JPH0733845Y2 - Hydraulic filter - Google Patents
Hydraulic filterInfo
- Publication number
- JPH0733845Y2 JPH0733845Y2 JP1214690U JP1214690U JPH0733845Y2 JP H0733845 Y2 JPH0733845 Y2 JP H0733845Y2 JP 1214690 U JP1214690 U JP 1214690U JP 1214690 U JP1214690 U JP 1214690U JP H0733845 Y2 JPH0733845 Y2 JP H0733845Y2
- Authority
- JP
- Japan
- Prior art keywords
- outer cylinder
- filter element
- filter
- screw
- pressure oil
- 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.)
- Expired - Fee Related
Links
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- Details Of Reciprocating Pumps (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、油圧ポンプの吐出側等に位置して取付けら
れ、高圧、高流量の圧油中の異物を除去するのに好適に
用いられる油圧フィルタに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is mounted at the discharge side of a hydraulic pump, etc., and is suitably used for removing foreign matter in high-pressure, high-flow pressure oil. Regarding hydraulic filters.
従来の油圧フィルタとしては、第2図に示すようなもの
がある。A conventional hydraulic filter is shown in FIG.
図中、1はケーシング本体で、該ケーシング本体1は有
底筒体状に形成され、その上端に複数のねじ穴1A,1A,…
が設けられると共に内部がフィルタ収容室1Bとなってい
る。2は圧油の流入口で、該流入口2は油圧ポンプの吐
出側(図示せず)に接続され、該吐出側から吐出された
高圧、高流量の圧油をフィルタ収容室1B内に流入させる
ようになっている。3は圧油の流出口で、該流出口3
は、例えば油圧ショベル等の各アクチュエータまで延設
された供給配管(図示せず)に接続され、フィルタ収容
室1Bを通過した圧油を各アクチュエータへ圧送するよう
になっている。In the figure, reference numeral 1 denotes a casing body, which is formed into a cylindrical body having a bottom and a plurality of screw holes 1A, 1A, ...
Is provided and the inside serves as a filter storage chamber 1B. Reference numeral 2 is an inflow port for pressure oil, which is connected to a discharge side (not shown) of a hydraulic pump, and the high-pressure, high-flow pressure oil discharged from the discharge side flows into the filter housing chamber 1B. It is designed to let you. 3 is an outlet for pressure oil,
Is connected to a supply pipe (not shown) extending to each actuator such as a hydraulic excavator, and the pressure oil that has passed through the filter storage chamber 1B is pressure-fed to each actuator.
4はケーシング本体1を施蓋するカバーで、該カバー4
は、その内側(図中の下側)に後述するフィルタエレメ
ント7の一端(図中の上端)が挿嵌される凹部4Aと、該
凹部4Aと外部とを連通して設けられ、圧力測定等に用い
られる補助ポート4Bと、カバー4の周縁部に複数個設け
られ、該カバー4をケーシング本体1に固定するための
ねじ挿入穴4C,4C…とを有している。Reference numeral 4 denotes a cover that covers the casing body 1.
Is a recess 4A into which one end (upper end in the drawing) of the filter element 7 described later is fitted inside (lower side in the drawing), and the recess 4A is provided so as to communicate with the outside. Has auxiliary ports 4B used for the above, and a plurality of screw insertion holes 4C, 4C ... Which are provided in the peripheral portion of the cover 4 for fixing the cover 4 to the casing body 1.
5,5,…は固定用ボトルで、該各固定用ボトル5は各ねじ
挿入穴4Cに挿入され、ケーシング本体1の各ねじ穴1Aに
螺合させることで、カバー4をケーシング本体1に固定
し、ケーシング6を構成していると共に、フィルタ収容
室1Bと凹部4Aとによって該ケーシング6内にフィルタ室
6Aを構成している。5, 5 ... are fixing bottles, and each fixing bottle 5 is inserted into each screw insertion hole 4C and screwed into each screw hole 1A of the casing body 1 to fix the cover 4 to the casing body 1. The casing 6 is formed, and the filter chamber 1B and the recess 4A form a filter chamber inside the casing 6.
It comprises 6A.
7はフィルタエレメントで、該フィルタエレメント7は
金網によって円筒状に形成され、フィルタ室6A内に装着
されている。8はOリングで、該Oリング8はカバー4
が施蓋された状態で、該カバー4の凹部4Aとフィルタエ
レメント7の上端部との間をシールしている。Reference numeral 7 is a filter element, and the filter element 7 is formed in a cylindrical shape by a wire mesh and is installed in the filter chamber 6A. 8 is an O-ring, and the O-ring 8 is a cover 4
With the lid closed, a seal is formed between the recess 4A of the cover 4 and the upper end of the filter element 7.
9はカバー4の補助ボート4Bに設けられたプラグで、該
プラグ9は圧力測定時等に外される。また、10はケーシ
ング本体1とカバー4との間をシールするOリングを示
す。Reference numeral 9 is a plug provided on the auxiliary boat 4B of the cover 4, and the plug 9 is removed at the time of pressure measurement or the like. Reference numeral 10 denotes an O-ring that seals between the casing body 1 and the cover 4.
以上のように構成された油圧フィルタでは、油圧ポンプ
の作動によって吐出される高圧、高流量の圧油が、流入
口2からフィルタ室6A内に流入し、フィルタエレメント
7を通過するときに圧油内の異物が濾し取られ、流出口
3から流出して外部の各アクチュエータに圧送される。In the hydraulic filter configured as described above, the high-pressure, high-flow pressure oil discharged by the operation of the hydraulic pump flows into the filter chamber 6A from the inflow port 2 and passes through the filter element 7 when the pressure oil flows. The foreign matter inside is filtered out, flows out from the outflow port 3, and is pressure-fed to each external actuator.
ところで、上述した従来技術にあっては、フィルタエレ
メント7は、濾過部材として可撓性のある金網で構成さ
れ、外周側には補強のための手段は講じられていない。
このため、流入口2からフィルタ室6A内に流入する高
圧、高流量の圧油がフィルタエレメント7の外周面に直
接あたる部分では、圧油の流体力によって該フィルタエ
レメント7が変形し、短期間のうちに破損するという問
題点がある。By the way, in the above-mentioned prior art, the filter element 7 is made of a flexible metal mesh as a filtering member, and no reinforcement means is provided on the outer peripheral side.
Therefore, in the portion where the high-pressure, high-flow pressure oil flowing into the filter chamber 6A from the inflow port 2 directly contacts the outer peripheral surface of the filter element 7, the filter element 7 is deformed by the fluid force of the pressure oil, and the short-term There is a problem that it will be damaged soon.
また、流入口2からの圧油は、流入口2に対応する部分
で特に強く流体力が作用するため、不規則な目詰まりを
起し、短期間での定期点検、清掃が必要になるという問
題点がある。Further, the pressure oil from the inflow port 2 exerts a particularly strong fluid force at a portion corresponding to the inflow port 2, causing irregular clogging, and periodical inspection and cleaning in a short period are required. There is a problem.
本考案は上述した従来技術の問題点に鑑みなされたもの
で、圧油の流体力によるフィルタエレメントの変形、破
損および不規則な目詰まりを確実に防止すると共に、外
筒を確実に固定し、かつねじのゆるみを確実に防止しう
るようにした油圧フィルタを提供することを目的とす
る。The present invention has been made in view of the above-mentioned problems of the prior art, and reliably prevents deformation, damage and irregular clogging of the filter element due to the hydraulic force of pressure oil, and securely fixes the outer cylinder, Moreover, it is an object of the present invention to provide a hydraulic filter capable of surely preventing loosening of screws.
上述した課題を解決するために本考案が採用する構成
は、内部にフィルタ室を有し、高流量の圧油を通過させ
るケーシングと、該ケーシングのフィルタ室内に装着さ
れ、該フィルタ室を通過する圧油から異物を濾過するフ
ィルタエレメントと、該フィルタエレメントの外周を囲
繞して設けられ、フィルタ室内に流入する高流量の圧油
を通過させるため周囲に多数の通油孔を有する外筒とか
らなり、前記フィルタエレメントの一端には前記外筒の
一端を支持するフランジ部を設けると共に、その他端に
はねじ穴を設け、前記外筒の他端には該ねじ穴に対応す
る位置にU字状切欠きを設け、前記外筒を前記フランジ
部とU字状切欠きからねじ穴に取付けられるねじとで固
定支持してなる。The structure adopted by the present invention to solve the above-mentioned problems is a casing having a filter chamber inside, and a casing that allows a high flow rate of pressure oil to pass through, and a casing mounted in the filter chamber of the casing and passing through the filter chamber. From a filter element that filters foreign matter from the pressure oil and an outer cylinder that is provided so as to surround the outer periphery of the filter element and that has a large number of oil passage holes in the periphery for passing a high flow rate of pressure oil that flows into the filter chamber. A flange portion for supporting one end of the outer cylinder is provided at one end of the filter element, and a screw hole is provided at the other end, and a U-shape is provided at the other end of the outer cylinder at a position corresponding to the screw hole. -Shaped notches are provided, and the outer cylinder is fixedly supported by the flange portion and the screws attached to the screw holes from the U-shaped notches.
以上の構成により、外筒がフィルタエレメントに挿嵌さ
れ、外筒の一端がエレメントのフランジ部に当接され、
外筒の他端のU字状切欠きとねじ穴とを合致させた状態
でねじを取付けるだけで、外筒をフランジ部とねじとで
フィルタエレメントに固定支持することができ、フィル
タ室に流入する高流量の圧油の流体力は外筒で受承さ
れ、フィルタエレメントへの悪影響を防止する。しか
も、ねじはU字状切欠き内に嵌合されるから、該ねじの
ゆるみ発生を防止しうる。With the above configuration, the outer cylinder is inserted into the filter element, and one end of the outer cylinder is brought into contact with the flange portion of the element,
The outer cylinder can be fixedly supported on the filter element by the flange portion and the screw simply by mounting the screw in a state where the U-shaped notch at the other end of the outer cylinder is aligned with the screw hole, and flows into the filter chamber. The fluid force of the high flow rate pressure oil is received by the outer cylinder and prevents the filter element from being adversely affected. Moreover, since the screw is fitted in the U-shaped notch, it is possible to prevent loosening of the screw.
以下、本考案の実施例を第1図に基づいて説明する。な
お、本実施例の油圧フィルタの全体構成は従来技術とほ
ぼ同様であるため、同一部材には同一符号を付し、その
説明を省略する。An embodiment of the present invention will be described below with reference to FIG. Since the overall configuration of the hydraulic filter of this embodiment is almost the same as that of the conventional art, the same members are designated by the same reference numerals and the description thereof will be omitted.
図中、11は本実施例のフィルタエレメントで、該フィル
タエレメント11は、内周側に成形された筒部12Aおよび
該筒部12Aの外方に延在して一体成形された円盤部12Bか
らなる下側抑え板12と、内周側に成形された筒部13Aお
よび該筒部13Aの外方に延在して肉厚に一体成形された
円盤部13Bからなる上側抑え板13と、これら両側の抑え
板12,13の間にそれぞれの筒部12A,13Aに嵌着して設けら
れ、周面に多数の通油孔14A,14A,…を有する内筒14と、
該内筒14の外周に前記各抑え板12,13との間に位置して
嵌着され、圧油中の異物を濾過する濾過部材15とから構
成されている。そして、下側抑え板12には、その円盤部
12Bの周囲にフランジ部12Cが形成されている。また、上
側抑え板13の円盤部13Bには、その周縁部に4個のねじ
穴13C,13C,…が形成されている。In the figure, 11 is a filter element of the present embodiment, the filter element 11 is a cylindrical portion 12A formed on the inner peripheral side and a disk portion 12B integrally formed by extending outward of the cylindrical portion 12A. A lower restraining plate 12, and an upper restraining plate 13 including a cylindrical portion 13A formed on the inner peripheral side and a disk portion 13B that extends outward of the cylindrical portion 13A and is integrally formed in a thick wall, An inner cylinder 14 which is provided between the restraining plates 12 and 13 on both sides by being fitted into the respective cylinder portions 12A and 13A and which has a large number of oil passage holes 14A, 14A, ...
A filter member 15 is fitted around the inner cylinder 14 so as to be located between the pressing plates 12 and 13 and filters foreign matter in the pressure oil. Then, on the lower holding plate 12, the disc portion
A flange portion 12C is formed around 12B. Further, the disk portion 13B of the upper restraining plate 13 has four screw holes 13C, 13C, ...
16はフィルタエレメント11の外周を囲繞して設けられた
外筒で、該外筒16はフィルタエレメント11の外径より僅
かに大きく成形され、フィルタエレメント11との間に隙
間を有するように設定されている。そして、外筒16の周
囲には、圧油を通過させる多数の通油孔16Aが設けら
れ、上端部には前記上側抑え板13の各ねじ穴13Cに対応
する位置に4個のU字状切欠き16Bが設けられている。16 is an outer cylinder provided around the outer periphery of the filter element 11, and the outer cylinder 16 is formed to be slightly larger than the outer diameter of the filter element 11 and is set so as to have a gap between it and the filter element 11. ing. A large number of oil passage holes 16A for passing pressure oil are provided around the outer cylinder 16, and four U-shaped holes are provided at the upper end at positions corresponding to the screw holes 13C of the upper holding plate 13. A cutout 16B is provided.
17は外筒16の各U字状切欠き16Bと上側抑え板13の各ね
じ穴13Cとを合致させた状態で、該ねじ穴13Cに螺合させ
るねじで、該ねじ17によって外筒16を固定支持するよう
になっている。なお、各ねじ17の頭部には滑り止めとし
てのローレットが設けられている。Reference numeral 17 denotes a screw which is screwed into the screw hole 13C in a state where each U-shaped notch 16B of the outer cylinder 16 and each screw hole 13C of the upper holding plate 13 are matched, and the outer cylinder 16 is screwed by the screw 17. It is designed to be fixedly supported. The head of each screw 17 is provided with a knurl as a slip stopper.
本実施例はこのように構成されるが、フィルタエレメン
ト11に外筒16を取付けるには、図中の一点鎖線で示すよ
うに、外筒16を上側からフィルタエレメント11に挿嵌
し、外筒16の下端部が下側抑え板12のフランジ部12Cに
当接して支持された状態で、外筒16のU字状切欠き16B
と上側抑え板13の各ねじ穴13Cとを合致させ、各ねじ17
を螺合させる。この状態で、外筒16はその下端部がフラ
ンジ部12Cで支持され、上端部がU字状切欠き16Bに嵌合
された各ねじ17で支持されて、フィルタエレメント11に
一体的に固定される。Although the present embodiment is configured in this way, in order to attach the outer cylinder 16 to the filter element 11, the outer cylinder 16 is inserted into the filter element 11 from the upper side as shown by the alternate long and short dash line in the figure, and the outer cylinder is The U-shaped cutout 16B of the outer cylinder 16 with the lower end of 16 abutting against and being supported by the flange 12C of the lower holding plate 12.
The screw holes 13C of the upper holding plate 13 to match each screw 17
Screw together. In this state, the lower end of the outer cylinder 16 is supported by the flange 12C, and the upper end thereof is supported by the screws 17 fitted in the U-shaped notches 16B, and is integrally fixed to the filter element 11. It
このように組立てられたフィルタエレメント組立体は、
従来技術として述べたフィルタエレメント7に代えて、
ケーシング6のフィルタ室6A内に装着される。この状態
で、ケーシング本体1の流入口2からフィルタ収容室1B
に流入した高圧、高流量の圧油は、流入口2の正面に位
置するフィルタエレメント11の部分に直接にその流体力
を作用させようとするが、フィルタエレメント11は外筒
16で囲繞されており、圧油は外筒16にあたってフィルタ
エレメント11に直接作用するのを防止する。The filter element assembly assembled in this way is
Instead of the filter element 7 described as the prior art,
It is mounted in the filter chamber 6A of the casing 6. In this state, from the inflow port 2 of the casing body 1 to the filter storage chamber 1B
The high-pressure, high-flow pressure oil that has flowed into the valve tries to directly exert its fluid force on the portion of the filter element 11 located in front of the inflow port 2, but the filter element 11 is an outer cylinder.
It is surrounded by 16 and prevents the pressure oil from directly acting on the filter element 11 upon reaching the outer cylinder 16.
この結果、フィルタエレメント11が変形、破損するのを
確実に防止することができ、フィルタエレメント11の寿
命を大幅に向上させることができる。As a result, it is possible to reliably prevent the filter element 11 from being deformed or damaged, and it is possible to significantly improve the life of the filter element 11.
また、外筒16はフィルタエレメント11に対して下側抑え
板12のフランジ部12Cとねじ17だけで支持されているた
め、外筒16は容易に取り外すことができ、点検、清掃が
容易になる。Further, since the outer cylinder 16 is supported with respect to the filter element 11 only by the flange portion 12C of the lower holding plate 12 and the screw 17, the outer cylinder 16 can be easily removed, and inspection and cleaning are facilitated. .
さらに、ねじ17はU字状切欠き16Bに嵌合され、次い
で、該ねじ17は上側抑え板13の各ねじ穴13Cに螺合され
た状態で外筒16を固定支持する構成としたので、上側抑
え板13と外筒16との間に隙間があっても外筒16を確実に
固定支持することができ、その上、ねじ17のゆるみも確
実に防止することができる。Further, the screw 17 is fitted into the U-shaped cutout 16B, and then the screw 17 is fixedly supported to the outer cylinder 16 while being screwed into each screw hole 13C of the upper holding plate 13. Even if there is a gap between the upper restraint plate 13 and the outer cylinder 16, the outer cylinder 16 can be securely fixed and supported, and further, the screw 17 can be securely prevented from being loosened.
然るに、本実施例のように外筒16にU字状切欠き16Bを
設けず、外筒16にねじ穴を穿設し、当該外筒16を上側抑
え板13の各ねじ穴13Cに螺合させた場合には、外筒16と
上側抑え板13との公差上の隙間が必然的に生じるから、
外筒16を十分に固定することができず、また、ねじのゆ
るみ発生の原因となる。However, unlike the present embodiment, the outer cylinder 16 is not provided with the U-shaped notch 16B, but a screw hole is formed in the outer cylinder 16, and the outer cylinder 16 is screwed into each screw hole 13C of the upper holding plate 13. If this is done, a gap due to the tolerance between the outer cylinder 16 and the upper holding plate 13 will inevitably occur,
The outer cylinder 16 cannot be fixed sufficiently and also causes loosening of screws.
なお、本実施例では、外筒16をフィルタエレメント11に
固定支持するためのねじ穴13C、ねじ17およびU字状切
欠き16Bをそれぞれ4個づつ設けたが、これらは、外筒1
6をフィルタエレメント11に確実に固定支持できればよ
いため、フィルタエレメント11および外筒16の大きさ等
を考慮して2個、3個または5個以上であってもよい。In this embodiment, four screw holes 13C, four screws 17 and four U-shaped notches 16B for fixing and supporting the outer cylinder 16 to the filter element 11 are provided.
It suffices that 6 can be securely fixedly supported on the filter element 11, so that the number may be two, three, or five or more in consideration of the sizes of the filter element 11 and the outer cylinder 16.
以上詳述した通り、本考案によれば、フィルタエレメン
トの外周を囲繞して外筒を設け、フィルタエレメントの
一端には外筒の一端を支持するフランジ部を設けると共
に他端にはねじ穴を設け、さらに、外筒他端のねじ穴に
対応する位置にU字状切欠きを設けて前記外筒を前記フ
ランジ部とねじ穴に取付けられたねじとで支持するた
め、ケーシングのフィルタ室に流入する高圧、高流量の
圧油は外筒にあたってフィルタエレメントに直接作用す
るのを防止され、フィルタエレメントが変形、破損する
のを確実に防止することができる。この結果、フィルタ
エレメントの寿命を大幅に向上させることができ、フィ
ルタエレメントに対する信頼性が向上する。As described in detail above, according to the present invention, an outer cylinder is provided so as to surround the outer periphery of the filter element, a flange portion for supporting one end of the outer cylinder is provided at one end of the filter element, and a screw hole is provided at the other end. Further, a U-shaped notch is provided at a position corresponding to the screw hole at the other end of the outer cylinder to support the outer cylinder with the flange portion and the screw attached to the screw hole, so that the filter chamber of the casing is provided. The inflowing high-pressure and high-flow pressure oil is prevented from directly acting on the filter element by hitting the outer cylinder, and it is possible to reliably prevent the filter element from being deformed or damaged. As a result, the service life of the filter element can be significantly extended, and the reliability of the filter element is improved.
また、外筒はねじを外すだけで容易に取り外すことがで
きるため、フィルタエレメントの点検、清掃が容易にな
る。Further, since the outer cylinder can be easily removed only by removing the screw, the filter element can be easily inspected and cleaned.
さらに、外筒はU字状切欠きに嵌合した状態でフィルタ
エレメントのねじ穴に取付けられたねじで支持するた
め、該ねじ穴の部分でフィルタエレメントと外筒との間
に隙間があっても外筒を確実に固定支持することがで
き、その上、ねじのゆるみも確実に防止することができ
る。Further, since the outer cylinder is supported by the screw attached to the screw hole of the filter element while being fitted in the U-shaped notch, there is a gap between the filter element and the outer cylinder at the screw hole portion. Also, the outer cylinder can be securely fixed and supported, and further, the loosening of the screw can be surely prevented.
第1図は本考案のフィルタエレメントおよび外筒を示す
一部破断側面図、第2図は従来技術の油圧フィルタを示
す一部破断側面図である。 1……ケーシング本体、2……流入口、3……流出口、
4……カバー、6……ケーシング、6A……フィルタ室、
11……フィルタエレメント、12……下側抑え板、12C…
…フランジ部、13……上側抑え板、13C……ねじ穴、16
……外筒、16A……通油孔、16B……U字状切欠き、17…
…ねじ。FIG. 1 is a partially cutaway side view showing a filter element and an outer cylinder of the present invention, and FIG. 2 is a partially cutaway side view showing a conventional hydraulic filter. 1 ... Casing body, 2 ... Inlet, 3 ... Outlet,
4 ... Cover, 6 ... Casing, 6A ... Filter chamber,
11 …… Filter element, 12 …… Lower restraint plate, 12C…
… Flange part, 13 …… Upper retaining plate, 13C …… Screw hole, 16
…… Outer cylinder, 16A …… Oil passage hole, 16B …… U-shaped notch, 17…
…screw.
Claims (1)
通過させるケーシングと、該ケーシングのフィルタ室内
に装着され、該フィルタ室を通過する圧油から異物を濾
過するフィルタエレメントと、該フィルタエレメントの
外周を囲繞して設けられ、フィルタ室内に流入する高流
量の圧油を通過させるため周囲に多数の通油孔を有する
外筒とからなり、前記フィルタエレメントの一端には前
記外筒の一端を支持するフランジ部を設けると共に、そ
の他端にはねじ穴を設け、前記外筒の他端には該ねじ穴
に対応する位置にU字状切欠きを設け、前記外筒を前記
フランジ部とU字状切欠きからねじ穴に取付けられるね
じとで固定支持してなる油圧フィルタ。1. A casing having a filter chamber therein, which allows a high flow rate of pressure oil to pass therethrough, and a filter element mounted in the filter chamber of the casing for filtering foreign matter from the pressure oil passing through the filter chamber. An outer cylinder is provided surrounding the outer periphery of the filter element, and has an outer cylinder having a large number of oil passage holes around it for passing a high flow rate of pressure oil flowing into the filter chamber. A flange portion for supporting one end of the cylinder is provided, a screw hole is provided at the other end, and a U-shaped notch is provided at a position corresponding to the screw hole at the other end of the outer cylinder, and the outer cylinder is A hydraulic filter that is fixed and supported by a flange and a screw that is attached to a screw hole from a U-shaped notch.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1214690U JPH0733845Y2 (en) | 1990-02-09 | 1990-02-09 | Hydraulic filter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1214690U JPH0733845Y2 (en) | 1990-02-09 | 1990-02-09 | Hydraulic filter |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03102206U JPH03102206U (en) | 1991-10-24 |
JPH0733845Y2 true JPH0733845Y2 (en) | 1995-08-02 |
Family
ID=31515636
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1214690U Expired - Fee Related JPH0733845Y2 (en) | 1990-02-09 | 1990-02-09 | Hydraulic filter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0733845Y2 (en) |
-
1990
- 1990-02-09 JP JP1214690U patent/JPH0733845Y2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH03102206U (en) | 1991-10-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |