JP2001108127A - Negative pressure relief valve - Google Patents
Negative pressure relief valveInfo
- Publication number
- JP2001108127A JP2001108127A JP2000058150A JP2000058150A JP2001108127A JP 2001108127 A JP2001108127 A JP 2001108127A JP 2000058150 A JP2000058150 A JP 2000058150A JP 2000058150 A JP2000058150 A JP 2000058150A JP 2001108127 A JP2001108127 A JP 2001108127A
- Authority
- JP
- Japan
- Prior art keywords
- negative pressure
- relief valve
- chamber
- port
- operating device
- 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.)
- Granted
Links
Landscapes
- Safety Valves (AREA)
Abstract
Description
【０００１】[0001]
【技術分野】本発明は、負圧が一定値に達したとき正圧
を導入する負圧リリーフ弁に関する。TECHNICAL FIELD The present invention relates to a negative pressure relief valve for introducing a positive pressure when a negative pressure reaches a constant value.
【０００２】[0002]
【従来技術及びその問題点】管路内の正圧が所定値を越
えたとき、加圧流体を大気（低圧側）に逃がすリリーフ
弁は、圧力管路に広く用いられている。一方、負圧を利
用する圧力機器において、例えば負圧容器は、生じうる
負圧の大きさに耐えられるように、肉厚や形状を設定し
ており、重く大型にならざるを得ない。しかし、負圧利
用機器で要求される負圧は、負圧容器で設定している耐
負圧ほど大きくない場合が殆どであり、負圧容器は小型
軽量化の余地がある。すなわち、負圧容器の設定耐負圧
を小さくすれば、軽量小型化が可能である。2. Description of the Related Art Relief valves for releasing pressurized fluid to the atmosphere (low pressure side) when the positive pressure in a pipeline exceeds a predetermined value are widely used in pressure pipelines. On the other hand, in a pressure device that utilizes negative pressure, for example, a negative pressure container is set to have a large thickness and shape so that it can withstand the magnitude of a possible negative pressure, and thus must be heavy and large. However, the negative pressure required by the negative pressure utilization equipment is almost always not as large as the negative pressure resistance set in the negative pressure container, and the negative pressure container has room for reduction in size and weight. That is, if the set negative pressure resistance of the negative pressure container is reduced, the weight and size can be reduced.
【０００３】[0003]
【発明の目的】本発明は、このような負圧作動機器や負
圧容器ついての問題意識に基づき、負圧が所定値を越え
たとき、つまり負圧が所定値以下となったときには、正
圧を導入できる負圧リリーフ弁を得ることを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made based on the awareness of problems with such a negative pressure operating device and a negative pressure vessel, and when the negative pressure exceeds a predetermined value, that is, when the negative pressure becomes equal to or lower than the predetermined value, a positive pressure is applied. It is intended to obtain a negative pressure relief valve capable of introducing pressure.
【０００４】[0004]
【発明の概要】本発明による負圧リリーフ弁は、負圧作
動機器の負圧室に連通する負圧ポートと、大気に開放さ
れた大気ポート；この負圧ポートと大気ポート間の流路
を開閉するリリーフ弁体；負圧作動機器の負圧室に連通
し、該負圧室の負圧によりこの負圧リリーフ弁に流路開
放方向への移動力を及ぼす負圧コントロール室；及びリ
リーフ弁体を、この負圧コントロール室の負圧によって
及ぼされる力に抗して上記流路を閉塞する方向に常時移
動付勢するばね手段；を有することを特徴としている。
この負圧リリーフ弁によれば、負圧コントロール室の負
圧がばね手段のばね力に打ち勝つ程大きくなると、大気
ポートから正圧が導入されて負圧が小さくなる（負圧室
の圧力が高くなる）から、大きすぎる負圧による機器の
破損を未然に防止できる。SUMMARY OF THE INVENTION A negative pressure relief valve according to the present invention comprises a negative pressure port communicating with a negative pressure chamber of a negative pressure operating device and an atmospheric port open to the atmosphere; a flow passage between the negative pressure port and the atmospheric port. A relief valve body that opens and closes; a negative pressure control chamber that communicates with a negative pressure chamber of a negative pressure operating device and that exerts a moving force on the negative pressure relief valve in the direction of opening the flow path by the negative pressure of the negative pressure chamber; Spring means for constantly moving and biasing the body in a direction to close the flow passage against the force exerted by the negative pressure of the negative pressure control chamber.
According to this negative pressure relief valve, when the negative pressure in the negative pressure control chamber becomes large enough to overcome the spring force of the spring means, the positive pressure is introduced from the atmospheric port and the negative pressure decreases (the pressure in the negative pressure chamber increases. ), It is possible to prevent the equipment from being damaged by an excessively large negative pressure.
【０００５】負圧コントロール室と負圧作動機器の負圧
室とを連通させる通路は、任意に形成できるが、リリー
フ弁体に形成すれば、負圧ポートと負圧作動機器とを接
続する接続管路を利用することができる。この場合、接
続管路の負圧ポート近傍の圧力変動を拾わないように、
該リリーフ弁体に一体に接続管路内に伸びる負圧導入管
を形成することが望ましい。同様の理由から、リリーフ
弁体に形成された負圧コントロール室と負圧作動機器の
負圧室とを連通させる通路には、オリフィスを形成する
ことが望ましい。[0005] A passage for communicating the negative pressure control chamber with the negative pressure chamber of the negative pressure operating device can be arbitrarily formed. However, if it is formed in a relief valve, a connection connecting the negative pressure port and the negative pressure operating device is formed. A conduit can be used. In this case, in order not to pick up the pressure fluctuation near the negative pressure port of the connection pipe,
It is desirable to form a negative pressure introducing pipe extending into the connecting pipe line integrally with the relief valve body. For the same reason, it is desirable to form an orifice in a passage communicating between the negative pressure control chamber formed in the relief valve body and the negative pressure chamber of the negative pressure operating device.
【０００６】リリーフ弁体を付勢するばね手段は、リリ
ーフ弁体に対する流路閉塞方向への移動力を調整する調
圧ばね機構から構成するのが好ましい。It is preferable that the spring means for urging the relief valve element comprises a pressure adjusting spring mechanism for adjusting a moving force of the relief valve element in the flow path closing direction.
【０００７】[0007]
【発明の実施形態】図１は、本発明による負圧リリーフ
弁の第一の実施形態を示している。バルブボディ１０
は、メインボディ１１と、このメインボディ１１に螺合
固定されるサブボディ１２とからなっている。メインボ
ディ１１には、大気ポート１３と、負圧ポート１４と、
この大気ポート１３と負圧ポート１４を連通させるとと
もにリリーフ弁体２０を摺動可能に嵌めた弁孔１５とが
穿設されている。大気ポート１３は、フィルタ１７を介
して大気に連通し、負圧ポート１４は、接続管路１８を
介して、負圧作動機器３０の負圧室３１に連通してい
る。負圧室３１は、制御弁３２を介して、負圧源３３に
接続されている。負圧作動機器３０は、負圧室３１を、
負圧源３３で発生する負圧により負圧にし、その負圧で
何らかの仕事を行う機器であり、その具体例を問わな
い。FIG. 1 shows a first embodiment of a negative pressure relief valve according to the present invention. Valve body 10
Is composed of a main body 11 and a sub-body 12 screwed and fixed to the main body 11. The main body 11 has an atmosphere port 13, a negative pressure port 14,
A valve hole 15 in which the atmosphere port 13 communicates with the negative pressure port 14 and a relief valve body 20 is slidably fitted is formed. The atmosphere port 13 communicates with the atmosphere via the filter 17, and the negative pressure port 14 communicates with the negative pressure chamber 31 of the negative pressure operating device 30 via the connection pipe 18. The negative pressure chamber 31 is connected to a negative pressure source 33 via a control valve 32. The negative pressure operating device 30 includes a negative pressure chamber 31,
It is a device that makes a negative pressure by the negative pressure generated by the negative pressure source 33 and performs some work with the negative pressure, and its specific example is not limited.
【０００８】弁孔１５の負圧ポート１４側の端部には、
負圧ポート１４側に向けて縮径するテーパ部を有する弁
座１９が固定されており、一方、リリーフ弁体２０の弁
孔１５側の端部には、この弁座１９に接離する弾性弁体
２１が設けられている。また、リリーフ弁体２０の弾性
弁体２１の反対側の端部には、伸縮密封体４０とサブボ
ディ１２によって負圧コントロール室１６が形成されて
いる。伸縮密封体４０は、リリーフ弁体２０の図の上端
部に一端部が固定された金属ベロー４１を備え、この金
属ベロー４１の他端部に一体に設けたリテイナリング４
２がメインボディ１１とサブボディ１２の間に挟着され
ている。４３は、リテイナリング４２とメインボディ１
１、サブボディ１２との間に設けたシール部材である。At the end of the valve hole 15 on the side of the negative pressure port 14,
A valve seat 19 having a tapered portion that decreases in diameter toward the negative pressure port 14 is fixed. A valve element 21 is provided. A negative pressure control chamber 16 is formed at the end of the relief valve body 20 on the opposite side of the elastic valve body 21 by the telescopic sealing body 40 and the sub-body 12. The telescopic sealing body 40 includes a metal bellows 41 having one end fixed to the upper end of the relief valve body 20 in the drawing, and a retainer ring 4 integrally provided at the other end of the metal bellows 41.
2 is sandwiched between the main body 11 and the sub-body 12. 43 is the retaining ring 42 and the main body 1
1, a seal member provided between the sub-body 12 and the sub-body 12.
【０００９】リリーフ弁体２０には、その軸部に、接続
管路１８（負圧室３１）と負圧コントロール室１６とを
連通させる弁体内通路２２が形成されている。この弁体
内通路２２には、接続管路１８（負圧室３１）側の脈動
（圧力変動）が負圧コントロール室１６側に及ぶのを減
少させるオリフィス２３が形成されている。さらに、リ
リーフ弁体２０には、弁体内通路２２に連通して接続管
路１８内に伸びる負圧導入管２４が設けられている。こ
の負圧導入管２４は、負圧ポート１４近傍の圧力変動が
弁体内通路２２に及ぼされるのを防止する。The relief valve body 20 has a valve body passage 22 formed in a shaft portion thereof to connect the connection pipe line 18 (negative pressure chamber 31) and the negative pressure control chamber 16 to each other. An orifice 23 is formed in the valve passage 22 so as to reduce the pulsation (pressure fluctuation) of the connection pipe line 18 (negative pressure chamber 31) from reaching the negative pressure control chamber 16 side. Further, the relief valve body 20 is provided with a negative pressure introducing pipe 24 which communicates with the valve body passage 22 and extends into the connection pipe line 18. The negative pressure introducing pipe 24 prevents the pressure fluctuation near the negative pressure port 14 from being applied to the valve body passage 22.
【００１０】また、リリーフ弁体２０は、調圧ばね機構
５０によって、弾性弁体２１が弁座１９に着座する方向
に移動付勢されている。この調圧ばね機構５０は、負圧
コントロール室１６内に挿入した圧縮ばね５１と、この
圧縮ばね５１のリテイナ５２と、このリテイナ５２の位
置を調節する、サブボディ１２に螺合させた調圧ノブ５
３とを備えている。調圧ノブ５３の螺合量を調節する
と、リテイナ５２の位置が変化し、その結果、圧縮ばね
５１によってリリーフ弁体２０に与えられる閉弁方向へ
の力が変化する。The relief valve body 20 is urged by a pressure adjusting spring mechanism 50 to move in a direction in which the elastic valve body 21 is seated on the valve seat 19. The pressure adjusting spring mechanism 50 includes a compression spring 51 inserted into the negative pressure control chamber 16, a retainer 52 of the compression spring 51, and a pressure adjusting knob screwed to the sub-body 12 for adjusting the position of the retainer 52. 5
3 is provided. When the screwing amount of the pressure adjusting knob 53 is adjusted, the position of the retainer 52 changes, and as a result, the force in the valve closing direction applied to the relief valve body 20 by the compression spring 51 changes.
【００１１】上記構成の本負圧リリーフ弁は、図１のよ
うに負圧作動機器３０と接続した状態では、負圧室３１
内の負圧が、接続管路１８、負圧導入管２４、弁体内通
路２２、オリフィス２３を介して負圧コントロール室１
６内に及ぼされる。しかし、その負圧によってリリーフ
弁体２０に及ぼされる開弁方向の力は、常時は調圧ばね
機構５０による閉弁方向の力より小さく、リリーフ弁体
２０の弾性弁体２１が弁座１９に着座している。よっ
て、負圧室３１に対する正圧の供給は行われない。The negative pressure relief valve having the above-described structure, when connected to the negative pressure operating device 30 as shown in FIG.
The negative pressure in the chamber is controlled by the negative pressure control chamber 1
6 within. However, the force in the valve opening direction exerted on the relief valve body 20 by the negative pressure is always smaller than the force in the valve closing direction by the pressure adjusting spring mechanism 50, and the elastic valve body 21 of the relief valve body 20 is applied to the valve seat 19. I'm sitting. Therefore, the supply of the positive pressure to the negative pressure chamber 31 is not performed.
【００１２】これに対し何らかの原因で、負圧室３１内
の負圧が一定値を超え、負圧コントロール室１６を介し
てリリーフ弁体２０に及ぼされる開弁方向の力が、調圧
ばね機構５０の力に打ち勝つと、リリーフ弁体２０は、
圧縮ばね５１を撓ませながら開弁し、大気ポート１３か
らの大気を負圧室３１に導く。よって、大きすぎる負圧
の発生は防止される。そして、負圧室３１内の負圧が許
容値に復帰すれば、調圧ばね機構５０により、リリーフ
弁体２０は閉弁位置に復帰し、負圧室３１への大気の導
入は停止され、以上の動作が繰り返される結果、負圧室
３１内の負圧は一定の範囲に保たれる。オリフィス２３
と負圧導入管２４は、負圧室３１内の圧力変動をフィル
タリングして負圧コントロール室１６に及ぼす作用を
し、リリーフ弁体２０の脈動を防止する。リリーフ弁体
２０の開弁開始圧力は、調圧ばね機構５０によって調整
することができる。On the other hand, for some reason, the negative pressure in the negative pressure chamber 31 exceeds a certain value, and the force in the valve opening direction applied to the relief valve body 20 via the negative pressure control chamber 16 is applied to the pressure adjusting spring mechanism. When the force of 50 is overcome, the relief valve 20
The valve is opened while the compression spring 51 is flexed, and the atmosphere from the atmosphere port 13 is guided to the negative pressure chamber 31. Therefore, generation of an excessively large negative pressure is prevented. When the negative pressure in the negative pressure chamber 31 returns to the allowable value, the relief valve body 20 returns to the valve closing position by the pressure adjusting spring mechanism 50, and the introduction of the atmosphere into the negative pressure chamber 31 is stopped. As a result of the above operations being repeated, the negative pressure in the negative pressure chamber 31 is kept in a certain range. Orifice 23
And the negative pressure introducing pipe 24 filters the pressure fluctuation in the negative pressure chamber 31 and acts on the negative pressure control chamber 16 to prevent pulsation of the relief valve body 20. The valve opening start pressure of the relief valve body 20 can be adjusted by the pressure adjusting spring mechanism 50.
【００１３】図２は、本発明による負圧リリーフ弁の第
二の実施形態を示している。この実施形態は、各構成部
材の形状の相違を除き、メインボディ１１とサブボディ
１２をロックリング１０’で接続した点、負圧コントロ
ール室１６をローリングダイアフラム１６Ｒとサブボデ
ィ１２で形成した点、リリーフ弁体２０に弁体内通路２
２、負圧導入管２４を設ける代わりに、負圧導入管路３
４で、負圧作動機器３０の負圧室３１と負圧コントロー
ル室１６とを接続した点、及び伸縮密封体４０を設ける
ことなく負圧コントロール室１６を形成した点が第一の
実施形態との主たる相違点である。第一の実施形態と同
一機能の構成要素には、同一の符号を付した。この実施
形態によっても、基本的には第一の実施形態と同様の負
圧リリーフ機能を得ることができる。FIG. 2 shows a second embodiment of the negative pressure relief valve according to the present invention. This embodiment is different from the first embodiment in that a main body 11 and a sub-body 12 are connected by a lock ring 10 ', a negative pressure control chamber 16 is formed by a rolling diaphragm 16R and a sub-body 12, except for a relief valve. Body passage 2 in body 20
2. Instead of providing the negative pressure introducing pipe 24, a negative pressure introducing pipe 3
4, the point that the negative pressure chamber 31 of the negative pressure operating device 30 and the negative pressure control chamber 16 are connected, and that the negative pressure control chamber 16 is formed without providing the expandable sealing body 40 is different from the first embodiment. This is the main difference. The components having the same functions as those of the first embodiment are denoted by the same reference numerals. According to this embodiment, a negative pressure relief function basically similar to that of the first embodiment can be obtained.
【００１４】[0014]
【発明の効果】以上のように本発明の負圧リリーフ弁
は、負圧で作動する負圧作動機器に接続して用いること
により、過大な負圧が生じるのを未然に防止して機器の
破損を防ぐことができ、負圧容器の設定耐負圧を小さく
して、小型軽量化を図ることができる。As described above, the negative pressure relief valve of the present invention is connected to a negative pressure operating device which operates at a negative pressure, thereby preventing an excessive negative pressure from occurring and preventing the device from operating. Breakage can be prevented, and the set negative pressure resistance of the negative pressure container can be reduced, thereby reducing the size and weight.
【図１】本発明による負圧リリーフ弁の一実施形態を示
す断面図である。FIG. 1 is a sectional view showing one embodiment of a negative pressure relief valve according to the present invention.
【図２】本発明による負圧リリーフ弁の別の実施形態を
示す断面図である。FIG. 2 is a sectional view showing another embodiment of the negative pressure relief valve according to the present invention.
１０ バルブボディ １１ メインボディ １２ サブボディ １３ 大気ポート １４ 負圧ポート １５ 弁孔 １６ 負圧コントロール室 １７ フィルタ １８ 接続管路 １９ 弁座 ２０ リリーフ弁体 ２１ 弾性弁体 ２２ 弁体内通路 ２３ オリフィス ２４ 負圧導入管 ３０ 負圧作動機器 ３１ 負圧室 ３２ 制御弁 ３３ 負圧源 ４０ 伸縮密封体 ４１ 金属ベロー ４２ リテイナリング ５０ 調圧ばね機構 ５１ 圧縮ばね ５２ リテイナ ５３ 調圧ノブ DESCRIPTION OF SYMBOLS 10 Valve body 11 Main body 12 Subbody 13 Atmospheric port 14 Negative pressure port 15 Valve hole 16 Negative pressure control chamber 17 Filter 18 Connection pipeline 19 Valve seat 20 Relief valve 21 Elastic valve 22 Valve passage 23 Orifice 24 Negative pressure introduction Pipe 30 Negative pressure operating device 31 Negative pressure chamber 32 Control valve 33 Negative pressure source 40 Telescopic seal 41 Metal bellows 42 Retainer ring 50 Pressure adjustment spring mechanism 51 Compression spring 52 Retainer 53 Pressure adjustment knob
Claims (4)
ートと、大気に開放された大気ポート；この負圧ポート
と大気ポート間の流路を開閉するリリーフ弁体；上記負
圧作動機器の負圧室に連通し、該負圧室の負圧によりこ
の負圧リリーフ弁に流路開放方向への移動力を及ぼす負
圧コントロール室；及び上記リリーフ弁体を、この負圧
コントロール室の負圧によって及ぼされる力に抗して上
記流路を閉塞する方向に常時移動付勢するばね手段；を
有することを特徴とする負圧リリーフ弁。A negative pressure port communicating with a negative pressure chamber of a negative pressure operating device; an atmospheric port open to the atmosphere; a relief valve for opening and closing a flow path between the negative pressure port and the atmospheric port; A negative pressure control chamber which communicates with a negative pressure chamber of the operating device and exerts a moving force in a direction of opening the flow path on the negative pressure relief valve by the negative pressure of the negative pressure chamber; A negative pressure relief valve comprising: spring means for constantly moving and biasing the flow path in a direction to close the flow path against a force exerted by a negative pressure of the chamber.
て、負圧コントロール室と負圧作動機器の負圧室とを連
通させる通路が、リリーフ弁体に形成されていて、該リ
リーフ弁体に一体に、負圧ポートと負圧作動機器とを接
続する接続管路内に伸びる負圧導入管が設けられている
負圧リリーフ弁。2. The relief valve according to claim 1, wherein a passage for communicating the negative pressure control chamber and the negative pressure chamber of the negative pressure operating device is formed in the relief valve body. A negative pressure relief valve integrally provided with a negative pressure introducing pipe extending into a connection conduit connecting the negative pressure port and the negative pressure operating device.
て、リリーフ弁体に形成された負圧コントロール室と負
圧作動機器の負圧室とを連通させる弁体内通路に、オリ
フィスが形成されている負圧リリーフ弁。3. The negative pressure relief valve according to claim 2, wherein an orifice is formed in a valve body passage that communicates a negative pressure control chamber formed in the relief valve body with a negative pressure chamber of the negative pressure operating device. Negative pressure relief valve.
負圧リリーフ弁において、上記ばね手段は、リリーフ弁
体に対する流路閉塞方向への移動力を調整する調圧ばね
機構からなる負圧リリーフ弁。4. The negative pressure relief valve according to claim 1, wherein said spring means comprises a pressure adjusting spring mechanism for adjusting a moving force of said relief valve body in a flow path closing direction. Pressure relief valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000058150A JP3455491B2 (en) | 1999-08-05 | 2000-03-03 | Negative pressure relief valve |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11-222252 | 1999-08-05 | ||
| JP22225299 | 1999-08-05 | ||
| JP2000058150A JP3455491B2 (en) | 1999-08-05 | 2000-03-03 | Negative pressure relief valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001108127A true JP2001108127A (en) | 2001-04-20 |
| JP3455491B2 JP3455491B2 (en) | 2003-10-14 |
Family
ID=26524777
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000058150A Expired - Fee Related JP3455491B2 (en) | 1999-08-05 | 2000-03-03 | Negative pressure relief valve |
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| Country | Link |
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| JP (1) | JP3455491B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100946528B1 (en) | 2002-12-27 | 2010-03-11 | 두산인프라코어 주식회사 | Shockless relief valve |
| CN110486511A (en) * | 2019-09-06 | 2019-11-22 | 新乡航空工业(集团)有限公司 | A kind of pressure regulator valve |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872570U (en) * | 1981-11-11 | 1983-05-17 | 厚木自動車部品株式会社 | Negative pressure control valve |
| JPS5891071U (en) * | 1981-12-16 | 1983-06-20 | 日立建機株式会社 | Direct acting relief valve |
| JPS5998168U (en) * | 1982-12-23 | 1984-07-03 | カヤバ工業株式会社 | pressure control valve |
| JPS6193680U (en) * | 1984-11-26 | 1986-06-17 | ||
| JPS63123873U (en) * | 1987-02-03 | 1988-08-11 | ||
| JPH044575U (en) * | 1990-04-28 | 1992-01-16 | ||
| JPH06159313A (en) * | 1992-11-18 | 1994-06-07 | Kayaba Ind Co Ltd | Relief valve |
| JPH09177705A (en) * | 1995-12-27 | 1997-07-11 | Hitachi Constr Mach Co Ltd | Relief valve with accumulator |
| JPH10231718A (en) * | 1997-02-19 | 1998-09-02 | Aichi Mach Ind Co Ltd | Blowby gas flow rate control valve |
-
2000
- 2000-03-03 JP JP2000058150A patent/JP3455491B2/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5872570U (en) * | 1981-11-11 | 1983-05-17 | 厚木自動車部品株式会社 | Negative pressure control valve |
| JPS5891071U (en) * | 1981-12-16 | 1983-06-20 | 日立建機株式会社 | Direct acting relief valve |
| JPS5998168U (en) * | 1982-12-23 | 1984-07-03 | カヤバ工業株式会社 | pressure control valve |
| JPS6193680U (en) * | 1984-11-26 | 1986-06-17 | ||
| JPS63123873U (en) * | 1987-02-03 | 1988-08-11 | ||
| JPH044575U (en) * | 1990-04-28 | 1992-01-16 | ||
| JPH06159313A (en) * | 1992-11-18 | 1994-06-07 | Kayaba Ind Co Ltd | Relief valve |
| JPH09177705A (en) * | 1995-12-27 | 1997-07-11 | Hitachi Constr Mach Co Ltd | Relief valve with accumulator |
| JPH10231718A (en) * | 1997-02-19 | 1998-09-02 | Aichi Mach Ind Co Ltd | Blowby gas flow rate control valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100946528B1 (en) | 2002-12-27 | 2010-03-11 | 두산인프라코어 주식회사 | Shockless relief valve |
| CN110486511A (en) * | 2019-09-06 | 2019-11-22 | 新乡航空工业(集团)有限公司 | A kind of pressure regulator valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3455491B2 (en) | 2003-10-14 |
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