JPH0276975A - Pressure regulating valve - Google Patents
Pressure regulating valveInfo
- Publication number
- JPH0276975A JPH0276975A JP22474088A JP22474088A JPH0276975A JP H0276975 A JPH0276975 A JP H0276975A JP 22474088 A JP22474088 A JP 22474088A JP 22474088 A JP22474088 A JP 22474088A JP H0276975 A JPH0276975 A JP H0276975A
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- chamber
- pressure chamber
- valve
- overpressure
- 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
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 9
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000006641 stabilisation Effects 0.000 abstract 2
- 238000011105 stabilization Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
- 230000000644 propagated effect Effects 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Safety Valves (AREA)
Abstract
Description
【発明の詳細な説明】
(産業上の利用分野)
本発明は、ディーゼル機関の排気弁を駆動するエアスプ
リング装置等における圧縮圧力発生装置の圧力供給装置
に適用される圧力調整弁に関するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a pressure regulating valve applied to a pressure supply device of a compression pressure generating device in an air spring device or the like that drives an exhaust valve of a diesel engine. .
(従来の技術)
前記圧縮圧力発生装置の従来例を第3図によりて説明す
ると、圧力変動を繰り返す圧縮室(圧力室)(B)を有
し、該圧縮室(B)は一定の圧力を供給する圧力供給管
(A) Kオリフィスを介して連設され、圧力供給管(
A)から一定の圧力がオリフィス(qを介して圧縮室(
B)K供給される圧力供給装置を備えている。(Prior Art) A conventional example of the compression pressure generating device will be explained with reference to FIG. 3. It has a compression chamber (pressure chamber) (B) in which the pressure repeatedly fluctuates, and the compression chamber (B) has a constant pressure. Pressure supply pipe (A) Connected via K orifice, pressure supply pipe (A)
A constant pressure is applied from the orifice (q) to the compression chamber (
B) Equipped with a pressure supply device supplied with K.
(発明が解決しよう゛とする課題)
従来の前記圧力供給装置は、圧力供給管と圧力室(圧縮
室)間にオリフィスを介し連設しているため、圧力室側
の圧力変動が圧力供給管へ伝わって脈動が発生したり、
圧力供給管の温度が上昇し、また、圧力室内に外部より
油等の液体が入り込むと、圧力室内の圧縮圧力が過度に
上昇し、圧縮ピストンの作動モードが変化したり圧縮量
圧力が上昇する原因となり、圧力室の強度に係わるなど
の問題点がある。(Problems to be Solved by the Invention) In the conventional pressure supply device, the pressure supply pipe and the pressure chamber (compression chamber) are connected via an orifice, so that pressure fluctuations on the pressure chamber side affect the pressure supply. It is transmitted to the tube and causes pulsation,
When the temperature of the pressure supply pipe increases and liquid such as oil enters the pressure chamber from the outside, the compression pressure inside the pressure chamber increases excessively, causing the compression piston's operating mode to change or the compression amount pressure to increase. This causes problems such as the strength of the pressure chamber.
本発明は、前記のような課題に対処するために開発され
たものであって、その目的とする処は、圧力供給管側の
一定圧力の圧力室への自動供給、圧力室側の過圧の自動
排出ならびに圧力供給管側への圧力変動の伝播?防止し
て、圧力室側の圧力確保、安定とともに圧力供給管側の
圧力も安定せしめて圧力供給性能、作動信頼性を向上し
た圧力供給弁を提供するにある。The present invention was developed to address the above-mentioned problems, and its purpose is to automatically supply constant pressure to the pressure chamber on the pressure supply pipe side, and to prevent overpressure on the pressure chamber side. automatic discharge and propagation of pressure fluctuations to the pressure supply pipe side? It is an object of the present invention to provide a pressure supply valve that prevents the above problems, secures and stabilizes the pressure on the pressure chamber side, and also stabilizes the pressure on the pressure supply pipe side, thereby improving pressure supply performance and operational reliability.
(課題を解決するための手段)
本発明は、一定の圧力を供給する圧力供給管と圧力変動
を繰り返す圧力室との間に介装して連設される圧力調整
弁であって、圧力供給管側の接続口と圧力室側の接続口
および排出系側の排出口を有するハウジングと、該ハウ
ジング内に配置され圧力室側の圧力が設定圧以上の過圧
になるとバネ付勢に抗して摺動し圧力室側の接続口と排
出口間の過圧排出路を開路する過圧排出用バルブと、該
過圧排出用バルブ内に配置され圧力室側の圧力が圧力供
給管側の圧力よりも低くなると逆方向のバネ付勢に抗し
て摺動し前記両接続口間の圧力供給路を開路する圧力供
給用バルブを具備した構成に特徴を有し、圧力供給用バ
ルブは圧力室側の圧力低下によって作動して圧力供給路
を開路し一定圧力を圧力室へ供給して所望最低圧を確保
し、過圧排出用バルブは圧力室側の過圧によって作動し
過圧排出路を開路して核過圧な排出系へ排出し、圧力室
内の圧力を所望範囲内に自動制御するとともに、両バル
ブによって圧力供給管側への圧力室側の圧力変動の伝播
を防止する。(Means for Solving the Problems) The present invention is a pressure regulating valve that is interposed and connected between a pressure supply pipe that supplies a constant pressure and a pressure chamber that repeatedly fluctuates in pressure. A housing that has a connection port on the pipe side, a connection port on the pressure chamber side, and a discharge port on the discharge system side, and a housing that is placed inside the housing and resists the spring bias when the pressure on the pressure chamber side becomes overpressure above the set pressure. An overpressure discharge valve that slides to open an overpressure discharge path between the pressure chamber side connection port and the discharge port, and an overpressure discharge valve that is arranged inside the overpressure discharge valve so that the pressure on the pressure chamber side is connected to the pressure supply pipe side. The structure is characterized by a pressure supply valve that opens the pressure supply path between the two connection ports by sliding against the spring bias in the opposite direction when the pressure becomes lower than the pressure. The overpressure discharge valve is activated by the pressure drop on the pressure chamber side to open the pressure supply path and supply constant pressure to the pressure chamber to ensure the desired minimum pressure. The pressure inside the pressure chamber is automatically controlled within the desired range by opening the circuit and discharging the nuclear overpressure into the exhaust system, and both valves prevent pressure fluctuations on the pressure chamber side from propagating to the pressure supply pipe side.
(作用)
圧力室側の圧力が圧力供給管の一定の圧力よりも低くな
ると、圧力供給用バルクがバネ付勢に抗し作動されて圧
力供給路が開路され、圧力供給管側の1定の圧力が圧力
供給路を経て圧力室側へ供給され同圧力室内の圧力の所
望最低圧が確保され、圧力室内が設定圧以上の過圧にな
ると、過圧排出用バルブがバネ付勢に抗し作動されて過
圧排出路が開路され、同過圧が排出口を経て排出系へ排
出され圧力室内の圧力が所望範囲内に自動制御されると
ともに、前記両バルブにより圧力室内の圧力変動が圧力
供給管側へ伝わらず、圧力室内の圧力が補正、安定され
、圧力供給管内の圧力も安定される。(Function) When the pressure on the pressure chamber side becomes lower than the constant pressure on the pressure supply pipe, the pressure supply bulk is actuated against the spring bias to open the pressure supply passage, and the pressure on the pressure supply pipe side is Pressure is supplied to the pressure chamber through the pressure supply path to ensure the desired minimum pressure in the pressure chamber, and when the pressure chamber becomes overpressure higher than the set pressure, the overpressure discharge valve resists the spring bias. When activated, the overpressure discharge path is opened, and the overpressure is discharged to the discharge system through the discharge port, and the pressure within the pressure chamber is automatically controlled within the desired range. The pressure inside the pressure chamber is corrected and stabilized without being transmitted to the supply pipe side, and the pressure inside the pressure supply pipe is also stabilized.
(実施例)
第1図および第2図に本発明の一実施例を示し、図中(
la、b)はハウジング部材(1a)と(1b)の螺合
、連結(よって形成されたハウジング、(2a)はハウ
ジング部材(1a)側に突設された圧力供給管(A)
(1111の接続口、(211+)はハウジング部材(
lb)@に突接された圧力室(B)@の接続口、(記)
はハウジング部材(1b)の側部に突設された排出系(
D)Nの排出口、(3)はハウジング部材(la) (
lb)内(摺動可能に配設され九過圧排出用/署ルズ、
(4)は過圧排出用ノζルプ(3)を閉側にバネ付勢(
4a)t、九バネ(4)、(5)は過圧排出用バルブ(
3)内に摺動可能に配置された圧力供給用バルブ、(6
)は圧力供給用バルブ(5)を閉@(バネ付勢(6b)
シた逆側のバネであり 、一定の圧力を供給する圧力供
給管(ト)と圧力変動を繰り返す圧力室の)との間に介
装して連設される圧力調整弁a1であって、圧力供給W
(A)側の接続口(2a)と圧力室(B)@の接続口
(21))および排出系(D)lの排出口(2d)を有
するハウジング(Ia、b)と、ハウジング(Ia、N
内に配置され圧力室(Bl 側の圧力が設定圧以上の過
圧になるとバネ付勢(4a)に抗して摺動し圧力室(B
)側の接続口(2b)と排出口(列)間の過圧排出路(
7)を開路する過圧排出用バルブ(3)と、過圧排出用
バルブ(3)内に配置され圧力室(B)@の圧力が圧力
供給管(AINの圧力より4低くなると、逆方向のバネ
付勢(6b)に抗して摺動し両接続口(2a) (Zt
))間の圧力供給路(8a、b、c)を開路する圧力供
給用バルブ(5)を具備した圧力調整弁α0になってい
る。(Example) An example of the present invention is shown in FIGS. 1 and 2, and (
la, b) are the housing members (1a) and (1b) screwed together and connected (thus, the housing formed), (2a) is the pressure supply pipe (A) protruding from the housing member (1a) side
(1111 connection port, (211+) is the housing member (
lb) Pressure chamber (B) @ connection port in contact with @, (described)
is a discharge system (
D) N discharge port, (3) is housing member (la) (
lb) inside (slidably arranged 9 overpressure discharge/signals,
(4) is the spring biasing (
4a) t, nine springs (4) and (5) are overpressure discharge valves (
3) a pressure supply valve slidably arranged in (6);
) closes the pressure supply valve (5) @ (spring biased (6b)
A pressure regulating valve a1 is a spring on the opposite side of the upper side, and is interposed and connected between a pressure supply pipe (g) that supplies a constant pressure and a pressure chamber (of a pressure chamber that repeatedly fluctuates), Pressure supply W
A housing (Ia, b) having a connection port (2a) on the (A) side, a connection port (21) of the pressure chamber (B) @), and a discharge port (2d) of the discharge system (D)l; , N
When the pressure on the pressure chamber (Bl side) becomes overpressure above the set pressure, it slides against the spring bias (4a) and opens the pressure chamber (Bl).
) side connection port (2b) and the overpressure discharge path (
7) When the overpressure discharge valve (3) opens and the pressure in the pressure chamber (B) @ located inside the overpressure discharge valve (3) becomes 4 lower than the pressure in the pressure supply pipe (AIN), the reverse direction Both connection ports (2a) (Zt
)) The pressure regulating valve α0 is equipped with a pressure supply valve (5) that opens the pressure supply path (8a, b, c) between the two.
前記過圧排出用バルブ(3)は、図示のよう罠ハウジン
グ部材(1a)の腔内に摺動可能に配置されてシー九部
材釦より接続口(2a)の内側腔内がシールされ、ハウ
ジング部材(1b)の内壁との間に、接続口(2b)と
排出口(2A)間で開閉される過圧排出路(7)を形成
し、前記圧力供給用メルノ(5)は、過圧排出用バルブ
(3)の腔内に摺動可能に配置されてシール部材九より
同腔内をシールし、過圧排出用バルブ(3)の中央部に
貫設された中央孔(8a)に対設されて、過圧排出用バ
ルブ(3)の腔内壁との間に開閉路(8b)を設けて通
路(8C)を介し接続口(2b)に連通可能な圧力供給
路(8a、b、c)を形成しており、前記バネ(4)は
、ハウジング部材(1a)と過圧排出用バルブ(3)間
に介装され同バルブ(3)を矢示方向にバネ付勢(4a
) して過圧排出路(力を閉路し、前記バネ(6)は、
ハウジング部材(1b)と圧力供給用ノζルプ(5)間
に介装され、同バルブ(5)を逆方向の矢示方向にバネ
付勢(61:+) して圧力供給路(8a、b、c)を
閉略し、バネ(4)のバネ付勢(4a)に対しバネ(6
)の逆方向のバネ付勢(6b)を程よく小さく調整して
いる。The overpressure discharge valve (3) is slidably disposed in the cavity of the trap housing member (1a) as shown in the figure, and the interior of the inner cavity of the connection port (2a) is sealed by the seal member button, and the housing is closed. An overpressure discharge path (7) that is opened and closed between the connection port (2b) and the discharge port (2A) is formed between the inner wall of the member (1b), and the pressure supply mellow (5) is configured to discharge overpressure. It is slidably arranged in the cavity of the discharge valve (3) to seal the cavity from the sealing member 9, and is inserted into the central hole (8a) penetrated through the center of the overpressure discharge valve (3). Pressure supply paths (8a, b) are provided opposite to each other, and are capable of communicating with the connection port (2b) via the passageway (8C) by providing an opening/closing path (8b) between the overpressure discharge valve (3) and the inner wall of the cavity. , c), and the spring (4) is interposed between the housing member (1a) and the overpressure discharge valve (3) and biases the valve (3) in the direction of the arrow (4a).
) to close the overpressure outlet (force), and the spring (6)
A pressure supply path (8a, b, c) are closed, and the spring (6) is pressed against the spring bias (4a) of the spring (4).
) is adjusted to a moderately small spring bias (6b) in the opposite direction.
従って、圧力供給管(A)の一定の圧力(Pa )に対
し、圧力室(B)側の変動する圧力(Pb)が低くなる
と、圧力供給用バルブ(5)がバネ付勢(6b)K抗し
て図示左動され開閉路(8b)が閉略されて、圧力供給
管(A)側の圧力(Pa)が接続口(2a)から圧力供
給路(13a、b。Therefore, when the fluctuating pressure (Pb) on the pressure chamber (B) side becomes lower than the constant pressure (Pa) of the pressure supply pipe (A), the pressure supply valve (5) is activated by the spring bias (6b) K. The opening/closing path (8b) is closed by moving to the left in the figure, and the pressure (Pa) on the pressure supply pipe (A) side is transferred from the connection port (2a) to the pressure supply paths (13a, b).
C)、接続口(2b)を経て圧力室(B)へ供給され、
過圧排出用バルブ(3)は過圧排出路(7)を閉路して
おり、圧力(Pa)の所望最低圧が確保される。C), is supplied to the pressure chamber (B) via the connection port (2b),
The overpressure discharge valve (3) closes the overpressure discharge path (7), and the desired minimum pressure (Pa) is ensured.
圧力供給W +A)の一定の圧力(Pa )に対し、圧
力室(B)@の圧力(Pb)が高くなりさらに設定圧以
上になって過圧になると、過圧の圧力(Pb)により圧
力供給用バルブ(5)が圧力供給路(8a、b、c)の
閉路な保ち図示右動され過圧排出用バルブ(3)をバネ
付勢(3a)に抗し図示右動して過圧排出路(7)を閉
略し、圧力室(B)の過圧が接続口(2b)から過圧排
出路(7)、排出口(2i)を経て排出系(D)へ排出
され、圧力室(B)内の過圧が自動的に解消される。When the pressure (Pb) in the pressure chamber (B) increases against a constant pressure (Pa ) of the pressure supply W The supply valve (5) is moved to the right as shown to keep the pressure supply paths (8a, b, c) closed, and the overpressure discharge valve (3) is moved to the right as shown against the spring bias (3a) to release the overpressure. The discharge path (7) is closed, and the overpressure in the pressure chamber (B) is discharged from the connection port (2b) through the overpressure discharge path (7) and the discharge port (2i) to the discharge system (D), and the pressure chamber Overpressure in (B) is automatically eliminated.
圧力室(Bl内の圧力(Pb)が設定値よりも低下する
と、バネ付勢(4a) (41))のバランスにより過
圧排出用バルブ(3)が、圧力供給用バルブ(5)が第
1図に示すように復帰し、過圧排出路(7)、圧力供給
路(8a。When the pressure (Pb) in the pressure chamber (Bl) decreases below the set value, the overpressure discharge valve (3) is activated and the pressure supply valve (5) is activated due to the balance of the spring bias (4a) (41)). As shown in Figure 1, the overpressure discharge path (7) and pressure supply path (8a) are restored.
b、a)が自動的に閉路され、圧力室(Bl内の圧力(
Pb)、+!l″−所望範囲内圧自動制御される。b, a) are automatically closed and the pressure in the pressure chamber (Bl (
Pb), +! 1″-The internal pressure within the desired range is automatically controlled.
前記圧力供給用バルブ(5)と過圧排出用バルブ(3)
の関連作動により、圧力供給管(A)の一定の圧力が圧
力室(B)へ自動供給されて圧力室(B)内の所望最低
圧が確保され、圧力室(B)内の設定圧以上の過圧は排
出系へ自動排出され圧力室(B)の所望液大王が設定さ
れて、圧力室内の圧力(Pb)が所定範囲内に自動制御
されるとともに、圧力室内の圧力変動が圧力供給室内へ
伝わらない。圧力室内の最大圧力制御範囲は、バネ(4
) 、 (6)のノ2ネ付勢力によって調整される。The pressure supply valve (5) and the overpressure discharge valve (3)
Due to the related operation, a constant pressure of the pressure supply pipe (A) is automatically supplied to the pressure chamber (B), and the desired minimum pressure in the pressure chamber (B) is secured, and the set pressure in the pressure chamber (B) is exceeded. The overpressure in the pressure chamber is automatically discharged to the discharge system, and the desired liquid level in the pressure chamber (B) is set, and the pressure in the pressure chamber (Pb) is automatically controlled within a predetermined range, and the pressure fluctuation in the pressure chamber is adjusted to the pressure supply. It doesn't get transmitted indoors. The maximum pressure control range in the pressure chamber is determined by the spring (4
) and (6) are adjusted by the biasing force.
(発明の効果)
本発明は、前述のような構成になっており、圧力室側の
圧力が低下すると、圧力供給バルブが作動されて圧力供
給路が閉略され、圧力供給管側の一定の圧力が圧力室内
へ自動供給されて所望最低圧が確保されるとともに、圧
力室側の圧力が設定圧以上の過圧になると、過圧排出用
バルブが作動されて過圧排出路が閉略され、圧力室側の
過圧が排出口から排出系へ排出されて、圧力室内の圧力
が所望範囲内に自動制御され、前記両バルブによって圧
力室内の前記所望最低圧以上の圧力は圧力供給管側へ伝
わらず、圧力供給管側の脈動、@度上昇が防止されると
ともに、圧力室側の過圧も防止されて、圧力室側の圧力
が補正、安定され圧力供給管側の圧力も安定されて圧力
供給性能、作動信頼性が著しく向上されている。(Effects of the Invention) The present invention has the above-described configuration, and when the pressure on the pressure chamber side decreases, the pressure supply valve is operated and the pressure supply path is closed, and a certain level of pressure on the pressure supply pipe side is maintained. Pressure is automatically supplied into the pressure chamber to ensure the desired minimum pressure, and when the pressure on the pressure chamber side becomes overpressure above the set pressure, the overpressure discharge valve is activated and the overpressure discharge path is closed. , the overpressure in the pressure chamber side is discharged from the discharge port to the discharge system, the pressure in the pressure chamber is automatically controlled within the desired range, and the pressure in the pressure chamber above the desired minimum pressure is released to the pressure supply pipe side by both valves. This prevents pulsation and temperature rise on the pressure supply pipe side, prevents overpressure on the pressure chamber side, corrects and stabilizes the pressure on the pressure chamber side, and stabilizes the pressure on the pressure supply pipe side. The pressure supply performance and operational reliability have been significantly improved.
以上本発明を実施例について説明したが、勿論本発明は
このような実施例にだけ局限されるものではなく、本発
明の精神を逸脱しない範囲内で種々の設計の改変を施し
うるものである。Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .
第1図は本発明の一実施例を示す縦断面図、第2図は本
発明の配置図、第3図は従来例の機構図である。
A:圧力供給管 B:圧力室
la、t+:ハウジング 2a、2b:接続口2d:
排出口 3:過圧供給用バルブ5:圧力供給用
バルブ 4a、6b :バネ付勢7:過王排出路
ga、b、c :王力供給路代 理 人 弁理士 岡
本 重 文
外2名FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a layout diagram of the present invention, and FIG. 3 is a mechanical diagram of a conventional example. A: Pressure supply pipe B: Pressure chamber la, t+: Housing 2a, 2b: Connection port 2d:
Discharge port 3: Overpressure supply valve 5: Pressure supply valve 4a, 6b: Spring biased 7: Overpressure discharge path
ga, b, c: Royal power supply route agent: Patent attorney: Shige Okamoto, 2 other persons
Claims (1)
圧力室との間に介装して連設される圧力調整弁であって
、圧力供給管側の接続口と圧力室側の接続口および排出
系側の排出口を有するハウジングと、該ハウジング内に
配置され圧力室側の圧力が設定圧以上の過圧になるとバ
ネ付勢に抗して摺動し圧力室側の接続口と排出口間の過
圧排出路を開路する過圧排出用バルブと、該過圧排出用
バルブ内に配置され圧力室側の圧力が圧力供給管側の圧
力よりも低くなると逆方向のバネ付勢に抗して摺動し前
記両接続口間の圧力供給路を開路する圧力供給用バルブ
を具備したことを特徴とする圧力調整弁。A pressure regulating valve that is interposed and connected between a pressure supply pipe that supplies a constant pressure and a pressure chamber that repeatedly fluctuates in pressure, and that has a connection port on the pressure supply pipe side, a connection port on the pressure chamber side, and A housing that has a discharge port on the discharge system side, and a connection port and a discharge port on the pressure chamber side that are placed inside the housing and slide against the spring bias when the pressure on the pressure chamber side becomes overpressure above the set pressure. An overpressure discharge valve that opens an overpressure discharge passage between A pressure regulating valve comprising a pressure supply valve that slides to open a pressure supply path between the two connection ports.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22474088A JP2690961B2 (en) | 1988-09-09 | 1988-09-09 | Pressure regulating valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22474088A JP2690961B2 (en) | 1988-09-09 | 1988-09-09 | Pressure regulating valve |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0276975A true JPH0276975A (en) | 1990-03-16 |
JP2690961B2 JP2690961B2 (en) | 1997-12-17 |
Family
ID=16818498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22474088A Expired - Fee Related JP2690961B2 (en) | 1988-09-09 | 1988-09-09 | Pressure regulating valve |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2690961B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030068382A (en) * | 2002-02-14 | 2003-08-21 | 가부시키가이샤 니프코 | Two-way valve |
KR100513057B1 (en) * | 2002-02-14 | 2005-09-05 | 가부시키가이샤 니프코 | Two-way valve |
-
1988
- 1988-09-09 JP JP22474088A patent/JP2690961B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030068382A (en) * | 2002-02-14 | 2003-08-21 | 가부시키가이샤 니프코 | Two-way valve |
KR100513057B1 (en) * | 2002-02-14 | 2005-09-05 | 가부시키가이샤 니프코 | Two-way valve |
Also Published As
Publication number | Publication date |
---|---|
JP2690961B2 (en) | 1997-12-17 |
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