JPH0741914Y2 - Assembly fan - Google Patents
Assembly fanInfo
- Publication number
- JPH0741914Y2 JPH0741914Y2 JP1988135007U JP13500788U JPH0741914Y2 JP H0741914 Y2 JPH0741914 Y2 JP H0741914Y2 JP 1988135007 U JP1988135007 U JP 1988135007U JP 13500788 U JP13500788 U JP 13500788U JP H0741914 Y2 JPH0741914 Y2 JP H0741914Y2
- Authority
- JP
- Japan
- Prior art keywords
- fan
- assembly
- spider
- blade
- blades
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/325—Rotors specially for elastic fluids for axial flow pumps for axial flow fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/34—Blade mountings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案はエンジンの冷却等に用いる組立ファンに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an assembly fan used for cooling an engine or the like.
第７図はブレード20とスパイダ21による従来の組立式フ
ァンの一例を示す図でブレード20はスパイダ21により前
後からはさまれてブレード用リベット22でスパイダに固
定されている。FIG. 7 is a view showing an example of a conventional assembly type fan composed of the blade 20 and the spider 21. The blade 20 is sandwiched by the spider 21 from the front and rear and fixed to the spider by the blade rivet 22.
スパイダ21はプレート26を重ねてスパイダ用リベット23
で組立てる。Spider 21 stacks plate 26 and spider rivet 23
Assemble with
ブレード20の形状と数はリベット作業を可能にするため
に隣りあったブレード20同志が干渉しないようにする必
要がある。従ってブレード20の幅を大きくすればブレー
ド枚数を減らす必要がありブレード枚数を増加すればブ
レード20を幅を小さくする必要がある。The shape and number of blades 20 must be such that adjacent blades 20 do not interfere with each other to allow riveting. Therefore, if the width of the blade 20 is increased, it is necessary to reduce the number of blades, and if the number of blades is increased, it is necessary to reduce the width of the blade 20.
上記従来の組立ファンには解決すべき次の課題があっ
た。即ち、 （１）スパイダ部とファンブレードの構造上、ファンブ
レードは回転軸方向から見て重なる部分があってはリベ
ットの作業が不可能になるため製作できなかった。The conventional assembly fan has the following problems to be solved. That is, (1) due to the structure of the spider portion and the fan blade, the fan blade could not be manufactured because the rivet work would be impossible if there was an overlapping portion when viewed from the rotation axis direction.
このためブレード数や大きさの制限から送風量の増加が
得にくく、かつ、送風圧力は脈動を生じやすかった。For this reason, it was difficult to increase the air flow rate due to the limitation of the number of blades and the size, and the air flow pressure was likely to cause pulsation.
（２）送風量を増加しようとすれば回転数を増加させる
ため、ブレードの数が少ないと振動や騒音が増加すると
いう問題があるが、リベット作業に制限されてブレード
の数を増やせない。(2) If the number of blades is increased, the number of rotations is increased. Therefore, if the number of blades is small, vibration and noise increase. However, the number of blades cannot be increased due to the rivet work.
本考案は上記課題の解決手段として、回転軸廻りに所定
の角度で配分された複数枚のファンブレードを有してそ
のスパイダが金属よりなるファン組立体と、２組の同フ
ァン組立体のスパイダを回転軸方向にその板厚の半分づ
つオフセットしファンピッチ付与のため各所要の向きに
ねじた後同一オフセット面を向い合わせ回転軸廻りに所
定角度，相互にずらして重ねた状態で固定する固定手段
とを具備してなることを特徴とする組立ファン、を提供
しようとするものである。The present invention is, as a means for solving the above-mentioned problems, a fan assembly having a plurality of fan blades distributed at a predetermined angle around a rotation axis and having a spider made of metal, and two sets of the same fan assembly spiders. The plates are offset by half their plate thickness in the direction of the rotation axis, twisted in the required directions to give the fan pitch, and then the same offset surfaces are faced to each other. It is intended to provide an assembling fan characterized by comprising means.
本考案は上記のように構成されるので次の作用を有す
る。即ち、スパイダが金属よりなるファン組立体を回転
軸の方向に２組重ねて固定するので、単位のファン組立
体の軸まわりのファンブレードの配分はまばらとなり、
ブレードのリベット作業が隣接ブレードの邪魔されるこ
とがない。この結果、ブレードの数や幅を任意に選択
し、増すことができる。Since the present invention is constructed as described above, it has the following effects. That is, since the spider fixes two fan assemblies made of metal in the direction of the rotation axis, the fan blades are distributed sparsely around the axis of the unit fan assembly.
Blade riveting is not disturbed by adjacent blades. As a result, the number and width of the blades can be arbitrarily selected and increased.
また、ファン組立体のスパイダを回転軸方向にその板厚
の半分つづオフセットし、ファンピッチ付与のための各
所要の向きにねじた後、同一オフセット面を向い合わせ
回転軸廻りに所定角度，相互にずらして重ねた状態で固
定するので、隣接する別のファン組立体との回転面が自
動的に面一になるため、回転軸方向にファン組立体を重
ねるにも拘らず、そのような重ねの影響の全くない組立
ファンを得られる。In addition, the spider of the fan assembly is offset by half its plate thickness in the direction of the rotation axis, twisted in each of the required directions for imparting the fan pitch, and then the same offset surface is faced to each other at a predetermined angle around the rotation axis. Since they are fixed in a state of being overlapped with each other, the rotation surface with another fan assembly adjacent to each other automatically becomes flush with each other. It is possible to obtain an assembly fan that is completely unaffected.
本考案の一実施例について第１図ないし第６図により説
明する。An embodiment of the present invention will be described with reference to FIGS.
第１図は本実施例の組立ファンの正面図で第１図（ａ）
は第１図の、後述する後側スパイダ1b及び前側スパイダ
2bの側面図である。FIG. 1 is a front view of the assembly fan of this embodiment, and FIG.
Is a rear spider 1b and a front spider shown in FIG.
It is a side view of 2b.
図において、組立ファンは、後述する、後側組立ファン
１及び前側組立ファン２を回転軸心01の方向に後述の通
り、スパイダのオフセットを対向（相互に近づく方向）
して重ねてスパイダ用リベット５を用い、軸まわりを８
個所、等ピッチで緊締してある。図示しない回転軸への
取付けは、中央のガイド穴７内に回転軸を挿通し、軸ま
わりに等ピッチで配設した６個所の取付穴６に所定のボ
ルトを挿通してネジ止めして行う。後側組立ファン１と
前側組立ファン２とは軸方向に重ねられている相互の回
転面に軸方向の差があるので、その差を補正するため、
本実施例の場合は後側スパイダ1b、前側スパイダ2bを板
厚の半分だけオフセットして対向させ、相互の回転面を
面一にしてある。以下に後側組立ファン１及び前側組立
ファン２の詳細について説明する。In the figure, the assembly fans are arranged such that the rear assembly fan 1 and the front assembly fan 2 to be described later face the offset of the spiders in the direction of the rotational axis 01 (direction toward each other) as described later.
And stack them with rivet 5 for spider,
The parts are tightened at equal pitches. Mounting on a rotary shaft (not shown) is performed by inserting the rotary shaft into the central guide hole 7 and inserting predetermined bolts into the six mounting holes 6 arranged at equal pitches around the shaft and screwing. . The rear assembly fan 1 and the front assembly fan 2 have axial differences in their mutual rotational surfaces that are overlapped in the axial direction. Therefore, in order to correct the difference,
In the case of this embodiment, the rear side spider 1b and the front side spider 2b are offset from each other by a half of the plate thickness and face each other so that their mutual rotation surfaces are flush with each other. The details of the rear assembly fan 1 and the front assembly fan 2 will be described below.
第２図は後側組立ファン１を第１図に示す姿勢のまま取
出して示した正面図で、第２図（ａ）はそこに示される
中心線方向に直近のブレード1a等を見た図である。FIG. 2 is a front view showing the rear assembly fan 1 taken out in the posture shown in FIG. 1, and FIG. 2 (a) is a view of the blade 1a and the like closest thereto in the direction of the center line shown therein. Is.
図において、金属の板材よりなる後側スパイダ1bには十
字方向に４本のアーム1cが突設されており、各アーム1c
端には図示のようにブレード1aが当接され、その上から
プレート３を添えてブレード用リベット４で共締めされ
ている。なお、図ではスパイダ用リベット５のリベット
穴5a,取付穴６及びガイド穴７が示されているが、これ
らの穴は後側組立ファン１を組立てる過程で明けられる
必要はなく、第１図に示す組立ファンに組立てた後に明
けられてよく、特にリベット穴5aはリベットの締結力を
完全にすること及びリベット間ピッチに狂を生じさせな
いためにも、第１図の状態で明けられるのが望ましい。In the figure, a rear spider 1b made of a metal plate is provided with four arms 1c projecting in the cross direction.
As shown in the drawing, a blade 1a is brought into contact with the end, and a plate 3 is attached from above the blade 1a and they are fastened together with a blade rivet 4. Although the rivet hole 5a, the mounting hole 6 and the guide hole 7 of the spider rivet 5 are shown in the drawing, these holes do not have to be opened in the process of assembling the rear assembly fan 1, and are shown in FIG. It may be opened after assembling to the assembling fan shown, and in particular, the rivet hole 5a is preferably opened in the state shown in FIG. 1 in order to complete the fastening force of the rivet and to prevent the pitch between the rivets from being deviated. .
以上の通り、後側組立ファン１は軸まわり十字状に設け
られたアーム1cにブレード1aをリベット止めするので第
２図からも明らかなように、各ブレード1a間は十分に離
れており、隣接するブレード1aがリベット作業の障害に
なるという不具合は全くなく、容易に組立作業を行うこ
とができる。As described above, since the rear assembly fan 1 rivets the blade 1a to the arm 1c provided in a cross shape around the axis, as is apparent from FIG. 2, the blades 1a are sufficiently separated from each other, and There is no problem that the blade 1a that does not interfere with the rivet work, and the assembly work can be easily performed.
次に前側組立ファン２の詳細について説明する。第３図
は前側組立ファン２を第１図に示す姿勢のまま取出して
示した正面図で、第３図（ａ）はそこに示される中心線
方向に真近のブレード1aを見た図である。Next, details of the front assembly fan 2 will be described. FIG. 3 is a front view showing the front assembly fan 2 taken out in the posture shown in FIG. 1, and FIG. 3 (a) is a view of the blade 1a closest to the center line direction shown therein. is there.
前側組立ファン２の場合も後側組立ファン１の場合と同
様、リベット穴5a,取付穴６及びガイド穴７はこの組立
て段階で予め明けられる必要はないが、仮に予め穴明け
るとすればそれらの穴とアーム1cとの軸まわりの位相が
相違するのみで、その他は上記後側組立ファン１の場合
と同様の構成である。In the case of the front side assembly fan 2 as well, as in the case of the rear side assembly fan 1, the rivet hole 5a, the mounting hole 6 and the guide hole 7 do not need to be pre-drilled at this assembly stage, but if they are pre-drilled, those Only the phase around the axis of the hole and the arm 1c is different, and the other configurations are the same as those of the rear assembly fan 1.
第５図は後側スパイダ1bの正面図で、第６図は第５図の
VI−VI矢視拡大断面図である。第６図において後側スパ
イダ1bのアーム1cはファンピッチ（ピッチ角）を創出す
るためのねじり部Ｙの部位で前側スパイダ2b側に板厚の
半分のＴ相当部分だけオフセットしてある。これにより
ねじり等を除く後側スパイダ1bのアーム1cは後側スパイ
ダ1bを対向させたに相当する前側スパイダ2bのアーム1c
と面一の回転面に並ぶことになる。Fig. 5 is a front view of the rear spider 1b, and Fig. 6 is shown in Fig. 5.
FIG. 6 is an enlarged sectional view taken along the line VI-VI. In FIG. 6, the arm 1c of the rear side spider 1b is offset to the front side spider 2b side by a portion corresponding to T, which is half the plate thickness, at a portion of a twisted portion Y for creating a fan pitch (pitch angle). As a result, the arm 1c of the rear spider 1b excluding twisting etc. is equivalent to the arm 1c of the front spider 2b corresponding to the case where the rear spider 1b is opposed.
And will be lined up on the same plane of rotation.
なお、上記した通り後側組立ファン１及び前側組立ファ
ン２の段階でリベット穴5a、取付穴６ないしはガイド穴
７を設ける必要はないが量産の都合等から補用品をも考
慮して仮に予めこれらの穴を設ける場合は前側組立ファ
ン２と後側組立ファン１とは第４図と第５図に示すよう
な関係になる。因みに前側組立ファン２のアーム1cに対
する取付穴６の角度Ｘは15°であるのに対し、後側組立
ファン１の場合の角度Ｚは30°となる。As described above, it is not necessary to provide the rivet hole 5a, the mounting hole 6 or the guide hole 7 at the stage of the rear side assembly fan 1 and the front side assembly fan 2, but for convenience of mass production etc. When the holes are provided, the front assembly fan 2 and the rear assembly fan 1 have a relationship as shown in FIGS. 4 and 5. Incidentally, the angle X of the mounting hole 6 with respect to the arm 1c of the front assembly fan 2 is 15 °, whereas the angle Z of the rear assembly fan 1 is 30 °.
ファンブレード同志の固定手段もリベットに限定される
ものではなく、ネジ止め、溶接、接着その他、考案の目
的を逸脱しない範囲でどのような手段が選ばれてもよ
い。ブレード自身の数も実施例の８枚に限定されるもの
ではなく必要に応じて増減されてよい。The fixing means of the fan blades is not limited to the rivet, and any means such as screwing, welding, adhering or the like may be selected without departing from the purpose of the invention. The number of blades themselves is not limited to eight in the embodiment, and may be increased or decreased as necessary.
以上の通り本実施例によればブレードの数に制限される
ことなくリベット作業を行えるのでブレードの数及びブ
レード幅を任意に選択し、増加することができる。As described above, according to the present embodiment, the rivet work can be performed without being limited by the number of blades, so that the number of blades and the blade width can be arbitrarily selected and increased.
本考案は上記のように構成されるので次の効果を有す
る。Since the present invention is configured as described above, it has the following effects.
（１）複数のファン組立体を重ねることによりブレード
数が多くかつブレード幅の大きいファン構造が製作可能
になり送風量の増加と送風圧力の変化が小さい、高性能
のファンが得られる。(1) By stacking a plurality of fan assemblies, a fan structure having a large number of blades and a large blade width can be manufactured, and a high-performance fan in which an increase in air flow and a change in air pressure are small can be obtained.
（２）一定風量を得る場合には従来ファンより小径化す
ることができ、又は低速回転により低騒音化を計ること
ができる。(2) When obtaining a constant air volume, the diameter can be made smaller than that of the conventional fan, or low noise can be achieved by rotating at low speed.
（３）スパイダを軸方向に板厚の半分づつオフセットし
て対向させ、隣接ファン組立体と回転面を面一にするの
で、ファン組立体を回転軸方向に重ねて構成するにも拘
らず一体成形したファンと全く同等の性能が得られる。(3) The spiders are offset by half the plate thickness in the axial direction so as to face each other, and the rotation surface is flush with the adjacent fan assembly, so that the fan assembly is integrated despite being stacked in the rotation axis direction. The performance is exactly the same as the molded fan.
（４）一型式のファン組立体のみのスパイダを各所要の
向きにねじて２組用いることにより組立ファンを得られ
るので、主たる材料、治具がすべて一型式で足り、製造
コストが著しく低減する。(4) Since an assembly fan can be obtained by twisting two sets of spiders having only one type of fan assembly in desired directions, all the main materials and jigs need only be one type, and the manufacturing cost is significantly reduced. .
（５）スパイダが金属性なので、耐熱性が高く、エンジ
ン等の高温部でも変形を生じない。(5) Since the spider is metallic, it has high heat resistance and does not deform even at high temperatures such as an engine.
第１図は本考案の一実施例の組立ファンの正面図、第１
図（ａ）は第１図の後側スパイダ及び前側スパイダの側
面図、第２図は第１図の後側組立ファン１の正面図、第
２図（ａ）はその中心線方向に見た直近の第２図のブレ
ード1a等の図、第３図は第１図の前側組立ファン２の正
面図、第３図（ａ）はその中心線方向に見た直近の第３
図のブレード1a等の図、第４図は第３図の前側スパイダ
2aの正面図、第５図は第２図の後側スパイダ1bの正面
図、第６図は第５図のVI−VI矢視拡大断面図、第７図は
従来の組立ファンの正面図、第７図（ａ）はその中心線
方向に見た直近の第７図のブレード20の図である。 １…後側組立ファン、1a…ブレード、1b…後側スパイ
ダ、1c…アーム、２…前側組立ファン、2b…前側スパイ
ダ、３…プレート、４…ブレード用リベット、５…スパ
イダ用リベット、5a…リベット穴、６…取付穴、７…ガ
イド穴FIG. 1 is a front view of an assembly fan according to an embodiment of the present invention.
1A is a side view of the rear side spider and the front side spider of FIG. 1, FIG. 2 is a front view of the rear side assembly fan 1 of FIG. 1, and FIG. FIG. 3 is a front view of the front assembly fan 2 of FIG. 1, and FIG. 3 (a) is the most recent view of the blade 1a of FIG.
The blade 1a of the figure, etc., and FIG. 4 is the front spider of FIG.
2a is a front view, FIG. 5 is a front view of the rear spider 1b of FIG. 2, FIG. 6 is an enlarged sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is a front view of a conventional assembly fan. FIG. 7 (a) is the most recent view of the blade 20 of FIG. 7 as seen in its centerline direction. 1 ... Rear assembly fan, 1a ... Blade, 1b ... Rear spider, 1c ... Arm, 2 ... Front assembly fan, 2b ... Front spider, 3 ... Plate, 4 ... Blade rivet, 5 ... Spider rivet, 5a ... Rivet hole, 6 ... Mounting hole, 7 ... Guide hole
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭57−160993（ＪＰ，Ｕ) 実開 昭50−119008（ＪＰ，Ｕ) 実開 昭59−94119（ＪＰ，Ｕ) 実開 昭62−108232（ＪＰ，Ｕ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Shou 57-160993 (JP, U) Seki 50-119008 (JP, U) Seki 59-94119 (JP, U) Seki 62- 108232 (JP, U)
Claims (1)
枚のファンブレードを有してそのスパイダが金属よりな
るファン組立体と、２組の同ファン組立体のスパイダを
回転軸方向にその板厚の半分づつオフセットしファンピ
ッチ付与のため各所要の向きにねじた後同一オフセット
面を向い合わせ回転軸廻りに所要角度，相互にずらして
重ねた状態で固定する固定手段とを具備してなることを
特徴とする組立ファン。1. A fan assembly having a plurality of fan blades distributed at a predetermined angle around a rotating shaft, the spider of which is made of metal, and two sets of the same spider of the fan assembly are arranged in the rotating shaft direction. It is provided with a fixing means for offsetting each half of the plate thickness and twisting in the respective desired directions to impart a fan pitch, and then aligning the same offset surfaces with each other around the rotation axis by a required angle and stacking them in a mutually shifted state. An assembly fan that is characterized by:
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988135007U JPH0741914Y2 (en) | 1988-10-18 | 1988-10-18 | Assembly fan |
| CA 2000296 CA2000296C (en) | 1988-10-18 | 1989-10-06 | Knocked-down fan for engine cooling and other applications |
| DE1989627972 DE68927972T2 (en) | 1988-10-18 | 1989-10-17 | Compound fan for machine cooling and other applications |
| EP19890119287 EP0364969B1 (en) | 1988-10-18 | 1989-10-17 | Knocked-down fan for engine cooling and other applications |
| US07/619,486 US5083904A (en) | 1988-10-18 | 1990-11-29 | Knocked-down fan for engine cooling and other applications |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988135007U JPH0741914Y2 (en) | 1988-10-18 | 1988-10-18 | Assembly fan |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0256898U JPH0256898U (en) | 1990-04-24 |
| JPH0741914Y2 true JPH0741914Y2 (en) | 1995-09-27 |
Family
ID=15141752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988135007U Expired - Lifetime JPH0741914Y2 (en) | 1988-10-18 | 1988-10-18 | Assembly fan |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0364969B1 (en) |
| JP (1) | JPH0741914Y2 (en) |
| CA (1) | CA2000296C (en) |
| DE (1) | DE68927972T2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005264842A (en) * | 2004-03-19 | 2005-09-29 | Komatsu Ltd | Cooling fan and its segment |
| CN103671252A (en) * | 2013-12-18 | 2014-03-26 | 江苏大学 | Impeller of plant frost-prevention draught fan |
| CN108817723A (en) * | 2018-08-01 | 2018-11-16 | 四川天宇坤建空调设备有限公司 | A kind of fan blade welder and its application method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2098640A (en) * | 1936-05-15 | 1937-11-09 | Hayes Ind Inc | Fan construction |
| US2140017A (en) * | 1938-07-15 | 1938-12-13 | Westinghouse Electric & Mfg Co | Fan construction |
| US2328072A (en) * | 1941-06-18 | 1943-08-31 | Edmund E Hans | Fan |
| US2500071A (en) * | 1948-03-12 | 1950-03-07 | Edmund E Hans | Fan |
| US2853140A (en) * | 1956-01-03 | 1958-09-23 | Brookside Products Company Inc | Resiliently mounted impeller blades |
| US3147811A (en) * | 1962-12-24 | 1964-09-08 | Torrington Mfg Co | Fan assembly |
| JPS50119008U (en) * | 1974-03-14 | 1975-09-29 | ||
| DE2710041A1 (en) * | 1977-03-08 | 1978-09-14 | Torin Corp | Propeller fan with spider blades - has central twist in blade with spot welded supports |
| JPS57160993U (en) * | 1981-04-03 | 1982-10-08 |
-
1988
- 1988-10-18 JP JP1988135007U patent/JPH0741914Y2/en not_active Expired - Lifetime
-
1989
- 1989-10-06 CA CA 2000296 patent/CA2000296C/en not_active Expired - Fee Related
- 1989-10-17 EP EP19890119287 patent/EP0364969B1/en not_active Expired - Lifetime
- 1989-10-17 DE DE1989627972 patent/DE68927972T2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE68927972D1 (en) | 1997-05-22 |
| JPH0256898U (en) | 1990-04-24 |
| EP0364969B1 (en) | 1997-04-16 |
| CA2000296A1 (en) | 1990-04-18 |
| DE68927972T2 (en) | 1997-07-24 |
| CA2000296C (en) | 2000-01-11 |
| EP0364969A1 (en) | 1990-04-25 |
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