だけ高い許容値以内
に保ち、内側106および外側105の圧力差による圧
力容器104の破壊全防止することができる。
Due to the above action, the pressure inside 106 of pressure vessel 104? By keeping the pressure within an allowable value that is higher than the pressure on the outside 105 by a predetermined pressure, the pressure vessel 104 can be completely prevented from being destroyed due to the pressure difference between the inside 106 and the outside 105.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

しかしながら、上述の従来の気体放出弁?深々度潜水物
体の浮上装置の浮袋等の気体放出弁として使用する場合
、圧力容器104の外部105の圧力は海水圧力によシ
非常に高くなるが、圧力容器104.内部106の圧力
は、浮上動作に移る迄は、はぼ大気圧のままに保几れる
。このため外部105の高圧海水の内部106への侵入
上貼ぐには、可動栓102と外筒101の嵌合すきまを
厳しく制限しなければならない。
However, the conventional gas release valve mentioned above? When used as a gas release valve for a floatation bag of a flotation device for a deep diving object, the pressure at the outside 105 of the pressure vessel 104 becomes extremely high due to seawater pressure. The pressure in the interior 106 is maintained at approximately atmospheric pressure until the floating operation begins. Therefore, in order to prevent high-pressure seawater from entering the interior 106 of the exterior 105, the fitting clearance between the movable plug 102 and the outer cylinder 101 must be strictly limited.

一方、深々度潜水物体の浮上装置に用いられる浮袋等の
圧力容器は、第6図に示すように通常小さく折り几たん
で潜水物体に区画された部分に収納できる柔軟性全必要
とすることから。
On the other hand, as shown in Figure 6, pressure vessels such as swim bladders used in flotation devices for deep-diving objects usually require flexibility so that they can be folded into a small size and stored in compartments of the submersible object. .

その耐圧強度は余9大きくでき念鳴ず、内側106およ
び外側105の圧力差を大きくすることが出来ず、この
ため可動栓102を押上げる力も余シ大きくできない。
The pressure resistance strength cannot be increased by 9 degrees without causing a ringing noise, and the pressure difference between the inside 106 and the outside 105 cannot be increased, and therefore the force for pushing up the movable stopper 102 cannot be increased by much.

このため前述のように可動栓102と外筒101の嵌合
すきま?厳しく制限すると、可動栓102の動きが阻害
され連通孔101aの開閉が円滑に行なわれなくなシ、
気体放出弁の作動不良全列き起す欠点がある。
Therefore, as mentioned above, the fitting clearance between the movable plug 102 and the outer cylinder 101? If it is severely restricted, the movement of the movable stopper 102 will be inhibited and the communication hole 101a will not open and close smoothly.
There is a drawback that malfunction of the gas release valve may occur.

本発明は、このような従来の気体放出弁の欠点全解消し
高圧海水の圧力容器内への侵入防止と円滑な作動音はか
った気体放出弁を提供すること全目的とする。
It is an object of the present invention to provide a gas release valve that eliminates all of the drawbacks of the conventional gas release valve, prevents high pressure seawater from entering a pressure vessel, and operates smoothly and with low noise.

〔問題点全解決するための手段〕[Means to solve all problems]

このため9本発明の気体放出弁は1両端が開口した円筒
状の外筒と、外筒突出側全閉鎖すべくその上部に外筒内
径より大径の鍔部七有する蓋部とその下部に外筒内部全
自在に摺動するスカート部とからなる可動栓と、可動栓
が外筒突出側へ移動したとき外筒の内外全連通すべく可
動栓スカート部にあけられた貫通孔と、可動栓蓋部と外
筒突出側との間のシール全行うべく可動栓蓋部全外筒突
出側へ付勢するバネとからなることを特徴とし、いわゆ
るポペット弁(PoppetValve)とスプール弁
(Spool Valve)ノ機能全1個のパルプにそ
なえたものである。
For this reason, the gas release valve of the present invention has a cylindrical outer cylinder with both ends open, a lid portion having a flange with a diameter larger than the inner diameter of the outer cylinder on the upper part to completely close the protruding side of the outer cylinder, and a lid portion on the lower part thereof. A movable stopper consisting of a skirt part that fully slides inside the outer cylinder, a through hole drilled in the movable stopper skirt part to fully communicate the inside and outside of the outer cylinder when the movable stopper moves toward the protruding side of the outer cylinder, and the movable stopper. It is characterized by a spring that biases the movable stopper cover toward the entire outer cylinder protrusion side in order to completely seal between the stopper cover and the outer cylinder protrusion side, and is a so-called poppet valve and a spool valve. ) functions are all provided in one pulp.

〔作用〕[Effect]

上述の本発明の気体放出弁によれば、ポペット弁に相当
する可動栓の蓋部と外筒突出部分がスプール弁に相当す
る可動栓のスカート部分と外筒との嵌合すきまを厳しく
制限せずとも高圧海水の内部への侵入全防止する作用上
水す。
According to the above-described gas release valve of the present invention, the lid portion of the movable stopper corresponding to the poppet valve and the protruding portion of the outer cylinder severely limit the fitting clearance between the skirt portion of the movable stopper corresponding to the spool valve and the outer cylinder. It works to completely prevent high-pressure seawater from entering the interior.

〔実施例〕〔Example〕

以下図面によシ本発明の一実施例としての気体放出弁に
ついて説明すると、第1図〜第6図は本発明の気体放出
弁の第1実施例七示す図であって、第1図は縦断面図、
第2図、第3図は可動栓の側面図および正面図、第4図
は第1図の矢視M−yで示す底面図、第5図は第1図の
矢視V−■で示す横断面図、第6図は本発明の気体放出
弁の潜水物体への取付状況を示すための縦断面図である
A gas release valve as an embodiment of the present invention will be explained below with reference to the drawings. FIGS. 1 to 6 are views showing a first embodiment of the gas release valve of the present invention, and FIG. longitudinal section,
Figures 2 and 3 are side and front views of the movable stopper, Figure 4 is a bottom view shown in the direction of arrow M-y in Figure 1, and Figure 5 is shown in the direction of arrow V-■ in Figure 1. The cross-sectional view and FIG. 6 are vertical cross-sectional views showing how the gas release valve of the present invention is attached to a diving object.

1は、浮袋等の圧力容器4にその外周部が固着された円
筒状の外筒でその上、下は開放されている。そして外筒
1の下端部(内側端)に設けた突出部1aに梁1bi固
定し、後述するバネ3の一方の支点としている。
Reference numeral 1 denotes a cylindrical outer tube whose outer periphery is fixed to a pressure vessel 4 such as a swim bladder, and whose top and bottom are open. A beam 1bi is fixed to a protrusion 1a provided at the lower end (inner end) of the outer cylinder 1, and serves as one fulcrum of a spring 3, which will be described later.

2は可動栓で、外筒1の内周面を摺動する円筒状のスカ
ート部2bがその下部に設けられるとともに、スカート
部の上方端をふさぐ上部の蓋0部2Cで構成され、蓋部
2cの周縁部には。
Reference numeral 2 denotes a movable stopper, which is provided with a cylindrical skirt portion 2b that slides on the inner circumferential surface of the outer cylinder 1 at its lower part, and an upper lid portion 2C that closes the upper end of the skirt portion. At the periphery of 2c.

外筒1の内周よシも大径の鍔部2dが形成されて外筒1
の上端部(突出側)との間にシール部全形成している。
A large diameter flange 2d is also formed on the inner circumference of the outer cylinder 1.
A seal is entirely formed between the upper end (projecting side) of the

蓋部2cの内側にはバネ3の他方の支点2eが設けられ
るとともに、スカート部2Cには可動栓2が上方へ移動
したとき。
The other fulcrum 2e of the spring 3 is provided inside the lid part 2c, and the movable stopper 2 is provided on the skirt part 2C when the movable stopper 2 moves upward.

圧力容器4の外側5と内側6とを連通する貫通孔2aが
あけられている。
A through hole 2a is provided to communicate between the outside 5 and the inside 6 of the pressure vessel 4.

3は外筒1の下端部に設けた梁1bと可動栓2の蓋部2
Cの内側に設けた支点2eとの間に架は渡されたバネで
、可動栓2を下方(内側)に押しさげ可動栓2の蓋部2
cと外筒1の上端部とがシールされるよう付勢する。
3 is a beam 1b provided at the lower end of the outer cylinder 1 and a lid 2 of the movable stopper 2.
A spring is passed between the frame and the fulcrum 2e provided inside the movable stopper C, and the movable stopper 2 is pushed down (inwardly) to close the lid part 2 of the moveable stopper 2.
c and the upper end of the outer cylinder 1 are urged to be sealed.

5は圧力容器4の外側で海中などであり、6は圧力容器
4の内側で浮力用のガスなどが充満する。
5 is the outside of the pressure vessel 4, such as underwater, and 6 is the inside of the pressure vessel 4, which is filled with gas for buoyancy.

7は圧力容器4としての浮袋で折りたたむことができる
とともに内部にガス全入れてふくらませることができる
7 is a floating bladder serving as a pressure vessel 4 that can be folded and can be inflated by filling the inside with gas.

7aは折りたたんで、潜水物体8の収納室8bに収納さ
れた状態の浮袋、このとき浮袋の安全弁の外筒1の下部
は、収納室8bとガス発生室8ckつなぐ丸穴通路に嵌
合されている。
7a is a folded swim bladder stored in the storage chamber 8b of the diving object 8; at this time, the lower part of the outer cylinder 1 of the safety valve of the swim bladder is fitted into a round hole passage connecting the storage chamber 8b and the gas generation chamber 8ck; There is.

7bはガス原料9をガス化してふくらませた状態の浮袋
、このとき、浮袋に取り付けられた気体放出弁は、収納
室8bから外へ出て1.2゜4の位置からx/、 21
.4/に示すような位置に移る。
Reference numeral 7b denotes a floating bladder in which the gaseous raw material 9 is gasified and inflated; at this time, the gas release valve attached to the floating bladder exits from the storage chamber 8b at a position of 1.2°4 x/21
.. Move to the position shown in 4/.

8は潜水物体で内部の室8aに、潜水の目的達成に必要
な機器類全収容している。
8 is a diving object, and an internal chamber 8a houses all the equipment necessary to achieve the purpose of diving.

第7図は本発明の気体放出弁の第2実施例?示す縦断面
図でバネおよび外筒の突出部および梁は図示を省略して
いる。
FIG. 7 is a second embodiment of the gas release valve of the present invention. In the longitudinal cross-sectional view shown, the spring and the protrusion and beam of the outer cylinder are not shown.

第1図に示す可動栓の蓋部2Cの周縁部に設けた鍔部2
dの寸法り、、 D2は1本図に示すように[)、=D
2になるようにしてもよい。
Flange 2 provided on the periphery of the lid 2C of the movable stopper shown in FIG.
The dimension of d, D2 is [), = D as shown in the figure.
It may be set to 2.

また第8図は本発明の気体放出弁の第3実施例を示す縦
断面図で第7図と同様、1部の部材の図示全省略してい
る本図に示すように外筒1の上端部開口内周縁にテーパ
全つけるとともに。
FIG. 8 is a vertical sectional view showing a third embodiment of the gas release valve of the present invention. Similar to FIG. 7, some members are omitted. As shown in this figure, the upper end of the outer cylinder 1 is shown. At the same time, the inner periphery of the opening is fully tapered.

可動栓2の鍔部2dにテーパ全っけ接触面金大きくして
接触させるようにしてもよい。
It is also possible to contact the flange portion 2d of the movable stopper 2 by enlarging the entire taper contact surface metal.

次にその作用について述べる。Next, we will discuss its effect.

(1)圧力容器4の内側6の圧力がガス原料9のガス化
若しくは浮上とともに外側5の圧力より所定圧だけ上昇
すると、バネ3の力にさからって可動栓2七押上げ1貫
通通孔2aにより圧力容器4の内側6と外側5が連通し
、内側6の気体全外側5に逃がす。
(1) When the pressure on the inside 6 of the pressure vessel 4 increases by a predetermined pressure from the pressure on the outside 5 due to the gasification or floating of the gas raw material 9, the movable stopper 27 is pushed up against the force of the spring 3 and the through hole is opened. The inside 6 and outside 5 of the pressure vessel 4 communicate with each other through the hole 2a, and the gas in the inside 6 is completely released to the outside 5.

気体排出によシ内側6の圧力が低下すると。When the pressure inside the shell 6 decreases due to gas discharge.

バネ3の復元力により可動栓2が引下げられ貫通孔2a
2閉じ、更に安全弁の外筒1の外側の穴縁全塞ぎ、圧力
容器4の内外全完全に遮断する。
The movable plug 2 is pulled down by the restoring force of the spring 3, and the through hole 2a
2 is closed, and the outside hole edge of the outer cylinder 1 of the safety valve is completely closed, and the inside and outside of the pressure vessel 4 are completely shut off.

以上の作用によシ、内側6の圧力全圧力容器4の外側5
の圧力から一定の許容値以内に保つことができる。
Due to the above action, the pressure on the inside 6 is completely increased and the pressure on the outside 5 of the pressure vessel 4 is
The pressure can be kept within a certain tolerance.

(2)深々度潜水作業中には、圧力容器4の内圧は、は
ぼ大気圧であるがその外側は高圧海水である。その高圧
海水は、可動栓の蓋2cに働いて、その周縁部2d2外
筒1に押しつける。該押付力は海水圧力の増大につれて
大きくなるのでこの部分の密封能力は海水圧力とともに
高くなる。
(2) During deep diving work, the internal pressure of the pressure vessel 4 is approximately atmospheric pressure, but the outside is high pressure seawater. The high-pressure seawater acts on the lid 2c of the movable stopper and presses its peripheral edge 2d2 against the outer cylinder 1. Since the pressing force increases as the seawater pressure increases, the sealing ability of this portion increases as the seawater pressure increases.

〔発明の効果〕〔Effect of the invention〕

以上述べたように1本発明の気体放出弁によれば請求の
範囲に示す簡素な構成で。
As described above, the gas release valve of the present invention has a simple structure as shown in the claims.

(1)深々度潜水作業において気体放出弁に加わる高い
海水圧力は可動栓蓋部の大径部を外筒の突出側に強く押
し付けるので可動栓スカート部と外筒の内周との間隙?
小さくしなξぐても、気体放出弁の密封は完全に保つこ
とができる。
(1) During deep diving work, the high seawater pressure applied to the gas release valve strongly presses the large diameter part of the movable stopper lid against the protruding side of the outer cylinder, so there is a gap between the movable stopper skirt and the inner periphery of the outer cylinder.
Even if the size is reduced, the sealing of the gas release valve can be maintained completely.

(2)可動栓スカート部と外筒の内周との間隙を小さく
する必要がないので内部の圧力が、外圧よシも僅か高く
なる程度でも可動栓は円滑に動き内部のガス?容易に放
出し、内部の圧力全降下させることができるのでバネを
適当に選ぶことにより圧力容器内部の圧力全任意に設定
できる。
(2) Since there is no need to reduce the gap between the movable stopper skirt and the inner periphery of the outer cylinder, the movable stopper moves smoothly even if the internal pressure is slightly higher than the external pressure. Since the pressure inside the pressure vessel can be easily released and the pressure inside the vessel can be completely lowered, the pressure inside the pressure vessel can be set to any desired value by appropriately selecting a spring.

等の利点がある。There are advantages such as

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

第1図〜第6図は本発明の一実施例としての気体放出弁
を示す図であって、第1図は縦断面図、第2図、第3図
は可動栓の側面図、および正面図、第4図は第1図の矢
視■−■で示す底面図、第5図は第1図の矢視V−■で
示す横断面図、第6図は本発明の気体放出弁を潜水物体
へ取付けた状態?示す縦断面図である。 第7図は本発明の第2実施例としての気体放出弁の縦断
面図、第8図は同じく第3実施例としての気体放出弁の
縦断面図である。 第9図は従来の気体放出弁の縦断面図である。 1・・・外筒、2・・・可動栓、2a・・・貫通孔、 
 2b・・・スカート部、2c・・・蓋部、2d・・・
鍔部、3・・・バネ、4・・・圧力容器 第S図 蛸6団 第8図
1 to 6 are views showing a gas release valve as an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view, and FIGS. 2 and 3 are a side view and a front view of a movable stopper. 4 is a bottom view shown in the direction of arrows ■--■ in FIG. 1, FIG. 5 is a cross-sectional view shown in the direction of arrows V--■ in FIG. Is it attached to a diving object? FIG. FIG. 7 is a longitudinal sectional view of a gas release valve as a second embodiment of the present invention, and FIG. 8 is a longitudinal sectional view of a gas release valve as a third embodiment. FIG. 9 is a longitudinal sectional view of a conventional gas release valve. 1... Outer cylinder, 2... Movable stopper, 2a... Through hole,
2b...Skirt part, 2c...Lid part, 2d...
Flange, 3... Spring, 4... Pressure vessel Figure S, Group 6, Figure 8

Claims (1)

【特許請求の範囲】[Claims] 両端が開口した円筒状の外筒と、外筒突出側を閉鎖すべ
くその上部に外筒内径より大径の鍔部を有する蓋部とそ
の下部に外筒内部を自在に摺動するスカート部とからな
る可動栓と、可動栓が外筒突出側へ移動したとき外筒の
内側と外側とを連通すべく可動栓のスカート部にあけら
れた貫通孔と、可動栓蓋部と外筒突出側との間のシール
を行うべく可動栓蓋部を外筒突出側へ付勢するバネとか
らなることを特徴とする気体放出弁。
A cylindrical outer cylinder with both ends open, a lid part having a flange with a diameter larger than the inner diameter of the outer cylinder on the upper part to close the protruding side of the outer cylinder, and a skirt part below the lid part that freely slides inside the outer cylinder. A movable stopper consisting of a movable stopper, a through hole drilled in the skirt portion of the movable stopper to communicate the inside and outside of the outer case when the moveable stopper moves toward the outer cylinder protruding side, a movable stopper cover and the outer cylinder protrusion. 1. A gas release valve comprising a spring that biases a movable stopper lid portion toward an outer cylinder protruding side in order to perform a seal between the side and the outer cylinder.
JP15547485A 1985-07-15 1985-07-15 Gas discharger valve Pending JPS6217474A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15547485A JPS6217474A (en) 1985-07-15 1985-07-15 Gas discharger valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15547485A JPS6217474A (en) 1985-07-15 1985-07-15 Gas discharger valve

Publications (1)

Publication Number Publication Date
JPS6217474A true JPS6217474A (en) 1987-01-26

Family

ID=15606838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15547485A Pending JPS6217474A (en) 1985-07-15 1985-07-15 Gas discharger valve

Country Status (1)

Country Link
JP (1) JPS6217474A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04108002A (en) * 1990-08-29 1992-04-09 Hino Motors Ltd Sealing performance improving device for front wheel hub
JP2010281365A (en) * 2009-06-03 2010-12-16 Osaka Gas Co Ltd Protective cap for gas cock

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04108002A (en) * 1990-08-29 1992-04-09 Hino Motors Ltd Sealing performance improving device for front wheel hub
JP2010281365A (en) * 2009-06-03 2010-12-16 Osaka Gas Co Ltd Protective cap for gas cock

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