JPH0382665A - Air spring control method for railroad vehicle - Google Patents
Air spring control method for railroad vehicleInfo
- Publication number
- JPH0382665A JPH0382665A JP21823489A JP21823489A JPH0382665A JP H0382665 A JPH0382665 A JP H0382665A JP 21823489 A JP21823489 A JP 21823489A JP 21823489 A JP21823489 A JP 21823489A JP H0382665 A JPH0382665 A JP H0382665A
- Authority
- JP
- Japan
- Prior art keywords
- air
- air spring
- height
- bogie
- exhaust
- 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
- 238000000034 method Methods 0.000 title claims description 6
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 230000007423 decrease Effects 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Landscapes
- Vehicle Body Suspensions (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、空気ばね付きボギー台車を有する鉄道車両
の緩和曲線上における空気ばねの制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of controlling air springs on a transition curve of a railway vehicle having a bogie bogie with air springs.
従来の技術
空気ばね付きボギー台車を有する鉄道車両は、１車両に
４個の空気ばねを配設した４点支持方式が多く採用され
、空気ばねは個々に高さを自動調整するように構成され
ている。すなわち、その時々の荷重に対応して空気ばね
の圧縮空気量を自動的に１ｉｌｌｌＩして、車体の高さ
を一定に保つｌめリンクとレベリングバルブを組合せた
自動高さ調整機構を備えている。Conventional technology Railway vehicles with bogie bogies equipped with air springs often adopt a four-point support system in which four air springs are arranged in one vehicle, and the air springs are configured to automatically adjust their heights individually. ing. In other words, it is equipped with an automatic height adjustment mechanism that combines a limp link and a leveling valve to automatically adjust the amount of compressed air in the air spring to keep the height of the vehicle constant according to the load at the time. .
また、左右の空気ぼね空気圧が大幅に差異を生じた際に
、左右の空気ばね空気圧を均等に保つため左右の補助空
気室間に差圧調整弁が取付けられている。In addition, a differential pressure regulating valve is installed between the left and right auxiliary air chambers in order to keep the left and right air spring air pressures equal when there is a large difference in air pressure between the left and right air springs.
鉄道車両が平坦路線にあって、前後台車が同一平面内に
ある場合は、個々の空気ばね空気圧が自動高さ１Ｉｌｌ
整機構の働きにより自動調整され、車体の高さは一定に
保たれる。そして、高さが一定に保たれている間は、自
動高さ調整機構のレベリングバルブの給排気は停止して
いる。If the railway vehicle is on a flat track and the front and rear bogies are on the same plane, the air pressure of each air spring will automatically increase to 1Ill.
The adjustment mechanism automatically adjusts the height of the vehicle to maintain a constant height. While the height is kept constant, the leveling valve of the automatic height adjustment mechanism stops supplying and exhausting.
しかし、第４図に示すように、鉄道車両が曲線路の緩和
曲線、すなわちカント逓減区間に入った場合は、車体（
１）の４つの空気ばね（１３） （１４） （１６）（
１７）の高さは台車と車体との関係から幾何学的に決ま
るので、軌道のねじれに応じて前台車（１１）の空気ば
ねは、外軌側（１３）が圧縮し内軟側（１４）が伸張す
る。However, as shown in Figure 4, when a railway vehicle enters a transition curve of a curved road, that is, a cant decreasing section,
1) four air springs (13) (14) (16) (
17) is geometrically determined by the relationship between the bogie and the car body, the air spring of the front bogie (11) is compressed on the outer track side (13) and compressed on the inner soft side (14) depending on the twist of the track. ) expands.
また後台車（１２）の空気ばねは、内軟側（１６〉が圧
縮し外軌側（１７）が伸張する。そして、空気ばねの高
さはいずれも制御目標値からはずれているため、自動高
さ調整機構のレベリングバルブの給排気は連続して行な
われる。In addition, the air spring of the rear bogie (12) is compressed on the inner soft side (16〉) and expanded on the outer track side (17).And since the height of the air spring is deviated from the control target value, the automatic The leveling valve of the height adjustment mechanism is continuously supplied and exhausted.
発明が解決しようとする課題
上記のごとく、空気ばね台車を有する鉄道車両がカント
逓減区間にある際は、空気ばねの給排気が連続して行な
われる。そのため、空気圧Ｍ機のｆＡｆｒが増え、場合
によっては圧縮空気の供給が追いつかなくなり、高圧空
気供給側の圧力が低下し、給気ができなくなることもあ
る。また、給排気の連続により、車体の振動、騒音を生
じ乗客の乗心地を悪化させる。Problems to be Solved by the Invention As mentioned above, when a railway vehicle having an air spring bogie is in a cant decreasing section, air springs are continuously supplied and exhausted. Therefore, the fAfr of the pneumatic M machine increases, and in some cases, the supply of compressed air cannot keep up, and the pressure on the high-pressure air supply side decreases, making it impossible to supply air. Continuous air supply and exhaust also causes vibrations and noise in the vehicle body, which worsens passenger comfort.
この発明は、空気ばね高さを個々に調整する従来の空気
ばね台車にみられる上記欠点を排除し、鉄道車両がカン
ト逓減区間に停車している間は、空気ばねの給排気を行
なわなくてすむ鉄道車両の空気ばね制御方法を提案する
ものである。This invention eliminates the above-mentioned drawbacks of conventional air spring bogies in which the air spring heights are adjusted individually, and eliminates the need to supply and exhaust the air springs while the railway vehicle is stopped in a cant decreasing section. This paper proposes an air spring control method for railway vehicles.
課題を解決するための手段
上記目的を達成するため、この発明における鉄道車両の
空気ばね制御方法は、空気ばね付きボギー台車を有する
鉄道車両の個々の空気ばね高さを測定して給排気制御を
行なう方式において、緩和曲線上におけるカント逓減を
、前後台車における車体と台車の間の相対ローリング角
の差から検知し、各台車の左右空気ばねの平均高さが目
標値を満足しているとき当該空気ばねの給排気を停止す
ることを特徴とする。Means for Solving the Problems In order to achieve the above object, the air spring control method for a railway vehicle according to the present invention measures the height of each air spring of a railway vehicle having a bogie with an air spring and performs air supply/exhaust control. In this method, the cant reduction on the transition curve is detected from the difference in relative rolling angle between the car body and the bogie in the front and rear bogies, and when the average height of the left and right air springs of each bogie satisfies the target value, the corresponding It is characterized by stopping the supply and exhaust of the air spring.
なお、上記の「相対ローリング角」とは前後台車におい
て、台車に対する車体の幅方向の傾きを意味し、前台車
の相対ローリング角をθ＾後台車の相対ローリング角を
θＢ とすると、例えば下記式によって示される。In addition, the above-mentioned "relative rolling angle" means the inclination of the front and rear bogies in the width direction of the car body with respect to the bogie.If the relative rolling angle of the front bogie is θ^ and the relative rolling angle of the rear bogie is θB, then, for example, the following formula can be obtained. Indicated by
ただし、δ１ δ１は前台車左右空気ばね高さの目標値
に対する偏差
δネδ◆は後台車左右空気ばね高さの
目標値に対する偏差
すは左右空気ばね中心間距離
作 用
各空気ばねの給排気は、空気ばね高さを検出する高さセ
ンサーと制御器により、給気弁および排気弁を自動操作
して行なわれる。However, δ1 δ1 is the deviation δ of the height of the left and right air springs of the front bogie with respect to the target value, δ◆ is the deviation of the height of the left and right air springs of the rear bogie with respect to the target value, and is the distance between the centers of the left and right air springs. This is done by automatically operating the air supply valve and exhaust valve using a height sensor that detects the height of the air spring and a controller.
したがって、平坦路線では個々の空気ばね高さは独立し
て制御しても目標高さに調整することができる。そして
、空気ばねが目標高さを維持している間は給排気は停止
している。Therefore, on flat roads, the heights of the individual air springs can be adjusted to the target height even if they are controlled independently. While the air spring maintains the target height, air supply and exhaust are stopped.
鉄道車両がカント逓減区間にある際は、車体と台車の間
の相対ローリング角の差から軌道のねじれを検知して、
台車ごとに給気または排気を行なって空気ばね高さを制
御し、各台車の左右空気ばね平均高さが目標値内に達す
れば、空気ばねの給排気は停止する。When a railway vehicle is in a section of decreasing cant, track torsion is detected from the difference in relative rolling angle between the car body and bogie.
The height of the air spring is controlled by supplying or exhausting air for each truck, and when the average height of the left and right air springs of each truck reaches a target value, the supply and exhaust of the air spring is stopped.
実施例 この発明の実施例を図面に基づいて説明する。Example Embodiments of the invention will be described based on the drawings.
第１図および第２図は、この発明による空気ばね制御装
置をボルスタレス方式の台車に実施した場合の要部を示
したものである。台車枠（２）の左右両側中央に設けた
空気ばね〈３〉 は下部に連接した補助空気室（３−１
）が台車枠（２）に取着され、空気ばね上面の外筒（３
−２）が車体（１）の底面に当接している。FIGS. 1 and 2 show the main parts of an air spring control device according to the present invention applied to a bolsterless type truck. The air springs <3> installed at the center of both left and right sides of the bogie frame (2) are connected to the auxiliary air chambers (3-1
) is attached to the bogie frame (2), and the outer cylinder (3
-2) is in contact with the bottom surface of the vehicle body (1).
そして外筒（３−２）を貫通して設けた給気管（４）を
電磁給気弁（５）を介装して元空気溜（６）に接続する
。また、同様に外筒（３−２） を貫通して電磁排気
弁（７）と圧力センサー（８）を設ける。そして、車体
（１）の底面と台車枠（２）の側面との間にリンクと信
号発信器からなる高さセンサー（９）を設置する。Then, an air supply pipe (4) provided through the outer cylinder (3-2) is connected to the source air reservoir (6) through an electromagnetic air supply valve (5). Similarly, an electromagnetic exhaust valve (7) and a pressure sensor (8) are provided through the outer cylinder (3-2). A height sensor (9) consisting of a link and a signal transmitter is installed between the bottom of the vehicle body (1) and the side of the bogie frame (2).
前後台車間において車体（１）の底面中央に制御器（１
０〉が設置され、各高さセンサー（９）からの検出信号
を一人力し、また各電磁給気弁（５）および各排気弁（
７〉 に弁開閉操作の信号を発信するように設け、ここ
で空気ばね高さの情報を目標高さと比較演算し、さらに
空気ばね部における車体と台車の間の相対ローリング角
θ＾、θＢを求めて空気ばねの給排気制御を行なうよう
に構成する。A controller (1) is installed at the center of the bottom of the vehicle body (1) between the front and rear bogies.
0> is installed and outputs the detection signal from each height sensor (9), and each electromagnetic air supply valve (5) and each exhaust valve (
7〉 is installed to transmit a signal for valve opening/closing operation, and here the air spring height information is compared with the target height, and the relative rolling angles θ^ and θB between the car body and the bogie at the air spring section are calculated. The configuration is such that air supply/exhaust control of the air spring is performed based on this information.
なお、圧力センサー（８〉 は空気ばねの内圧を計測し
て内圧制御を行なう際に使用するものである。The pressure sensor (8) is used to measure the internal pressure of the air spring and control the internal pressure.
今、第１台車の左右空気ばね高さをｈＩ 、ｈｔ、第２
台車の左右空気ばね高さをり、 、ｈ、 、左右空気ば
ね中心間の距離をｂ、および空気ばねの目標高さをり、
±δ０とし、ｂおよびｈｒ±δ０は設定して制御器に入
力しておく。なおδＯは公差であり、経験的に決めるが
、例えば可動範囲＋８０〜−４０に対しては２．５〜６
ｏＩＩＯ程度とする。Now, the heights of the left and right air springs of the first truck are hI, ht, and the second
The height of the left and right air springs of the truck is , h, , the distance between the centers of the left and right air springs is b, and the target height of the air spring is,
±δ0, and b and hr±δ0 are set and input to the controller. Note that δO is a tolerance and is determined empirically, but for example, for a movable range of +80 to -40, it is 2.5 to 6.
o IIO level.
鉄道車両がカント逓減区間にあるときは、各空気ばねに
付設した高さセンサー（９）により求めた空気ばね高さ
り、、ｈ、、ｈ、、ｈ、の検出信号に基づいて、制御器
（１０）で次のとおり高さの偏差δ工〜δ４が演算され
る。When the railway vehicle is in the cant decreasing section, the controller ( In step 10), the height deviation δ~δ4 is calculated as follows.
δＩ 禦ｈｒ −ｈＩ δ３ １Ｆ１１ ｈ
、 −ｈ ３δ雪 冨ｈ−ｈｔ δ４ 富
ｈ−ｈ４また、上記高さの偏差から、第１台車の空気ば
ね部における車体と台車の間の相対ローリング角θ＾と
第２台車の空気ばね部における車体と台車の間の相対ロ
ーリング角θＢが求められる。δI 禦hr -hI δ3 1F11 h
, -h 3δ Snow Fuji h-ht δ4 Wealth h-h4 Also, from the above height deviation, the relative rolling angle θ^ between the car body and the bogie at the air spring section of the first bogie and the air spring section of the second bogie The relative rolling angle θB between the vehicle body and the bogie at is determined.
θＡ ツ
さらに、第１台車の空気ばね平均高さ偏差δＡと第２台
車の空気ばね平均高さ偏差δＢが求めらδＡｍＩ
制御器（１０）で演算された空気ばね部における相対ロ
ーリング角θ＾、θＢに基づく空気ばねの高さ制御は、
第３図に示すフローチャートにより行なわれる。Further, the air spring average height deviation δA of the first truck and the air spring average height deviation δB of the second truck are determined. δAmI The relative rolling angle θ^ at the air spring section calculated by the controller (10), Air spring height control based on θB is
This is carried out according to the flowchart shown in FIG.
すなわち、第１台車の空気ばね部における相対ローリン
グ角θ＾と第２台車の空気ばね部における相対ローリン
グ角θｂを比較して軌道ねじれを検出する。この場合θ
＾とθＢが同符号であれば、軌道ねじれはないので、通
常の高さ制御が行なわれる。また、θ＾とθＢが逆符号
であれば軌道ねじれがあるので、引き続き空気ばね平均
高さ偏差δ＾とδＤが公差δ０内にあるか、どうかを比
較し、その偏差の値が公差δＯより大きい場合は、制御
器（１０）からの指令により関係する台車ごとに電磁弁
を操作して給気または排気し、空気ばね高さ制御が行な
われる。That is, track twist is detected by comparing the relative rolling angle θ^ at the air spring portion of the first bogie with the relative rolling angle θb at the air spring portion of the second bogie. In this case θ
If ^ and θB have the same sign, there is no orbital twist, and normal height control is performed. Also, if θ^ and θB have opposite signs, there is a trajectory twist, so we will continue to compare whether the air spring average height deviations δ^ and δD are within the tolerance δ0, and the value of the deviation will be less than the tolerance δO. If it is large, the air spring height is controlled by manipulating the solenoid valve for each related truck in response to a command from the controller (10) to supply or exhaust air.
この際の給排気は、左右空気ばねに同時に給気または排
気を行なってもよいし、片方の空気ばねだけで給気また
は排気を行なってもよい。At this time, air may be supplied or exhausted to the left and right air springs at the same time, or only one of the air springs may be used to supply or exhaust air.
上記の自動操作により、左右空気ばね平均高さが目標値
り、±ｈ、となれば空気ばねの給排気は停止する。Through the above automatic operation, when the average height of the left and right air springs reaches the target value, ±h, the supply and exhaust of the air springs is stopped.
発明の効果
鉄道車両が緩和曲線に停止している際、前後台車の空気
ばね部における車体と台車の間の相対ローリング角の差
から軌道のねじれを検知して、台車ごとに空気ばねの給
排気を行ない、左右空気ばねの平均高さを制御するため
、緩和曲線上の車両を安定状態に保持できる。また、空
気ばね高さが目標値内にある際は空気ばねの給排気は停
止しているから空気圧縮機の負荷を低減できる。Effects of the Invention When a railway vehicle is stopped on a transition curve, track torsion is detected from the difference in relative rolling angle between the car body and the bogie in the air spring sections of the front and rear bogies, and the air springs are supplied and discharged for each bogie. Since the average height of the left and right air springs is controlled, the vehicle can be maintained in a stable state on the transition curve. Further, when the height of the air spring is within the target value, the supply and exhaust of the air spring is stopped, so the load on the air compressor can be reduced.
第１図は、この発明を実施するための空気ばね制御装置
を装備した鉄道車両用ボルスタレス台車の要部を示す説
明図、第２図は同じく１車両分の空気ばね制御装置の要
部を示す斜視図、第３図はこの発明による空気ばね高さ
制御のフローチャート、第４図は鉄道車両がカント逓減
区間にある際の軌道ねじれと前後台車の空気ばねの状態
を示す説明図である。
１・・・車体
３・・・空気ばね
５・・・電磁給気弁
２・・・台車枠
４・・・給気管
６・・・元空気溜
７・・・電磁排気弁
９・・・高さセンサー
１１・・・前台車
８・・・圧力センサー
１０・・・制御器
１２・・・後台車FIG. 1 is an explanatory diagram showing the main parts of a bolsterless bogie for a railway vehicle equipped with an air spring control device for implementing the present invention, and FIG. 2 also shows the main parts of the air spring control device for one vehicle. The perspective view and FIG. 3 are a flowchart of air spring height control according to the present invention, and FIG. 4 is an explanatory diagram showing track torsion and the state of the air springs of the front and rear bogies when the railway vehicle is in a cant decreasing section. 1... Vehicle body 3... Air spring 5... Electromagnetic air supply valve 2... Bogie frame 4... Air supply pipe 6... Source air reservoir 7... Electromagnetic exhaust valve 9... High Sensor 11...Front truck 8...Pressure sensor 10...Controller 12...Rear truck
Claims (1)
空気ばね高さを測定して給排気制御を行なう方式におい
て、緩和曲線上におけるカント逓減を、前後台車におけ
る車体と台車の間の相対ローリング角の差から検知し、
各台車の左右空気ばねの平均高さが目標値を満足してい
る間は、当該空気ばねの給排気を停止することを特徴と
する鉄道車両の空気ばね制御方法。1. In a system that measures the height of each air spring of a railway vehicle having a bogie with air springs to perform air supply/exhaust control, the decrease in cant on the transition curve is calculated by calculating the relative rolling angle between the car body and the bogie in the front and rear bogies. Detect from the difference,
An air spring control method for a railway vehicle, characterized in that air supply and exhaust of the air spring is stopped while the average height of the left and right air springs of each bogie satisfies a target value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1218234A JPH0659825B2 (en) | 1989-08-24 | 1989-08-24 | Railway vehicle air spring control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1218234A JPH0659825B2 (en) | 1989-08-24 | 1989-08-24 | Railway vehicle air spring control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0382665A true JPH0382665A (en) | 1991-04-08 |
| JPH0659825B2 JPH0659825B2 (en) | 1994-08-10 |
Family
ID=16716707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1218234A Expired - Fee Related JPH0659825B2 (en) | 1989-08-24 | 1989-08-24 | Railway vehicle air spring control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0659825B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5084040A (en) * | 1990-01-25 | 1992-01-28 | The West Company, Incorporated | Lyophilization device |
| JPH0554859U (en) * | 1991-12-26 | 1993-07-23 | デルタ工業株式会社 | Auto change |
| JP2007131125A (en) * | 2005-11-10 | 2007-05-31 | Central Japan Railway Co | Method of detecting abnormal condition of vehicle body inclination device |
| CN106240589A (en) * | 2016-09-22 | 2016-12-21 | 中车南京浦镇车辆有限公司 | It is suitable for the air intake structure of different air spring spacing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5576754A (en) * | 1978-12-06 | 1980-06-10 | Hitachi Ltd | Controller for air spring for railroad vehicle |
| JPS5941427A (en) * | 1982-09-01 | 1984-03-07 | Nippon Kokan Kk <Nkk> | Roll-cooling means for metal strip |
-
1989
- 1989-08-24 JP JP1218234A patent/JPH0659825B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5576754A (en) * | 1978-12-06 | 1980-06-10 | Hitachi Ltd | Controller for air spring for railroad vehicle |
| JPS5941427A (en) * | 1982-09-01 | 1984-03-07 | Nippon Kokan Kk <Nkk> | Roll-cooling means for metal strip |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5084040A (en) * | 1990-01-25 | 1992-01-28 | The West Company, Incorporated | Lyophilization device |
| JPH0554859U (en) * | 1991-12-26 | 1993-07-23 | デルタ工業株式会社 | Auto change |
| JP2007131125A (en) * | 2005-11-10 | 2007-05-31 | Central Japan Railway Co | Method of detecting abnormal condition of vehicle body inclination device |
| CN106240589A (en) * | 2016-09-22 | 2016-12-21 | 中车南京浦镇车辆有限公司 | It is suitable for the air intake structure of different air spring spacing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0659825B2 (en) | 1994-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2653317B2 (en) | Body inclination control method for railway vehicle with air spring | |
| JPS58174007A (en) | Regulator for height of automobile | |
| MXPA06002086A (en) | Air suspension system with supply air restriction valve. | |
| WO1989000927A1 (en) | Control apparatus for a vehicular suspension system | |
| JPH03511A (en) | Car height control method for vehicle with car height adjuster | |
| MXPA06001940A (en) | Air suspension system with air shut off valve. | |
| US7621537B2 (en) | Height control valve for vehicle axle/suspension system | |
| JPH10287241A (en) | Car body tilt control device for rolling stock and its car body tilt control method | |
| JPH0382665A (en) | Air spring control method for railroad vehicle | |
| WO2017061087A1 (en) | Railway vehicle provided with vehicle body inclining device, and train composition | |
| JPH05116627A (en) | Vehicle body control method for railway rolling stock | |
| JP4292973B2 (en) | Railway vehicle body tilt control method and apparatus | |
| KR100580529B1 (en) | pressure regulation system for tire | |
| JPH0382666A (en) | Control method for railroad vehicle on mild curve | |
| JP2832329B2 (en) | Vehicle body tilt control method for railway vehicles | |
| JPH03167070A (en) | Electronic control method of air spring for rolling stock | |
| JPH06270805A (en) | Fail-safe method of vehicle body inclination control of rolling stock | |
| JPH0225683Y2 (en) | ||
| JPH03178862A (en) | Wheel load fluctuation preventing method for rolling stock | |
| JP2006044419A (en) | Railroad vehicle | |
| JP2827255B2 (en) | Method and apparatus for preventing wheel load fluctuation of railway vehicle | |
| JPH03200470A (en) | Method of preventing body from colliding with stopper at transition curve | |
| JP2894409B2 (en) | Vehicle inclination control device | |
| JPH0415160A (en) | Controlling method for attitude of vehicle body of train | |
| JP2003063228A (en) | Vehicle height adjusting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20070810 Year of fee payment: 13 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080810 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080810 Year of fee payment: 14 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090810 Year of fee payment: 15 |
|
| LAPS | Cancellation because of no payment of annual fees |