JPS6338776A - Check valve formed with orifice - Google Patents
Check valve formed with orificeInfo
- Publication number
- JPS6338776A JPS6338776A JP18104786A JP18104786A JPS6338776A JP S6338776 A JPS6338776 A JP S6338776A JP 18104786 A JP18104786 A JP 18104786A JP 18104786 A JP18104786 A JP 18104786A JP S6338776 A JPS6338776 A JP S6338776A
- Authority
- JP
- Japan
- Prior art keywords
- valve
- valve body
- passage
- chamber
- valve chamber
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 30
- 238000013016 damping Methods 0.000 description 13
- 230000007935 neutral effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
Description
【発明の詳細な説明】 ・−の１−″ この発明は、絞り付き逆上弁に関する。[Detailed description of the invention] ・-1-'' The present invention relates to a reverse valve with a throttle.
支ヱ立且」
一般に、油圧回路等においては、逆止弁と絞りとの並列
設置が必要になる場合がある０例えば、特公昭５０−４
８３５号公報においては、ダンピング室内の圧油をスプ
リング室に徐々に流出させるため、スプールとケースと
の間に絞りとしての微小間隙を形成するとともに、スプ
リング室内の圧油を速やかにダンピング室に導くため、
スプール内に逆止弁を設け、逆止弁と絞りとを並列配置
している。In general, in hydraulic circuits, etc., it may be necessary to install a check valve and a throttle in parallel.
In Publication No. 835, in order to cause the pressure oil in the damping chamber to gradually flow out into the spring chamber, a minute gap is formed as a throttle between the spool and the case, and the pressure oil in the spring chamber is quickly guided to the damping chamber. For,
A check valve is provided in the spool, and the check valve and the throttle are arranged in parallel.
−が しよ〜 る。 点
しかしながら、このような従来のものにあっては、前述
のように逆上弁と絞りとが個別に設けられているため、
構造が複雑になるとともに、多くの製作工数が必要とな
って高価になるという問題点がある。-I'm going to do it. However, in such conventional devices, as mentioned above, the reverse valve and the throttle are provided separately.
There are problems in that the structure becomes complex, and a large number of manufacturing steps are required, resulting in an increase in cost.
１ｍ占 ため −゛
このような問題点は、内部に弁室が形成されたケースと
、ケースに形成され弁室の長手方向一端および他端にそ
れぞれ開口した一対の流出入通路と、弁室内に遊嵌され
該弁室の長手方向に移動可能で、その一端面および他端
面が弁室の一端および他端にそれぞれ着座することがで
きる弁体と、該弁体内に形成され片側端が弁体の他端面
に他側端が弁体の一端面に開口する小径の絞り通路と、
前記弁体内に形成され片側端が弁体の外周面に他側端が
弁体の一端面に開口する大径の流体通路と、を備えるこ
とにより解決することができる。- ゛Such a problem is caused by a case with a valve chamber formed inside, a pair of inflow and outflow passages formed in the case and opened at one end and the other end of the valve chamber in the longitudinal direction, and an inflow and outflow passage inside the valve chamber. a valve body that is loosely fitted and movable in the longitudinal direction of the valve chamber, and whose one end surface and other end surface can be seated on one end and the other end of the valve chamber, respectively; and a valve body formed within the valve body and whose one end is a small diameter throttle passage whose other end opens to one end face of the valve body;
This problem can be solved by providing a large-diameter fluid passage formed within the valve body, one end of which opens on the outer circumferential surface of the valve body, and the other end open to one end surface of the valve body.
１月
今、一方の流出入通路から流体が弁室に流入すると、弁
体が押されて他端方向に移動し、弁体の他端面が弁室の
他端に着座する。このとき、他方の流出入通路は弁室か
ら基本的には遮断されるが、小径の絞り通路を通じて僅
かに連通する。この結果、流体は弁体により逆止されな
がら、少量ずつ弁室から他方の流出入通路に流れる。逆
に、他方の流出入通路から流体が弁室に流入すると、弁
体が押されて一端方向に移動し、弁体の一端面が弁室の
一端に着座する。この結果、弁室内と一方の流出入通路
とが遮断される。しかしながら、この弁体は弁室に遊嵌
され、また、流体通路の片側端は弁体の外周面に開口し
ているため、一方の流出入通路は絞り通路および大径の
流体通路を通じて弁室に連通ずる。このため、弁体にょ
る逆止は解除され、弁室内の流体は速やかに一方の流出
入通路に流れる。このように、絞りおよび逆上を行なう
ために１個の弁でよいので、構造が簡単となり、安価に
製作できる。Now, when fluid flows into the valve chamber from one of the inflow and outflow passages, the valve body is pushed and moves toward the other end, and the other end surface of the valve body is seated at the other end of the valve chamber. At this time, the other inflow and outflow passage is basically blocked off from the valve chamber, but is slightly communicated with through the small diameter throttle passage. As a result, the fluid flows little by little from the valve chamber to the other inflow and outflow passage while being prevented by the valve body. Conversely, when fluid flows into the valve chamber from the other inflow and outflow passage, the valve body is pushed and moved toward one end, and one end surface of the valve body is seated at one end of the valve chamber. As a result, the valve chamber and one of the inflow and outflow passages are blocked. However, this valve body is loosely fitted into the valve chamber, and one end of the fluid passage is open to the outer peripheral surface of the valve body, so one of the inflow and outflow passages passes through the throttle passage and the large diameter fluid passage into the valve chamber. It will be communicated to. Therefore, the check by the valve body is released, and the fluid in the valve chamber quickly flows to one of the inflow and outflow passages. In this way, since only one valve is required for throttling and inversion, the structure is simple and can be manufactured at low cost.
１崖１ 以下、この発明の一実施例を図面に基づいて説明する。1 cliff 1 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１．２図において、 １はポンプ、 ２はタンク、
３は例えばクローラ車両等を駆動するモータである。ポ
ンプ１、タンク２とモータ ３とは切換弁４が途中に設
けられた一対の給排路５．６によって連結され、この切
換弁４とモータ ３との間にはカウンターバランス弁１
１が設置されている。In Figure 1.2, 1 is the pump, 2 is the tank,
3 is a motor that drives, for example, a crawler vehicle or the like. The pump 1, the tank 2, and the motor 3 are connected by a pair of supply/discharge passages 5.6 in which a switching valve 4 is provided in the middle, and a counterbalance valve 1 is connected between the switching valve 4 and the motor 3.
1 is installed.
このカウンターバランス弁１】はケーシング１２を有し
、このケーシング１２内にはボベツ）１３、スプリング
１４および受け１５からなるチエツク弁１８．１７が設
けられている。ケーシング１２の両端にはカバー２０、
２１がねじ込まれ、これらのカバー２０．２１の内方側
には一対のダンピング室２２．２３が形成されている。This counterbalance valve 1 has a casing 12 in which a check valve 18, 17 consisting of a cylinder 13, a spring 14 and a receiver 15 is provided. Covers 20 are provided at both ends of the casing 12,
21 are screwed in, and a pair of damping chambers 22.23 are formed on the inner side of these covers 20.21.
これらのダンピング室２２．２３ＦＩＩｉには、ダンピ
ング室２２．２３同士を直線状に連通ずるスプール室２
４が形成され、このスプール室２４には軸方向に移動可
能なスプール２５が収納されている。前記ダンピング室
２２．２３には内部に通路２８．２９が形成された可動
部材２６．２７が設けられ、これらの可動部材２Ｂ、２
７はスプリング３０．３１によってスプール２５に向か
つて付勢され段差３２．３３に当接している。These damping chambers 22.23FIIi include a spool chamber 2 that communicates the damping chambers 22.23 with each other in a straight line.
4 is formed, and this spool chamber 24 houses a spool 25 that is movable in the axial direction. The damping chambers 22.23 are provided with movable members 26.27 having passages 28.29 formed therein, and these movable members 2B, 2
7 is urged toward the spool 25 by a spring 30.31 and comes into contact with a step 32.33.
前記スプール２５の軸方向両端部には絞り付き逆止弁４
１．４２がそれぞれ設けられ、各絞り付き逆止弁４１．
４２はケースとしてのスプール２５の内部に形成された
弁室４３を有する。各弁室４３の長手方向一端側、この
実施例ではスプール２５の軸方向外側、には止め輪４４
によりケースの一部としてのス）−／パ４５が取り付け
られ、このストッパ４５の内端面は弁室４３の一端４６
を構成する。各ストッパ４５には内端が弁室４３の一端
４８に開口する一方の流出入ａ路としての貫通孔４７が
形成され、この貫通孔４７の外端はダンピング室２２に
連通ずる。また、スプール２５の両端部には他方の流出
入通路としての連通路４Ｂが形成され、各連通路４８の
外端は前記弁室４３の他端４９に開口し、その内端はス
プール２５の中央部外周に開口する。各弁室４３内には
弁室４３より小径の弁体５５が遊嵌され、各弁体５５は
弁室４３内を弁室４３の長手方向に移動することができ
る。そして、この弁体５５の一端面５６は、該弁体５５
が一端方向に移動したとき、弁室４３の一端４６に面接
触しながら着座するシート面となり、また、弁体５５の
他端面５７は該弁体５５が他端方向へ移動したとき、弁
室４３の他端４９に面接触しながら着座するシート面と
なる。このように、弁体５５の一端面５６、他端面５７
を弁室４３の一端４８、他端４９に面接触によって着座
させるようにしているので、線接触の場合に比較してこ
れら接触面の熱処理や高精度加工は不要となり、製作費
が安価となる。前記弁体５５には有底の合流穴５８が形
成され、この合流穴５８は貫通孔４７に対向しながら弁
体５５の一端面５８に開口している。A check valve 4 with a throttle is provided at both ends of the spool 25 in the axial direction.
1.42 are respectively provided, and each throttle check valve 41.
42 has a valve chamber 43 formed inside the spool 25 as a case. A retaining ring 44 is provided at one end in the longitudinal direction of each valve chamber 43, in this embodiment, on the outer side in the axial direction of the spool 25.
A stopper 45 as a part of the case is attached, and the inner end surface of this stopper 45 is connected to one end 46 of the valve chamber 43.
Configure. Each stopper 45 is formed with a through hole 47 as one outflow/inflow path a whose inner end opens to one end 48 of the valve chamber 43 , and the outer end of this through hole 47 communicates with the damping chamber 22 . Furthermore, communication passages 4B as the other inflow and outflow passages are formed at both ends of the spool 25, and the outer ends of each communication passage 48 open to the other end 49 of the valve chamber 43, and the inner ends of the spool 25 Opens on the outer periphery of the center. A valve body 55 having a smaller diameter than the valve chamber 43 is loosely fitted into each valve chamber 43, and each valve body 55 can move within the valve chamber 43 in the longitudinal direction of the valve chamber 43. One end surface 56 of this valve body 55 is
When the valve body 55 moves toward one end, it becomes a seat surface that sits in surface contact with one end 46 of the valve chamber 43, and when the valve body 55 moves toward the other end, the other end surface 57 of the valve body 55 becomes a seat surface that is seated in surface contact with the one end 46 of the valve chamber 43. It becomes a seat surface on which one sits while making surface contact with the other end 49 of 43. In this way, one end surface 56 and the other end surface 57 of the valve body 55
are seated at one end 48 and the other end 49 of the valve chamber 43 by surface contact, so compared to the case of line contact, heat treatment and high-precision machining of these contact surfaces are not required, resulting in lower manufacturing costs. . A bottomed merging hole 58 is formed in the valve body 55 , and the merging hole 58 opens at one end surface 58 of the valve body 55 while facing the through hole 47 .
弁体５５内でその他端部には長手方向に延びる小径の絞
り通路５９が形成され、この絞り通路５９の片側端は前
記合流穴５８の底面に開口することにより合流穴５８を
介して弁体５５の一端面５６に開口する。一方、絞り通
路５９の他側端は連通路４８に対向しながら弁体５５の
他端面５７の中央部に開口する。６０は弁体５５の内部
に形成され半径方向に延びる前記絞り通路５９より大径
の流体通路であり、この流体通路６０の片側端は弁体５
５の外周面の面取部５５ａに開口して弁室４３に連通し
、一方、その他側端は合流穴５８に開口することにより
該合流穴５８を介して弁体５５の一端面５６に開口する
。A small-diameter throttle passage 59 extending in the longitudinal direction is formed at the other end of the valve body 55 , and one end of this throttle passage 59 is opened at the bottom of the merging hole 58 so that the valve body can pass through the merging hole 58 . It opens at one end surface 56 of 55. On the other hand, the other end of the throttle passage 59 opens at the center of the other end surface 57 of the valve body 55 while facing the communication passage 48 . 60 is a fluid passage formed inside the valve body 55 and extending in the radial direction and having a larger diameter than the throttle passage 59; one end of this fluid passage 60 is connected to the valve body 5.
5 and communicates with the valve chamber 43 through a chamfered portion 55 a on the outer peripheral surface of the valve body 55 , while the other side end opens into a confluence hole 58 and opens into one end surface 56 of the valve body 55 through the confluence hole 58 . do.
次に、この発明の一実施例の作用について説明する。Next, the operation of one embodiment of the present invention will be explained.
まず、切換弁４を平行流位置に切り換えると、ポンプｌ
から吐出された高圧の流体は給排路５を通じてモータ
３に流入し、一方、モータ ３から流出した低圧の流体
は給排路６を通じてタンク２に戻る。このとき、給排路
５内の流体は連通路４日を通じてスプール２５の一端面
に導びかれ、該スプール２５をスプリング３１に対抗し
て他端限まで移動させる。これにより、例えばクローラ
車両は前進する０次に、切換弁４を中立位置に切り換え
ると、給排路５，６がタンク ２に接続され、これらの
内圧がタンク圧まで低下する。この結果、スプール２５
はスプリング３１に押され中立位置に向かって一端方向
に移動しようとする。このとき、スプール２５の一端面
とダンピング室２２との間の流体が閉じ込められて高圧
となるため、絞り付き逆止弁４１の弁体５５を内端方向
に押しその他端面５７を他端４８に着座させる。この結
果、弁室４３内と連通路４Ｂが基本的に遮断されるが、
貫通孔４７は合流穴５８および小径の絞り通路５Ｓを通
じて連通路４Ｂに僅かに連通ずる。この結果、スプール
２５の一端面と可動部材２６との間の流体は弁体５５に
より逆止されながら、少量ずつ弁室４３から絞り通路５
９．連通路４８を通じて給排路５に流出し、これにより
、スプール２５を中立位置に向かって緩慢に移動させて
ハンチングを防止する。一方、スプール２５の一端方向
への移動によりダンピング室２３の容積が増大して圧力
が低下するため、絞り付き逆止弁４２の連通路４８から
流体が弁室４３に流入する。このため、絞り付き逆止弁
４２の弁体５５は外端方向に押されて移動し、その一端
面５Ｂが弁室４３の一端４Ｂに着座する。この結果、弁
室４３内と貫通孔４７とが遮断される。しかしながら、
前述のように弁体５５は弁室４３にｍｔＭされ、また、
流体通路８０の片側端は弁体５５の外周面に開口してい
るため、貫通孔４７は絞り通路５９および大径の流体通
路６０双方を通じて弁室４３に連通ずる。このため、弁
体５５による逆止は解除され、弁室４３内の流体は速や
かに流体通路８０、貫通孔４７を通じてダンピング室２
３に流入し、該ダンピング室２３におけるキャビテーシ
ョンを防止する。また、前記クローラ車両が下り坂走行
あるいは平地走行に移ったとき等にも、前述と同様にス
プール２５が移動してダンピング室２２．２３に流体が
流入あるいは流出するが、この際にも前記絞り付き逆止
弁４１．４２は同様に作動し、スプール２５の移動を緩
慢にするとともに、ダンピング室２２．２３におけるキ
ャビテーションを防止する。First, when the switching valve 4 is switched to the parallel flow position, the pump l
The high pressure fluid discharged from the
3, while the low-pressure fluid flowing out from the motor 3 returns to the tank 2 through the supply/discharge path 6. At this time, the fluid in the supply/discharge path 5 is guided to one end surface of the spool 25 through the communication path 4, and the spool 25 is moved against the spring 31 to the other end. As a result, for example, when the crawler vehicle moves forward to the zeroth order and the switching valve 4 is switched to the neutral position, the supply and discharge passages 5 and 6 are connected to the tank 2, and their internal pressures are reduced to the tank pressure. As a result, spool 25
is pushed by the spring 31 and tries to move toward one end toward the neutral position. At this time, the fluid between one end surface of the spool 25 and the damping chamber 22 is trapped and becomes high pressure, so the valve element 55 of the check valve 41 with a throttle is pushed inward and the other end surface 57 is pressed against the other end 48. Have them sit down. As a result, the inside of the valve chamber 43 and the communication path 4B are basically blocked;
The through hole 47 slightly communicates with the communication path 4B through the merging hole 58 and the small diameter throttle path 5S. As a result, the fluid between one end surface of the spool 25 and the movable member 26 is prevented from returning by the valve body 55, and gradually flows from the valve chamber 43 to the throttle passage 5.
9. It flows out into the supply/discharge path 5 through the communication path 48, thereby slowly moving the spool 25 toward the neutral position to prevent hunting. On the other hand, as the spool 25 moves toward one end, the volume of the damping chamber 23 increases and the pressure decreases, so fluid flows into the valve chamber 43 from the communication passage 48 of the check valve 42 with throttle. Therefore, the valve body 55 of the check valve with throttle 42 is pushed and moved toward the outer end, and its one end surface 5B is seated on the one end 4B of the valve chamber 43. As a result, the inside of the valve chamber 43 and the through hole 47 are cut off. however,
As mentioned above, the valve body 55 is mtM in the valve chamber 43, and
Since one end of the fluid passage 80 is open to the outer peripheral surface of the valve body 55, the through hole 47 communicates with the valve chamber 43 through both the throttle passage 59 and the large diameter fluid passage 60. Therefore, the check by the valve body 55 is released, and the fluid in the valve chamber 43 quickly passes through the fluid passage 80 and the through hole 47 to the damping chamber 2.
3 to prevent cavitation in the damping chamber 23. Further, when the crawler vehicle shifts to running downhill or on flat ground, the spool 25 moves in the same way as described above, causing fluid to flow into or out of the damping chambers 22 and 23. The check valves 41, 42 operate similarly to slow the movement of the spool 25 and prevent cavitation in the damping chamber 22, 23.
なお、前述の実施例においては、絞り通路５９、流体通
路６０の他側端を合流穴５８を介して弁体５５ノ一端面
５８に開口させたが、この発明においては、絞り通路、
流体通路を弁体内に個別に形成し、それぞれ独立させて
弁体の一端面に開口させるようにしてもよい。In the above-described embodiment, the other end of the throttle passage 59 and the fluid passage 60 were opened to the one end surface 58 of the valve body 55 through the confluence hole 58, but in this invention, the throttle passage
The fluid passages may be formed individually within the valve body, and each may be opened independently at one end surface of the valve body.
及」ＪＬ在上
以上説明したように、この発明によれば、絞りおよび逆
止を行なうために１個の弁でよいので、構造が簡単とな
り安価に製作できる。As described above, according to the present invention, only one valve is required for throttling and checking, so the structure is simple and can be manufactured at low cost.
第１図はこの発明をクローラ車両の駆動装置に適用した
一実施例を示す一部が回路記号で示された断面図、第２
図は絞り付き逆止弁の拡大断面図、第３図は弁体の第２
図に示す■−■矢視断面図である。
２５・・・ケース
４１．４２・・・絞り付き逆止弁
４３・・・弁室 ４Ｂ・・・弁室の一端４７
．４８・・・流出入通路 ４３・・・弁室の他端５５・
・・弁体 ５６・・・一端面５７・・・他端
面 ５９・・・絞り通路６０・・・流体通路
特許出願人 帝人製機株式会社
代理人 弁理士 多 １）敏 雄
第２図
４３・・弁室
４６・弁室の一端
４７・・流出入通路（貫通孔）
４８・・流出入通路（連通路）
４９・−・弁室の他端
５５・・弁体
５６−・一端面
５７・・・他端ｆ
５９・・絞９通路
６０・・・流体通路Fig. 1 is a cross-sectional view showing an embodiment in which the present invention is applied to a drive device for a crawler vehicle, a part of which is shown with circuit symbols;
The figure is an enlarged cross-sectional view of a check valve with a throttle, and Figure 3 shows the second part of the valve body.
It is a sectional view taken along the line ■-■ shown in the figure. 25... Case 41. 42... Check valve with throttle 43... Valve chamber 4B... One end of valve chamber 47
．． 48... Outflow/inflow passage 43... Other end of valve chamber 55.
... Valve body 56 ... One end surface 57 ... Other end surface 59 ... Throttle passage 60 ... Fluid passage Patent applicant Teijin Seiki Co., Ltd. agent Patent attorney Ta 1) Toshio Figure 2 43. - Valve chamber 46 - One end of the valve chamber 47 - Inflow and outflow passage (through hole) 48 - Inflow and outflow passage (communication passage) 49 - - Other end of the valve chamber 55 - Valve body 56 - - One end surface 57 -・・Other end f 59 ・・Restriction 9 passage 60 ・・Fluid passage
Claims (1)
弁室の長手方向一端および他端にそれぞれ開口した一対
の流出入通路と、弁室内に遊嵌され該弁室の長手方向に
移動可能で、その一端面および他端面が弁室の一端およ
び他端にそれぞれ着座することができる弁体と、該弁体
内に形成され片側端が弁体の他端面に他側端が弁体の一
端面に開口する小径の絞り通路と、前記弁体内に形成さ
れ片側端が弁体の外周面に他側端が弁体の一端面に開口
する大径の流体通路と、を備えたことを特徴とする絞り
付き逆止弁。A case with a valve chamber formed therein, a pair of inflow and outflow passages formed in the case and open at one end and the other end of the valve chamber in the longitudinal direction, and loosely fitted into the valve chamber and movable in the longitudinal direction of the valve chamber. a valve body whose one end surface and the other end surface can be seated on one end and the other end of the valve chamber, respectively; and a valve body formed within the valve body, one end of which is formed on the other end surface of the valve body, and the other end of which is seated on one end of the valve chamber. A small-diameter throttle passage that opens at an end face, and a large-diameter fluid passage that is formed within the valve body and has one end opening on the outer circumferential surface of the valve body and the other end opening on one end face of the valve body. A check valve with a throttle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18104786A JPS6338776A (en) | 1986-07-31 | 1986-07-31 | Check valve formed with orifice |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18104786A JPS6338776A (en) | 1986-07-31 | 1986-07-31 | Check valve formed with orifice |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6338776A true JPS6338776A (en) | 1988-02-19 |
Family
ID=16093841
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18104786A Pending JPS6338776A (en) | 1986-07-31 | 1986-07-31 | Check valve formed with orifice |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6338776A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1004791A1 (en) * | 1998-11-25 | 2000-05-31 | Tok Bearing Co., Ltd. | Rotary damper |
| DE10036939A1 (en) * | 2000-07-28 | 2002-02-21 | Siemens Ag | Flushing valve for fuel pump for common rail diesel engine comprises valve body mounted on spring and first throttle channel in front of it, components being mounted in sleeve with groove on its outside acting as second throttle channel |
| JP2007064372A (en) * | 2005-08-31 | 2007-03-15 | Gunma Koike:Kk | Adiabatic compression-preventing structure and pressure regulator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS446635Y1 (en) * | 1965-10-18 | 1969-03-11 | ||
| JPS504835A (en) * | 1972-07-05 | 1975-01-18 | ||
| JPS5721880B2 (en) * | 1978-11-01 | 1982-05-10 |
-
1986
- 1986-07-31 JP JP18104786A patent/JPS6338776A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS446635Y1 (en) * | 1965-10-18 | 1969-03-11 | ||
| JPS504835A (en) * | 1972-07-05 | 1975-01-18 | ||
| JPS5721880B2 (en) * | 1978-11-01 | 1982-05-10 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1004791A1 (en) * | 1998-11-25 | 2000-05-31 | Tok Bearing Co., Ltd. | Rotary damper |
| DE10036939A1 (en) * | 2000-07-28 | 2002-02-21 | Siemens Ag | Flushing valve for fuel pump for common rail diesel engine comprises valve body mounted on spring and first throttle channel in front of it, components being mounted in sleeve with groove on its outside acting as second throttle channel |
| DE10036939B4 (en) * | 2000-07-28 | 2005-06-09 | Siemens Ag | check valve |
| JP2007064372A (en) * | 2005-08-31 | 2007-03-15 | Gunma Koike:Kk | Adiabatic compression-preventing structure and pressure regulator |
| JP4685556B2 (en) * | 2005-08-31 | 2011-05-18 | 株式会社群馬コイケ | Adiabatic compression prevention structure and pressure regulator |
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