JPH0822356B2 - Anti-vibration device for washing machine - Google Patents
Anti-vibration device for washing machineInfo
- Publication number
- JPH0822356B2 JPH0822356B2 JP63244873A JP24487388A JPH0822356B2 JP H0822356 B2 JPH0822356 B2 JP H0822356B2 JP 63244873 A JP63244873 A JP 63244873A JP 24487388 A JP24487388 A JP 24487388A JP H0822356 B2 JPH0822356 B2 JP H0822356B2
- Authority
- JP
- Japan
- Prior art keywords
- sliding body
- seal member
- peripheral surface
- sliding
- vibration
- 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 - Lifetime
Links
Landscapes
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は、吊り棒に揺動可能に支持された槽体の振動
を防止する洗濯機の防振装置に関する。Description: [Object of the Invention] (Field of Industrial Application) The present invention relates to a vibration isolator for a washing machine that prevents vibration of a tub body swingably supported by a hanging rod.
（従来の技術） この種洗濯機の防振装置の一例として、第３図に示す
ものが供されている。この第３図において、１は上部閉
塞体２及び弾力を有するゴム製の緩衝管３よりなる摺動
体で、これは吊り棒４に上下動可能に貫挿され、図示し
ない槽体の支持片部５を支持している。６は吊り棒４の
下端部に設けられたばね受けで、このばね受け６と摺動
体１の上部閉塞体２との間に圧縮コイルばね７を介装し
ている。これにより、脱水時等の槽体の振動を圧縮コイ
ルばね７によって緩衝すると共に、その振動を、摺動体
１が上下動するときにばね受け６の外周部に形成された
円筒部6aと緩衝管３との摺動抵抗により減衰するように
している。ところが、このものでは、緩衝管３がゴム製
であるため、その内径寸法の精度が出し難く、ばね受け
６の円筒部6aとの締め代がばらつきやすくなり、摺動抵
抗が安定しなくなるから、防振性能が不安定になるとい
う欠点があった。また、ゴムは温度により硬度が変化す
るため、夏は軟かくなって摺動抵抗が小さく、冬は硬く
なって摺動抵抗が大きくなるので、季節により防振性能
が不安定であった。更に、ゴム製の緩衝管３が摩耗し易
いため、防振性能が劣化するという問題点があった。(Prior Art) As an example of a vibration isolator for this type of washing machine, the one shown in FIG. 3 is provided. In FIG. 3, reference numeral 1 designates a sliding body composed of an upper closing body 2 and a rubber shock-absorbing tube 3 having elasticity, which is vertically movably inserted into a suspension rod 4 to support a supporting piece portion of a tank body (not shown). Supports 5. Reference numeral 6 denotes a spring bearing provided at the lower end of the suspension rod 4, and a compression coil spring 7 is interposed between the spring bearing 6 and the upper closing body 2 of the sliding body 1. Thereby, the vibration of the tank body at the time of dehydration and the like is buffered by the compression coil spring 7, and the vibration is also absorbed by the cylindrical portion 6a formed on the outer peripheral portion of the spring receiver 6 and the buffer pipe when the sliding body 1 moves up and down. It is designed to be damped by the sliding resistance with 3. However, in this structure, since the buffer tube 3 is made of rubber, it is difficult to obtain the accuracy of the inner diameter dimension, the tightening margin of the spring bearing 6 with the cylindrical portion 6a easily varies, and the sliding resistance becomes unstable. There is a drawback that the vibration isolation performance becomes unstable. Further, since the hardness of rubber changes depending on the temperature, it becomes soft in the summer and has a small sliding resistance, and hard in the winter to have a large sliding resistance, so that the vibration isolation performance is unstable depending on the season. Further, since the rubber buffer tube 3 is easily worn, there is a problem that the vibration damping performance is deteriorated.
このような問題点を解消するものとして、第４図に示
すものが供されている。この第４図において、８は合成
樹脂製の摺動体、９は吊り棒４の下端部に設けられたゴ
ムパッキングであり、これらにより空気室10を形成して
いる。そして、ゴムパッキング９の外周部に形成したリ
ップ9aを摺動体８の円筒部8aの内周面に接するように設
けていると共に、ゴムパッキング９の上にオイルを含浸
させたフェルト11を設けている。このものの場合、槽体
の振動を上記空気室10の空気ダンパー作用によって減衰
させており、第３図に示すものとは異なり、季節によっ
て防振性能が変化することがない。As a means for solving such a problem, the one shown in FIG. 4 is provided. In FIG. 4, 8 is a sliding member made of synthetic resin, 9 is a rubber packing provided at the lower end of the hanging rod 4, and these form an air chamber 10. The lip 9a formed on the outer peripheral portion of the rubber packing 9 is provided so as to contact the inner peripheral surface of the cylindrical portion 8a of the sliding body 8, and the felt 11 impregnated with oil is provided on the rubber packing 9. There is. In this case, the vibration of the tank body is damped by the air damper action of the air chamber 10, and unlike the one shown in FIG. 3, the vibration isolation performance does not change depending on the season.
（発明が解決しようとする課題） しかしながら、上記従来構成では、摺動体８が上下動
するときフェルト11に含浸させたオイルが摺動体８の上
部の内周面にまで飛散したり、或は該オイルがリップ9a
と摺動体８の内周面との間を通って下側に流出したりす
ることから、長期間使用した場合、オイル切れが発生
し、その結果、ゴムパッキング９が摩耗して防振性能が
劣化するという問題点があった。(Problems to be Solved by the Invention) However, in the above conventional configuration, when the sliding body 8 moves up and down, the oil impregnated in the felt 11 is scattered to the inner peripheral surface of the upper portion of the sliding body 8, or Oil lip 9a
The oil flows out between the inner surface of the sliding member 8 and the inner surface of the sliding member 8, so that when it is used for a long period of time, oil runs out, and as a result, the rubber packing 9 is worn and vibration damping performance is deteriorated. There was a problem of deterioration.
そこで、本発明の目的は、季節によって防振性能が変
化することを防止できると共に、防振性能を長期間にわ
たり良好に保持でき、そして、簡単な構成にて実現でき
る洗濯機の防振装置を提供するにある。Therefore, an object of the present invention is to provide a vibration isolating device for a washing machine, which can prevent the vibration isolating performance from changing depending on the season, can maintain good vibration isolating performance for a long time, and can be realized with a simple configuration. To provide.
［発明の構成］ （課題を解決するための手段） 本発明の洗濯機の防振装置は、上部を閉塞した筒状を
なし該上部壁を通して吊り棒に貫挿されて槽体を支持す
る摺動体を備えると共に、前記吊り棒にあって前記摺動
体の下面開口を閉塞し得る位置に設けられその閉塞状態
で空気室を形成する受具を備え、この受具と前記摺動体
の上部壁との間に介装される圧縮コイルばねを備え、そ
して、前記受具に前記摺動体の内周面と接するように設
けられ超高分子ポリエチレン等の耐摩耗性を有する材料
から形成されたシール部材を備え、並びに前記受具の外
周部に設けられた受段部と、この受段部に載置され前記
シール部材を前記摺動体の内周面へ押圧する弾性体を備
えたところに特徴を有する。[Structure of the Invention] (Means for Solving the Problems) A vibration isolator for a washing machine according to the present invention has a tubular shape with an upper part closed, and is inserted into a suspension rod through the upper wall to support a tub body. A moving body is provided, and a receiver is provided at a position in the suspension rod where the lower surface opening of the sliding body can be closed, and a receiver that forms an air chamber in the closed state is provided. A seal member provided with a compression coil spring interposed between the support member and the support member so as to be in contact with the inner peripheral surface of the sliding member and formed of a material having wear resistance such as ultra-high molecular weight polyethylene. And a stepped portion provided on an outer peripheral portion of the receiving member, and an elastic body mounted on the stepped portion and pressing the seal member to an inner peripheral surface of the sliding body. Have.
（作用） 上記手段によれば、摺動体及び受具により形成された
空気室の空気ダンパー作用によって、摺動体ひいては槽
体の振動が減衰される。従って、季節によって防振性能
が変化することがない。そして、シール部材を超高分子
ポリエチレン等の耐摩耗性を有する材料で形成したか
ら、該シール部材の耐摩耗性を向上し得て長期間防振性
能を良好に保持できる。また、受具，シール部材及び弾
性体を別体として備えると共に、受具の外周部に設けら
れた受段部に弾性体を載置し、この弾性体によりシール
部材を摺動体の内周面に押圧させるだけであるので、各
部品の製造及びそれらの組立が容易となり、簡単な構成
によって実現できる。(Operation) According to the above means, the vibration of the sliding body and thus the tank body is damped by the air damper function of the air chamber formed by the sliding body and the receiving member. Therefore, the vibration isolation performance does not change depending on the season. Further, since the seal member is formed of a material having wear resistance such as ultra-high molecular weight polyethylene, the wear resistance of the seal member can be improved and good vibration damping performance can be maintained for a long time. Further, the receiver, the seal member and the elastic body are separately provided, and the elastic body is placed on the stepped portion provided on the outer peripheral portion of the receiver, and the elastic member serves to seal the seal member on the inner peripheral surface of the sliding body. Since it is simply pressed, the manufacturing of each part and the assembling thereof can be facilitated, and it can be realized by a simple configuration.
（実施例） 以下、本発明の一実施例につき第１図及び第２図を参
照しながら説明する。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
まず第２図において、21は脱水兼用洗濯機の外箱、22
はこの外箱21内に設けられた槽体である例えば水受槽22
であり、この水受槽22内に回転槽23が回転可能に支承さ
れている。回転槽23の内部には、上半部に筒状体24が固
着され、下半部に容器状をなす攪拌体25が配設されてい
る。そして、この攪拌体25及び前記回転槽23は、水受槽
22の外底部に取付けられた駆動モータ26によりクラッチ
機構及び減速機構等よりなる回転伝達機構27を介してそ
れぞれ適宜駆動されるようになっている。First, in FIG. 2, 21 is an outer box of the washing machine for combined use of dehydration,
Is a tank provided in the outer box 21, for example, a water receiving tank 22
A rotary tank 23 is rotatably supported in the water receiving tank 22. Inside the rotary tank 23, a cylindrical body 24 is fixed to the upper half portion, and a container-shaped stirring body 25 is arranged in the lower half portion. The stirring body 25 and the rotary tank 23 are water receiving tanks.
A drive motor 26 attached to the outer bottom of 22 is appropriately driven via a rotation transmission mechanism 27 including a clutch mechanism and a reduction mechanism.
さて、28は外箱21内に例えば４本設けられた吊り棒
で、これらは外箱21の四隅にそれぞれ揺動自在に吊持さ
れている。29は水受槽22の下部外周部に吊り棒28に対応
して突設された支持片部で、これは、第１図に示すよう
に、その下面にほゞ球面状の受面29aが形成されてお
り、この受面29aに形成した透孔29bを吊り棒28の下方部
が挿通して下方へ突出している。ここで、30は吊り棒28
の下方部に位置して設けられた防振装置で、以下これに
ついて詳述する。By the way, 28 is, for example, four hanging rods provided in the outer case 21, and these are suspended in four corners of the outer case 21 so as to be swingable. Reference numeral 29 denotes a supporting piece portion projectingly provided on the lower outer peripheral portion of the water receiving tank 22 so as to correspond to the suspension rod 28. As shown in FIG. 1, this has a substantially spherical receiving surface 29a formed on the lower surface thereof. The lower portion of the suspension rod 28 is inserted through the through hole 29b formed in the receiving surface 29a and projects downward. Where 30 is the hanging rod 28
The anti-vibration device provided at the lower part of the above will be described in detail below.
第１図において、31は上部を閉塞した筒状をなす摺動
体で、これは、その上部壁31aの上面をほゞ球面状に形
成しており、この上部壁31aに形成された透孔31bを吊り
棒28が挿通し、以て吊り棒28に上下動可能に貫挿されて
いる。そして、上記上部壁31aに前記支持片部29を載置
させることにより、摺動体31に前記水受槽22が支持され
ている。32は受具で、これは吊り棒28の下端部に抜け止
め状に設けられており、摺動体31の下面開口を閉塞し得
るように位置している。この受具32及び摺動体31により
空気室33が形成されている。また、上記受具32には、同
心状に凸部32a,ばね受段部32b及び受段部32cが形成され
ている。34は圧縮コイルばねで、これは受具32と摺動体
31の上部壁31aとの間に吊り棒28が挿通した状態で介装
されており、上記空気室33内に収容されている。35は超
高分子ポリエチレン等の耐摩耗性を有する材料から形成
され環状をなすシール部材で、これは受具32の凸部32a
に挿通されてばね受段部32bに載置され、且つ外周部35a
が摺動体31の内周面と接触するように設けられている。
ここで、シール部材35の外径寸法は、摺動体31の内径寸
法よりも大きく設定されており、該シール部材35は充分
な締め代を有している。36は弾性体である例えばＯリン
グで、これは受具32の外周部の受段部32cに配置され、
上記シール部材35を摺動体31の内周面に押圧するように
なっている。尚、37はシール部材35と圧縮コイルばね34
との間に介装されたばね受部材である。In FIG. 1, reference numeral 31 denotes a cylindrical sliding body having a closed upper part, which has a substantially spherical upper surface of an upper wall 31a, and a through hole 31b formed in the upper wall 31a. The suspension rod 28 is inserted through the suspension rod 28 and is vertically movably inserted into the suspension rod 28. Then, the water receiving tank 22 is supported by the sliding body 31 by placing the supporting piece portion 29 on the upper wall 31a. Reference numeral 32 denotes a receiving member, which is provided at the lower end portion of the suspension rod 28 in a retaining shape and is positioned so as to close the lower surface opening of the sliding body 31. An air chamber 33 is formed by the receiver 32 and the sliding body 31. Further, the receiving member 32 is provided with a convex portion 32a, a spring receiving portion 32b, and a receiving portion 32c which are concentrically formed. 34 is a compression coil spring, which is a holder 32 and a sliding body.
The suspension rod 28 is interposed between the upper wall 31a of the unit 31 and the upper wall 31a, and is housed in the air chamber 33. Reference numeral 35 denotes an annular seal member formed of a material having wear resistance such as ultra-high molecular weight polyethylene, which is a convex portion 32a of the receiving member 32.
Is placed on the spring stepped portion 32b and is attached to the outer peripheral portion 35a.
Are provided so as to contact the inner peripheral surface of the sliding body 31.
Here, the outer diameter dimension of the seal member 35 is set larger than the inner diameter dimension of the sliding body 31, and the seal member 35 has a sufficient tightening margin. Reference numeral 36 is an elastic body such as an O-ring, which is arranged on the stepped portion 32c on the outer peripheral portion of the receiving member 32,
The seal member 35 is pressed against the inner peripheral surface of the sliding body 31. Incidentally, 37 is a seal member 35 and a compression coil spring 34.
It is a spring receiving member interposed between and.
次に、上記構成の作用を説明する。脱水運転時等に水
受槽22に大きな振動が発生すると、該振動に伴って摺動
体31が吊り棒28に対して上下方向に移動する。このと
き、摺動体31及び水受槽22の振動が圧縮コイルばね34に
よって緩衝されると共に、上記振動が摺動体31及び受具
32により形成された空気室33の空気ダンパー作用によっ
て減衰される。従って、季節によって防振性能が変化す
ることがない。また、シール部材35を超高分子ポリエチ
レン等の耐摩耗性を有する材料で形成したから、該シー
ル部材35の耐摩耗性を向上し得、長期間にわたり防振性
能を良好に保持でき、信頼性が高くなる。更に、受具3
2,シール部材35及びＯリング36を別体として備えると共
に、受具32の外周部の受段部32cに配置したＯリング36
によってシール部材35を摺動体31の内周面に押圧させる
だけの構成であるので、各部品の製造及びそれらの組立
が容易となり、簡単な構成によって実現できる。Next, the operation of the above configuration will be described. When a large vibration occurs in the water receiving tank 22 during the dehydration operation or the like, the sliding body 31 moves vertically with respect to the suspension rod 28 with the vibration. At this time, the vibrations of the sliding body 31 and the water receiving tank 22 are buffered by the compression coil spring 34, and the vibrations are transmitted to the sliding body 31 and the receiving tool.
The air chamber 33 formed by 32 is damped by the air damper action. Therefore, the vibration isolation performance does not change depending on the season. Further, since the seal member 35 is formed of a material having wear resistance such as ultra-high molecular weight polyethylene, the wear resistance of the seal member 35 can be improved, and good vibration isolation performance can be maintained over a long period of time. Becomes higher. Furthermore, the receiver 3
2, the O-ring 36, which is provided with the seal member 35 and the O-ring 36 as a separate body, and is arranged on the step-receiving portion 32c on the outer peripheral portion of the receiving tool 32.
Since the seal member 35 is simply pressed against the inner peripheral surface of the sliding body 31, the manufacturing and assembling of the respective parts are facilitated, and the structure can be realized with a simple structure.
尚、上記実施例では、シール部材35は、その外径寸法
を摺動体31の内径寸法よりも大きく設定し充分な締め代
を有しているため、摺動体31の上下動の繰返しによって
変形し易くなっているが、Ｏリング36により該シール部
材35を摺動体31の内周面に押圧するようにしたので、シ
ール部材35と摺動体31の内周面との間の気密性が向上
し、防振性能を安定化できる。特に、例えば抜きテーパ
により摺動体31の内径が変化する場合においても、Ｏリ
ング36によりシール部材35を摺動体31の内周面に押圧す
るようにしたので、上記内径の変化にかかわらずシール
部材35と摺動体31の内周面との間の気密性を保持でき、
防振性能を安定化できる。In the above embodiment, the seal member 35 has its outer diameter dimension set to be larger than the inner diameter dimension of the sliding body 31 and has a sufficient tightening margin, so that it is deformed by repeated vertical movements of the sliding body 31. Although it is easy, since the O-ring 36 presses the seal member 35 against the inner peripheral surface of the sliding body 31, the airtightness between the seal member 35 and the inner peripheral surface of the sliding body 31 is improved. , Can stabilize the anti-vibration performance. In particular, even when the inner diameter of the sliding body 31 changes due to the draft taper, the seal member 35 is pressed against the inner peripheral surface of the sliding body 31 even when the inner diameter of the sliding body 31 changes. Airtightness between 35 and the inner peripheral surface of the sliding body 31 can be maintained,
Anti-vibration performance can be stabilized.
［発明の効果］ 本発明は以上の説明から明らかなように、上部を閉塞
した筒状をなし該上部壁を通して吊り棒に貫挿されて槽
体を支持する摺動体を備えると共に、前記吊り棒にあっ
て前記摺動体の下面開口を閉塞し得る位置に設けられそ
の閉塞状態で空気室を形成する受具を備え、この受具と
前記摺動体の上部壁との間に介装される圧縮コイルばね
を備え、そして、前記受具に前記摺動体の内周面と接す
るように設けられ超高分子ポリエチレン等の耐摩耗性を
有する材料から形成されたシール部材を備え、並びに前
記受具の外周部に設けられた受段部に載置され前記シー
ル部材を前記摺動体の内周面へ押圧する弾性体を備える
構成としたので、季節によって防振性能が変化すること
を防止できると共に、防振性能を長期間にわたり良好に
保持でき、そして、簡単な構成にて実現できるという優
れた効果を奏する。[Effects of the Invention] As is apparent from the above description, the present invention is provided with a sliding body that has a tubular shape with an upper part closed and is inserted into a suspension rod through the upper wall to support a tank body. And a receiving member which is provided at a position capable of closing the lower surface opening of the sliding body and forms an air chamber in the closed state, and which is interposed between the receiving member and the upper wall of the sliding body. A coil spring, and a seal member formed of a wear-resistant material such as ultra-high molecular weight polyethylene, which is provided on the receiver so as to contact the inner peripheral surface of the sliding body, and Since the elastic member placed on the stepped portion provided on the outer peripheral portion and pressing the seal member against the inner peripheral surface of the sliding member is provided, it is possible to prevent the vibration damping performance from changing depending on the season, Good anti-vibration performance for a long time It has an excellent effect that it can be realized with a simple configuration.
第１図及び第２図は本発明の一実施例を示すもので、第
１図は防振装置の縦断面図、第２図は全体の縦断面図で
ある。また、第３図及び第４図は異なる従来構成を示す
それぞれ第１図相当図である。 図面中、22は水受槽（槽体）、28は吊り棒、30は防振装
置、31は摺動体、32は受具、32cは受段部、33は空気
室、34は圧縮コイルばね、35はシール部材、36はＯリン
グ（弾性体）を示す。1 and 2 show an embodiment of the present invention. FIG. 1 is a vertical sectional view of a vibration isolator, and FIG. 2 is an overall vertical sectional view. Further, FIGS. 3 and 4 are views corresponding to FIG. 1 showing different conventional configurations. In the drawing, 22 is a water receiving tank (tank body), 28 is a suspension rod, 30 is a vibration isolator, 31 is a sliding body, 32 is a receiving member, 32c is a receiving portion, 33 is an air chamber, 34 is a compression coil spring, Reference numeral 35 is a seal member, and 36 is an O-ring (elastic body).
Claims (1)
て吊り棒に貫挿されて槽体を支持する摺動体と、前記吊
り棒にあって前記摺動体の下面開口を閉塞し得る位置に
設けられその閉塞状態で空気室を形成する受具と、この
受具と前記摺動体の上部壁との間に介装される圧縮コイ
ルばねと、前記受具に前記摺動体の内周面と接するよう
に設けられ超高分子ポリエチレン等の耐摩耗性を有する
材料から形成されたシール部材と、前記受具の外周面に
設けられた受段部と、この受段部に載置され前記シール
部材を前記摺動体の内周面へ押圧する弾性体とを具備し
てなる洗濯機の防振装置。1. A sliding body which has a cylindrical shape with an upper part closed and is inserted into a hanging rod through the upper wall to support a tank body, and a position in the hanging bar which can close a lower surface opening of the sliding body. And a compression coil spring interposed between the receiver and the upper wall of the sliding body, and an inner peripheral surface of the sliding body in the receiving body. A seal member formed of a material having wear resistance such as ultra-high molecular weight polyethylene, which is provided so as to come into contact with the receiving member, a step portion provided on the outer peripheral surface of the receiver, and the step member placed on the step portion. An anti-vibration device for a washing machine, comprising: an elastic body that presses a seal member against the inner peripheral surface of the sliding body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63244873A JPH0822356B2 (en) | 1988-09-28 | 1988-09-28 | Anti-vibration device for washing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63244873A JPH0822356B2 (en) | 1988-09-28 | 1988-09-28 | Anti-vibration device for washing machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0292396A JPH0292396A (en) | 1990-04-03 |
| JPH0822356B2 true JPH0822356B2 (en) | 1996-03-06 |
Family
ID=17125271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63244873A Expired - Lifetime JPH0822356B2 (en) | 1988-09-28 | 1988-09-28 | Anti-vibration device for washing machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0822356B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5117659A (en) * | 1990-12-28 | 1992-06-02 | Whirlpool Corporation | Automatic washer suspension system |
| US6009730A (en) * | 1997-05-20 | 2000-01-04 | L G Electronics, Inc. | Damper assembly in washing machine |
| US5946946A (en) * | 1997-11-04 | 1999-09-07 | Whirlpool Corporation | Suspension system for an automatic washing machine |
| US9340916B2 (en) * | 2010-04-13 | 2016-05-17 | Whirlpool Corporation | Laundry treating appliance suspension system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58141185A (en) * | 1982-02-18 | 1983-08-22 | 松下電器産業株式会社 | Vibration-proof device for washing machine |
-
1988
- 1988-09-28 JP JP63244873A patent/JPH0822356B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0292396A (en) | 1990-04-03 |
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