EP0401471B1 - Intake air filter for combustion engines - Google Patents

Intake air filter for combustion engines Download PDF

Info

Publication number
EP0401471B1
EP0401471B1 EP90104168A EP90104168A EP0401471B1 EP 0401471 B1 EP0401471 B1 EP 0401471B1 EP 90104168 A EP90104168 A EP 90104168A EP 90104168 A EP90104168 A EP 90104168A EP 0401471 B1 EP0401471 B1 EP 0401471B1
Authority
EP
European Patent Office
Prior art keywords
housing
bearing member
intake air
sealing
air filter
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
Application number
EP90104168A
Other languages
German (de)
French (fr)
Other versions
EP0401471A1 (en
Inventor
Volker Ernst
Arthur Klotz
Rudolf Leipelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Priority to AT90104168T priority Critical patent/ATE74404T1/en
Publication of EP0401471A1 publication Critical patent/EP0401471A1/en
Application granted granted Critical
Publication of EP0401471B1 publication Critical patent/EP0401471B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners

Definitions

  • the invention relates to an intake air filter for internal combustion engines according to the preamble of claim 1.
  • an air filter for intake air filtering with an essentially cylindrical housing which has a raw air inlet which is arranged tangentially on the housing and where a filter insert is located in this housing, which is flowed through radially.
  • the housing itself can be connected to a cylindrical intake air collector via a bayonet lock.
  • a safety cartridge in this intake air collector, which should prevent dirt and dust from entering the intake air nozzle when changing the filter insert.
  • a seal between the safety cartridge and the filter insert takes place in that, after the bayonet catch engages, there is an axial displacement of the filter insert in the direction of the safety cartridge, through which the end face of the filter insert comes into contact with the end face of the safety cartridge.
  • This axial displacement is with a on the end wall of the Adjustment screw arranged housing, which exerts an axial movement on the end plate of the filter insert.
  • a disadvantage of this known device is that there must be a very large amount of free space around the housing for installing and removing the filter insert.
  • the invention is therefore based on the object of providing an intake air filter for internal combustion engines which enables the filter insert to be exchanged in a simple manner even in confined spaces.
  • a major advantage of this solution is the fact that an axial movement of the housing is not necessary when installing or removing.
  • the housing When the housing is connected to a corresponding contact part, the housing is introduced from above in a direction that runs essentially parallel to the sealing surface on the contact part and, in order to avoid a shear movement that could act on the sealing element when inserting the housing, this housing spread from the system part at a slight axial alignment angle. This spreading takes place up to the position at which the sealing element and the sealing surface face each other concentrically.
  • the housing can be tilted and then clipped onto the system part.
  • a pot-shaped housing is provided, the unfiltered air flowing radially through a filter cartridge.
  • This filter cartridge carries the sealing element in the form of a sealing ring on its annular end disk facing the system part.
  • This annular end plate can also be provided with guide vanes. This creates an axial cyclone that improves dust separation.
  • the housing has two sliding shoes which are guided along in the sliding guides when the housing is inserted into the connection region of the system part and brought into the corresponding position.
  • the slide guides are designed so that the slide shoes in the correct position specify a precisely defined pivot point for the housing, so that tilting or moving the housing when connecting to the system part is not possible.
  • a particularly advantageous embodiment of the invention is that two spacers are provided on the housing. These two spacers are arranged outside the sealing area of the housing and stabilize the insertion movement of the housing into the connection position. If the distance between the spacer and sliding shoes is chosen as large as possible, then there is also no risk of an undefined tilting movement. The housing is thus positively guided in all directions during installation and removal, so that neither an incorrect connection of the housing to the system part nor damage to the sealing ring is possible.
  • a further embodiment of the invention provides for a handle to be arranged on the housing.
  • this can have a centering lug which is inserted between centering surfaces.
  • a safety cartridge is arranged in the system part.
  • This safety cartridge prevents dust or dirt from entering the clean air area when changing the filter cartridge.
  • the end plate of the safety cartridge advantageously forms the sealing surface on which the sealing ring of the filter cartridge is placed.
  • the housing If the housing has been positioned after changing the filter cartridge, then the housing must be attached to the system part. This is done in that the sliding shoes are supported on the sliding guide and at the same time exercise the function of a holding device. It is therefore sufficient if one or two hook fasteners are attached to the side opposite the sliding shoes, so that three or four holding devices are formed on the circumference of the housing.
  • the intake air filter according to Figure 1 consists essentially of two elements.
  • a housing part or system part 10 is fixedly arranged on a mounting wall 11.
  • a specific installation space is specified for the entire intake air filter and is delimited by the line 43 shown in broken lines.
  • a safety cartridge 15 is located within the housing part 10. This safety cartridge prevents dirt from penetrating into the intake air side when the filter cartridge 13 is replaced.
  • Both the housing part 10 and the housing 12 are cup-shaped.
  • a first guide and fastening element for the housing 12 is a sliding guide 16.
  • This sliding guide 16 has a funnel-shaped shape and is directly connected to the housing part 10.
  • the housing part 10 is expediently a plastic injection molded part, which includes the sliding guide.
  • the housing 12, which is also a plastic injection molded part, is provided with a sliding block 17.
  • this sliding shoe first has the task of limiting the movement of the housing 12 in connection with the sliding guide 16 and then prescribing the end position, ie the final position in which the housing 12 can be fastened.
  • this slide shoe serves as a fastening element, ie the axial securing of the housing 12 in the installed state is carried out by the slide shoe.
  • a seal must be made between the filter cartridge 13 and the security cartridge 15 on their opposite faces. This sealing takes place by means of a sealing ring 19 arranged on the end plate 18 of the filter cartridge 13.
  • this sealing ring 19 will graze along the safety cartridge or on end faces of walls of the housing part 10 and thereby damage or Destruction of the sealing ring 19 occurs due to shear forces.
  • the sealing pressure is applied, the sealing ring itself and the sealing surface are laterally displaced with respect to one another, producing abrasion. This can also damage the sealing ring or detach it from the filter insert.
  • the housing 12 carries a spacer in the form of a nose 20.
  • This nose supports abuts on a sliding surface or support surface 21 and thus causes the housing 12 to spread apart from the housing part 10. Only when the housing 12 is in its correct position, ie in the installed position, can both parts be joined together.
  • a recess 22 is provided on the housing part 10, into which the nose 20 dips and thus enables the sealing surfaces to meet.
  • a handle 23 is provided for handling the housing 12. In the area of this handle there are two hook closures with which the housing 12 is fastened to the housing part 10.
  • FIG. 2 shows a more detailed illustration of the entire intake air filter.
  • the housing 12 is shown in the installed state.
  • This figure also shows the flow pattern of the intake air.
  • This is fed via the intake air nozzle 24 to an annular chamber 25 in the housing part 10. From this annular chamber, the intake air flows through guide vanes 26 into an unfiltered air space 27. Because of the swirl generated by the guide vanes, coarse dust separation takes place in this room. The dust can be removed through the removal opening 28.
  • the intake air flows through the filter cartridge 13 in the radial direction from the outside inwards and then the safety cartridge 15 from the inside outwards and reaches the outlet side of the filter with the connecting piece 30 via an annular chamber 29.
  • the safety cartridge 15 is screwed via its end plate 31 to the intermediate wall 32 of the housing part 10.
  • This end plate 31 also carries a sealing ring 33.
  • the slide shoe 17 lies at the contact point 34 on the slide guide 16 on. This ensures in the installed state that a secure and effective connection of the housing 12 to the housing part 10 takes place in the region of the sliding guides. It is also essential here that when the housing 12 is removed or attached, the slide shoe 17 moves about the pivot point 35. This means that when the housing 12 is removed, the slide shoe 17 first moves downward at the contact point 34 and only when the sealing ring 19 is lifted off the end plate of the safety cartridge 15 can the slide shoe slide out of the slide guide. The position of this fulcrum 35 in the sealing plane ensures that no tilting movement of the sealing ring 19 occurs due to the tilting of the housing 12.
  • FIG. 3 which shows a top view of the left housing half and thus of the housing part 10, shows that two sliding guides are arranged in the lower region of the housing part 10.
  • the sliding surfaces 21 are also shown, on which the lugs 20, which are not visible here, slide along until they engage in the recesses 22.
  • the spatial arrangement of the sliding guide 16 and the sliding surfaces 21 in the manner shown shows that when the housing 12 is installed, this housing is reliably spread apart by the lugs.
  • the housing part 10 is fastened to the mounting wall by means of the screws 36, 37, 38.
  • the two tabs 39, 40 can also be seen, to which resilient hook closures attack and cause the flange 12 to be securely flanged onto the housing part 10.
  • centering surfaces 41 there are two centering surfaces 41 on the upper side of the housing part 10.
  • a nose 42 attached to the handle 23 engages between these centering surfaces 41.
  • This nose 42 is shown in Figure 2 and Figure 1. This additional centering offers further security that the housing 12 is brought into the correct angular position with respect to the housing part 10.
  • the nose 42 in conjunction with the centering surfaces 41 is a means of visually checking the correct position of the parts relative to one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Description

Die Erfindung betrifft ein Ansaugluftfilter für Brennkraftmaschinen nach dem Oberbegriff des Anspruchs 1. Aus der US-PS 4 006 000 ist ein derartiger Luftfilter bekannt zur Ansaugluftfilterung mit einem im wesentlichen zylindrischen Gehäuse, welches einen Rohlufteinlaß aufweist, der tangential am Gehäuse angeordnet ist und wobei sich in diesem Gehäuse ein Filtereinsatz befindet, der radial durchströmt wird.The invention relates to an intake air filter for internal combustion engines according to the preamble of claim 1. From US-PS 4 006 000, such an air filter is known for intake air filtering with an essentially cylindrical housing which has a raw air inlet which is arranged tangentially on the housing and where a filter insert is located in this housing, which is flowed through radially.

Das Gehäuse selbst ist über einen Bajonettverschluß an einen zylinderförmigen Ansaugluftsammler anschließbar. In diesem Ansaugluftsammler befindet sich eine Sicherheitspatrone, die bei einem Wechsel des Filtereinsatzes ein Eindringen von Schmutz und Staub in den Ansaugluftstutzen vermeiden soll. Eine Abdichtung zwischen der Sicherheitspatrone und dem Filtereinsatz erfolgt dadurch, daß nach dem Einrasten des Bajonettverschlusses eine axiale Verschiebung des Filtereinsatzes in Richtung der Sicherheitspatrone erfolgt, durch welche die Stirnseite des Filtereinsatzes an der Stirnseite der Sicherheitspatrone zur Anlage kommt. Diese axiale Verschiebung wird mit einer an der Stirnwand des Gehäuses angeordneten Verstellschraube vorgenommen, die eine axiale Bewegung auf die Endscheibe des Filtereinsatzes ausübt. Ein Nachteil dieser bekannten Einrichtung besteht darin, daß zum Ein- und Ausbauen des Filtereinsatzes ein sehr großer Freiraum um das Gehäuse vorhanden sein muß. Zunächst muß, um den Bajonettverschluß zu lösen, eine gewisse axiale Beweglichkeit möglich sein. Zum anderen ist das erforderliche Drehen der Einstellschraube zum axialen Verschieben des Filtereinsatzes nur möglich, wenn im Bereich dieser Einstellschraube genügend Platz zur manuellen Bedienbarkeit vorgesehen ist. Diese Art von Aufbau des Ansaugluftfilters ist daher dort nicht geeignet, wo beengte Platzverhältnisse vorzufinden sind.The housing itself can be connected to a cylindrical intake air collector via a bayonet lock. There is a safety cartridge in this intake air collector, which should prevent dirt and dust from entering the intake air nozzle when changing the filter insert. A seal between the safety cartridge and the filter insert takes place in that, after the bayonet catch engages, there is an axial displacement of the filter insert in the direction of the safety cartridge, through which the end face of the filter insert comes into contact with the end face of the safety cartridge. This axial displacement is with a on the end wall of the Adjustment screw arranged housing, which exerts an axial movement on the end plate of the filter insert. A disadvantage of this known device is that there must be a very large amount of free space around the housing for installing and removing the filter insert. First of all, a certain axial mobility must be possible in order to release the bayonet catch. On the other hand, the required turning of the adjusting screw for axially displacing the filter insert is only possible if there is sufficient space in the area of this adjusting screw for manual operation. This type of construction of the intake air filter is therefore not suitable where there is limited space.

Der Erfindung liegt deshalb die Aufgabe zugrunde, ein Ansaugluftfilter für Brennkraftmaschinen zu schaffen, das auch unter beengten Platzverhältnissen in einfacher Weise ein Auswechseln des Filtereinsatzes ermöglicht.The invention is therefore based on the object of providing an intake air filter for internal combustion engines which enables the filter insert to be exchanged in a simple manner even in confined spaces.

Diese Aufgabe wird ausgehend von dem Oberbegriff des Hauptanspruchs durch dessen kennzeichnende Merkmale gelöst.This object is achieved on the basis of the preamble of the main claim by its characterizing features.

Ein wesentlicher Vorteil dieser Lösung ist darin zu sehen, daß eine axiale Bewegung des Gehäuses beim Ein- bzw. Ausbauen nicht erforderlich ist. Beim Anschließen des Gehäuses an ein entsprechendes Anlageteil wird das Gehäuse von oben her in eine Richtung, die im wesentlichen parallel zu der Dichtfläche an dem Anlageteil verläuft, eingeführt und zur Vermeidung einer Scherbewegung, die beim Einführen des Gehäuses auf das Dichtelement wirken könnte, dieses Gehäuse von dem Anlageteil unter einem geringfügigen Achsflucht-Winkel abgespreizt. Diese Abspreizung erfolgt bis zu der Position, an welcher sich das Dichtelement und die Dichtfläche konzentrisch gegenüberstehen.A major advantage of this solution is the fact that an axial movement of the housing is not necessary when installing or removing. When the housing is connected to a corresponding contact part, the housing is introduced from above in a direction that runs essentially parallel to the sealing surface on the contact part and, in order to avoid a shear movement that could act on the sealing element when inserting the housing, this housing spread from the system part at a slight axial alignment angle. This spreading takes place up to the position at which the sealing element and the sealing surface face each other concentrically.

In dieser Position ist ein Kippen des Gehäuses und anschließendes Anklammern an das Anlageteil möglich.In this position, the housing can be tilted and then clipped onto the system part.

Es hat sich gezeigt, daß diese Art des Einbaus ein sehr geringen zusätzlichen Freiraum um das Gehäuse herum beansprucht und damit die kompakte und platzsparende Bauweise bei Brennkraftmaschinen unterstützt.It has been shown that this type of installation takes up very little additional space around the housing and thus supports the compact and space-saving design in internal combustion engines.

Gemäß einer Weiterbildung der Erfindung ist ein topfförmiges Gehäuse vorgesehen, wobei die Rohluft radial eine Filterpatrone durchströmt. Diese Filterpatrone trägt an ihrer dem Anlageteil zugewandten ringförmigen Endscheibe das Dichtelement in Form eines Dichtringes. Diese ringförmige Endscheibe kann weiterhin noch mit Leitschaufeln versehen sein. Damit wird ein Axialzyklon gebildet, welches die Staubabscheidung verbessert.According to a development of the invention, a pot-shaped housing is provided, the unfiltered air flowing radially through a filter cartridge. This filter cartridge carries the sealing element in the form of a sealing ring on its annular end disk facing the system part. This annular end plate can also be provided with guide vanes. This creates an axial cyclone that improves dust separation.

Zur Führung der bei dem Ein- bzw. Ausbau erforderlichen Bewegung des Gehäusess sind an dem Anlageteil zwei Gleitführungen vorgesehen. Das Gehäuse weist zwei Gleitschuhe auf, die beim Einführen des Gehäuses in den Anschlußbereich des Anlageteils in den Gleitführungen entlanggeführt und in die entsprechende Position gebracht werden. Die Gleitführungen sind dabei so ausgebildet, daß die Gleitschuhe in der korrekten Position einen genau definierten Drehpunkt für das Gehäuse vorgeben, so daß ein Verkanten oder Verschieben des Gehäuses beim Anschließen an das Anlageteil nicht möglich ist.To guide the movement of the housing required during installation or removal, two sliding guides are provided on the system part. The housing has two sliding shoes which are guided along in the sliding guides when the housing is inserted into the connection region of the system part and brought into the corresponding position. The slide guides are designed so that the slide shoes in the correct position specify a precisely defined pivot point for the housing, so that tilting or moving the housing when connecting to the system part is not possible.

Eine besonders vorteilhafte Ausgestaltung der Erfindung besteht darin, daß am Gehäuse zwei Abstandshalter vorgesehen sind. Diese zwei Abstandshalter sind außerhalb des Dichtbereiches des Gehäuses angeordnet und stabilisieren die Einführungsbewegung des Gehäuses in die Anschlußposition. Wird die Distanz zwischen Abstandshalter und Gleitschuhen möglichst groß gewählt, dann besteht auch hier keine Gefahr einer undefinierten Kippbewegung. Das Gehäuse ist damit beim Ein- und Ausbauen in allen Richtungen zwangsgeführt, so daß weder ein unkorrektes Anschließen des Gehäuses an das Anlageteil noch ein Beschädigen des Dichtringes möglich ist.A particularly advantageous embodiment of the invention is that two spacers are provided on the housing. These two spacers are arranged outside the sealing area of the housing and stabilize the insertion movement of the housing into the connection position. If the distance between the spacer and sliding shoes is chosen as large as possible, then there is also no risk of an undefined tilting movement. The housing is thus positively guided in all directions during installation and removal, so that neither an incorrect connection of the housing to the system part nor damage to the sealing ring is possible.

Zur leichteren Handhabung ist in einer weiteren Ausgestaltung der Erfindung vorgesehen, an das Gehäuse einen Haltegriff anzuordnen. Dieser kann zur optischen Unterstützung der Positionierung des Gehäuses eine Zentriernase aufweisen, die zwischen Zentrierflächen eingefügt wird.For easier handling, a further embodiment of the invention provides for a handle to be arranged on the housing. For optical support of the positioning of the housing, this can have a centering lug which is inserted between centering surfaces.

Weiterbildungsgemäß ist in dem Anlageteil eine Sicherheitspatrone angeordnet. Diese Sicherheitspatrone verhindert das Eindringen von Staub bzw. Schmutz in den Reinluftbereich bei einem Wechsel der Filterpatrone. Die Endscheibe der Sicherheitspatrone bildet dabei vorteilhafterweise die Dichtfläche, an welcher der Dichtring der Filterpatrone angelegt wird.According to a further development, a safety cartridge is arranged in the system part. This safety cartridge prevents dust or dirt from entering the clean air area when changing the filter cartridge. The end plate of the safety cartridge advantageously forms the sealing surface on which the sealing ring of the filter cartridge is placed.

Ist eine Positionierung des Gehäuses nach dem Wechsel der Filterpatrone erfolgt, dann muß das Gehäuse an dem Anlageteil befestigt werden. Dies geschieht dadurch, daß die Gleitschuhe sich an der Gleitführung abstützen und damit gleichzeitig die Funktion einer Haltevorrichtung ausüben. Es ist daher ausreichend, wenn auf der den Gleitschuhen gegenüberliegenden Seite ein oder zwei Hakenverschlüsse angebracht sind, so daß damit drei bzw. vier Haltevorrichtungen am Umfang des Gehäuses gebildet werden.If the housing has been positioned after changing the filter cartridge, then the housing must be attached to the system part. This is done in that the sliding shoes are supported on the sliding guide and at the same time exercise the function of a holding device. It is therefore sufficient if one or two hook fasteners are attached to the side opposite the sliding shoes, so that three or four holding devices are formed on the circumference of the housing.

Aus dem DE-GM 16 65 873 ist beispielsweise ein Hakenverschluß in Verbindung mit einer Haltelasche bekannt. Bei dieser Anordnung besteht jedoch die Gefahr, daß die miteinander zu verbindenden Teile gegeneinander verdreht befestigt werden und damit die Verbindungselemente nicht mehr exakt zueinander liegen. Dies beeinträchtigt jedoch die Funktion dieser Verbindungselemente.From DE-GM 16 65 873, for example, a hook closure in connection with a retaining tab is known. With this arrangement, however, there is a risk that the together connecting parts are rotated against each other and thus the connecting elements are no longer exactly with each other. However, this affects the function of these connecting elements.

Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert. Es zeigt

  • Figur 1 die Prinzipskizze eines Ansaugluftfilters in der Einbauphase,
  • Figur 2 ein Ansaugluftfilter in der Einbaustellung,
  • Figur 3 eine Draufsicht auf die linke Gehäusehälfte des Ansaugluftfilters.
The invention is explained in more detail below using an exemplary embodiment. It shows
  • FIG. 1 shows the basic sketch of an intake air filter in the installation phase,
  • FIG. 2 shows an intake air filter in the installed position,
  • Figure 3 is a plan view of the left housing half of the intake air filter.

Das Ansaugluftfilter gemäß Figur 1 besteht im wesentlichen aus zwei Elementen. Ein Gehäuseteil bzw. Anlageteil 10 ist fest an einer Montagewand 11 angeordnet. An dieses Gehäuseteil 10 ist das Gehäuse 12, in welches eine austauschbare Filterpatrone 13 einsteckbar ist, befestigbar. Für das gesamte Ansaugluftfilter ist ein bestimmter Einbauraum vorgegeben, der durch die gestrichelt dargestellte Linie 43 begrenzt wird. Innerhalb des Gehäuseteils 10 befindet sich eine Sicherheitspatrone 15. Diese Sicherheitspatrone verhindert beim Austauschen der Filterpatrone 13 das Eindringen von Schmutz in die Ansaugluftseite. Sowohl das Gehäuseteil 10 als auch das Gehäuse 12 sind topfförmig ausgebildet.The intake air filter according to Figure 1 consists essentially of two elements. A housing part or system part 10 is fixedly arranged on a mounting wall 11. The housing 12, into which an exchangeable filter cartridge 13 can be inserted, can be fastened to this housing part 10. A specific installation space is specified for the entire intake air filter and is delimited by the line 43 shown in broken lines. A safety cartridge 15 is located within the housing part 10. This safety cartridge prevents dirt from penetrating into the intake air side when the filter cartridge 13 is replaced. Both the housing part 10 and the housing 12 are cup-shaped.

Die im nachfolgenden beschriebenen Teile, welche das Anfügen des Gehäuses 12 an das Gehäuseteil 10 unterstützen und absichern, sind außerhalb des äußeren Durchmessers des Topfes angeordnet und beeinträchtigen deshalb nicht die innerhalb des Topfes vorgesehenen Luftwege. Ein erstes Führungs- und Befestigungselement für das Gehäuse 12 ist eine Gleitführung 16. Diese Gleitführung 16 hat eine trichterförmige Form und ist unmittelbar mit dem Gehäuseteil 10 verbunden. Zweckmäßigerweise ist das Gehäuseteil 10 ein Kunststoffspritzgußteil, welches die Gleitführung mit einschließt. Das Gehäuse 12, welches ebenfalls ein Kunststoffspritzgußteil ist, ist mit einem Gleitschuh 17 versehen. Dieser Gleitschuh hat beim Einfügen des Gehäuses 12 an das Gehäuseteil 10 zunächst die Aufgabe, in Verbindung mit der Gleitführung 16 die Bewegung des Gehäuses 12 zu begrenzen und anschließend die Endlage, d. h. die endgültige Position, in welcher das Gehäuse 12 befestigt werden kann, vorzugeben. Außerdem dient dieser Gleitschuh als Befestigungselement, d. h. die axiale Sicherung des Gehäuses 12 im eingebauten Zustand wird durch den Gleitschuh übernommen.The parts described below, which support and secure the attachment of the housing 12 to the housing part 10, are outside the outer diameter of the pot arranged and therefore do not affect the airways provided within the pot. A first guide and fastening element for the housing 12 is a sliding guide 16. This sliding guide 16 has a funnel-shaped shape and is directly connected to the housing part 10. The housing part 10 is expediently a plastic injection molded part, which includes the sliding guide. The housing 12, which is also a plastic injection molded part, is provided with a sliding block 17. When inserting the housing 12 onto the housing part 10, this sliding shoe first has the task of limiting the movement of the housing 12 in connection with the sliding guide 16 and then prescribing the end position, ie the final position in which the housing 12 can be fastened. In addition, this slide shoe serves as a fastening element, ie the axial securing of the housing 12 in the installed state is carried out by the slide shoe.

Zwischen der Filterpatrone 13 und der Sicherheitspatrone 15 ist an deren gegenüberliegenden Stirnseiten eine Abdichtung vorzunehmen. Diese Abdichtung erfolgt mittels eines an der Endscheibe 18 der Filterpatrone 13 angeordneten Dichtringes 19. Beim Einsetzen des Gehäuses 12 an das Gehäuseteil 10 besteht die Gefahr, daß dieser Dichtring 19 an der Sicherheitspatrone oder an Stirnflächen von Wandungen des Gehäuseteils 10 entlangstreift und dabei eine Beschädigung oder Zerstörung des Dichtrings 19 durch Scherkräfte auftritt. Außerdem besteht die Gefahr, daß beim Aufbringen der Dichtungspressung der Dichtring selbst und die Dichtfläche unter Erzeugung von Abrieb seitlich gegeneinander verschoben werden. Auch dadurch kann der Dichtring beschädigt werden oder sich vom Filtereinsatz lösen.A seal must be made between the filter cartridge 13 and the security cartridge 15 on their opposite faces. This sealing takes place by means of a sealing ring 19 arranged on the end plate 18 of the filter cartridge 13. When the housing 12 is inserted into the housing part 10, there is a risk that this sealing ring 19 will graze along the safety cartridge or on end faces of walls of the housing part 10 and thereby damage or Destruction of the sealing ring 19 occurs due to shear forces. There is also the risk that when the sealing pressure is applied, the sealing ring itself and the sealing surface are laterally displaced with respect to one another, producing abrasion. This can also damage the sealing ring or detach it from the filter insert.

Um einen Kontakt des Dichtringes 19 mit irgendwelchen Teilen während der Einbauphase zu vermeiden, trägt das Gehäuse 12 einen Abstandshalter in Form einer Nase 20. Diese Nase stützt sich auf einer Gleitfläche bzw. Stützfläche 21 ab und bewirkt damit eine Abspreizung des Gehäuses 12 von dem Gehäuseteil 10. Erst wenn das Gehäuse 12 sich in seiner richtigen Position, d. h. in der Einbaulage befindet, können beide Teile zusammengefügt werden. Hierzu ist an dem Gehäuseteil 10 eine Ausnehmung 22 vorgesehen, in welche die Nase 20 eintaucht und damit ein Aufeinandertreffen der Dichtflächen ermöglicht. Zur Handhabung des Gehäuses 12 ist ein Griff 23 vorgesehen. Im Bereich dieses Griffes befinden sich zwei Hakenverschlüsse, mit welchen das Gehäuse 12 an dem Gehäuseteil 10 befestigt wird.In order to avoid contact of the sealing ring 19 with any parts during the installation phase, the housing 12 carries a spacer in the form of a nose 20. This nose supports abuts on a sliding surface or support surface 21 and thus causes the housing 12 to spread apart from the housing part 10. Only when the housing 12 is in its correct position, ie in the installed position, can both parts be joined together. For this purpose, a recess 22 is provided on the housing part 10, into which the nose 20 dips and thus enables the sealing surfaces to meet. A handle 23 is provided for handling the housing 12. In the area of this handle there are two hook closures with which the housing 12 is fastened to the housing part 10.

Eine detailliertere Darstellung des gesamten Ansaugluftfilters zeigt Figur 2. In dieser Zeichnung ist das Gehäuse 12 im eingebauten Zustand gezeigt. Diese Figur zeigt außerdem den Strömungsverlauf der Ansaugluft. Diese wird über den Ansaugluftstutzen 24 einer ringförmigen Kammer 25 in dem Gehäuseteil 10 zugeführt. Von dieser ringförmigen Kammer aus strömt die Ansaugluft durch Leitschaufeln 26 in einen Rohluftraum 27. Aufgrund des durch die Leitschaufeln entstehenden Dralls findet in diesem Raum eine Grobstaubabscheidung statt. Der Staub kann durch die Entnahmeöffnung 28 abgeführt werden. Die Ansaugluft durchströmt die Filterpatrone 13 in radialer Richtung von außen nach innen und anschließend die Sicherheitspatrone 15 von innen nach außen und gelangt über eine ringförmige Kammer 29 zu der Ausgangsseite des Filters mit dem Anschlußstutzen 30.FIG. 2 shows a more detailed illustration of the entire intake air filter. In this drawing, the housing 12 is shown in the installed state. This figure also shows the flow pattern of the intake air. This is fed via the intake air nozzle 24 to an annular chamber 25 in the housing part 10. From this annular chamber, the intake air flows through guide vanes 26 into an unfiltered air space 27. Because of the swirl generated by the guide vanes, coarse dust separation takes place in this room. The dust can be removed through the removal opening 28. The intake air flows through the filter cartridge 13 in the radial direction from the outside inwards and then the safety cartridge 15 from the inside outwards and reaches the outlet side of the filter with the connecting piece 30 via an annular chamber 29.

Die Sicherheitspatrone 15 ist über ihre Endscheibe 31 an der Zwischenwand 32 des Gehäuseteils 10 verschraubt. Diese Endscheibe 31 trägt ferner einen Dichtring 33. Damit wird ein zuverlässiges Abdichten der Reinluftseite auch bei abgenommenem Gehäuse 12 gewährleistet. Wie in dieser Figur gezeigt, liegt der Gleitschuh 17 an der Kontaktstelle 34 an der Gleitführung 16 an. Damit ist im eingebauten Zustand gewährleistet, daß ein sicheres und wirksames Anschließen des Gehäuses 12 an das Gehäuseteil 10 im Bereich der Gleitführungen erfolgt. Wesentlich ist hierbei auch, daß beim Abnehmen oder Anbringen des Gehäuses 12 sich der Gleitschuh 17 um den Drehpunkt 35 bewegt. Dies bedeutet, daß beim Abnehmen des Gehäuses 12 zunächst der Gleitschuh 17 sich an der Kontaktstelle 34 nach unten bewegt und erst wenn der Dichtring 19 von der Endscheibe der Sicherheitspatrone 15 abgehoben ist, ein Herausgleiten des Gleitschuhs aus der Gleitführung möglich ist. Durch die Lage dieses Drehpunkts 35 in der Dichtebene wird gewährleistet, daß durch das Kippen des Gehäuses 12 keine Scherbewegung auf den Dichtring 19 erfolgt.The safety cartridge 15 is screwed via its end plate 31 to the intermediate wall 32 of the housing part 10. This end plate 31 also carries a sealing ring 33. This ensures reliable sealing of the clean air side even when the housing 12 is removed. As shown in this figure, the slide shoe 17 lies at the contact point 34 on the slide guide 16 on. This ensures in the installed state that a secure and effective connection of the housing 12 to the housing part 10 takes place in the region of the sliding guides. It is also essential here that when the housing 12 is removed or attached, the slide shoe 17 moves about the pivot point 35. This means that when the housing 12 is removed, the slide shoe 17 first moves downward at the contact point 34 and only when the sealing ring 19 is lifted off the end plate of the safety cartridge 15 can the slide shoe slide out of the slide guide. The position of this fulcrum 35 in the sealing plane ensures that no tilting movement of the sealing ring 19 occurs due to the tilting of the housing 12.

Wie schon erwähnt, ist es vorteilhaft, zwei Gleitführungen und zwei Abstandselemente vorzusehen, so daß beim Anfügen des Gehäuses 12 an das Gehäuseteil 10 eine bessere Führung gewährleistet ist.As already mentioned, it is advantageous to provide two sliding guides and two spacer elements, so that better guidance is ensured when the housing 12 is attached to the housing part 10.

Die Figur 3, welche eine Draufsicht auf die linke Gehäusehälfte und damit auf das Gehäuseteil 10 zeigt, macht erkenntlich, daß zwei Gleitführungen im unteren Bereich des Gehäuseteils 10 angeordnet sind. Es sind weiterhin die Gleitflächen 21 dargestellt, auf denen die Nasen 20, die hier nicht sichtbar sind, entlang gleiten, bis sie in die Ausnehmungen 22 eingreifen. Die räumliche Anordnung der Gleitführung 16 und der Gleitflächen 21 in der dargestellten Weise zeigt, daß beim Einbau des Gehäuses 12 ein sicheres Abspreizen dieses Gehäuses durch die Nasen gewährleistet ist.FIG. 3, which shows a top view of the left housing half and thus of the housing part 10, shows that two sliding guides are arranged in the lower region of the housing part 10. The sliding surfaces 21 are also shown, on which the lugs 20, which are not visible here, slide along until they engage in the recesses 22. The spatial arrangement of the sliding guide 16 and the sliding surfaces 21 in the manner shown shows that when the housing 12 is installed, this housing is reliably spread apart by the lugs.

Das Gehäuseteil 10 ist mittels der Schrauben 36, 37, 38 an der Montagewand befestigt. In dieser Figur sind auch die beiden Laschen 39, 40 zu erkennen, an welche federnde Hakenverschlüsse angreifen und das sichere Anflanschen des Gehäuses 12 an das Gehäuseteil 10 bewirken.The housing part 10 is fastened to the mounting wall by means of the screws 36, 37, 38. In this figure, the two tabs 39, 40 can also be seen, to which resilient hook closures attack and cause the flange 12 to be securely flanged onto the housing part 10.

Auf der Oberseite des Gehäuseteils 10 befinden sich zwei Zentrierflächen 41. Zwischen diese Zentrierflächen 41 greift eine an dem Griff 23 angebrachte Nase 42 ein. Diese Nase 42 ist in Figur 2 und Figur 1 dargestellt. Diese zusätzliche Zentrierung bietet eine weitere Sicherheit dafür, daß das Gehäuse 12 in die richtige Winkellage zu dem Gehäuseteil 10 gebracht wird. Gleichzeitig ist die Nase 42 in Verbindung mit den Zentrierflächen 41 ein Mittel zur visuellen Kontrolle der richtigen Lage der Teile zueinander.There are two centering surfaces 41 on the upper side of the housing part 10. A nose 42 attached to the handle 23 engages between these centering surfaces 41. This nose 42 is shown in Figure 2 and Figure 1. This additional centering offers further security that the housing 12 is brought into the correct angular position with respect to the housing part 10. At the same time, the nose 42 in conjunction with the centering surfaces 41 is a means of visually checking the correct position of the parts relative to one another.

Claims (9)

1. Intake air filter for internal combustion engines, including a filter insert (13), which is disposed in a housing (12), the housing being provided with an unfiltered air inlet and an opening for the introduction of the filter insert, and the filter insert being provided with a sealing face parallel to the plane of the opening, which sealing face is abuttable against a sealing face disposed on a bearing member (10) through the intermediary of a sealing element (19), and retaining means are provided for securing the housing on the bearing member, characterised in that, in order to position the housing (12) on the bearing member (10), at least one slidable guide means (16) is provided on the bearing member (10), and at least one slidable shoe (17) is provided, which co-operates with the slidable guide means (16) and is disposed on the housing (12), and in that the housing (12) is provided with a spacer member (20), which is orientated towards the bearing member (10) and is supported on a supporting face (21), which is disposed on the bearing member (10), and a recess (22) is provided in the bearing member (10) for the spacer member (20), which recess accommodates the spacer member (20) when the two sealing faces are correctly positioned relative to each other, and which recess permits the two sealing faces to be sealed relative to each other by means of the sealing element (19).
2. Intake air filter according to claim 1, characterised in that the housing (12) has a cup-shaped configuration, and the filter insert is a filter cartridge (13), which has unfiltered air flowing over the peripheral area, the filtered air emerging in the interior of the filter cartridge (13), and the sealing element, in the form of a sealing ring (19), being disposed on the end face of the filter cartridge (13) facing the bearing member (10).
3. Intake air filter according to claim 2, characterised in that at least two slidable guide means (16) and at least two slidable shoes (17) are disposed, externally of the sealing region, on the bearing member (10) and on the housing (12) respectively in such a manner that the guide means extend parallel to the sliding direction.
4. Intake air filter according to claim 3, characterised in that two spacer members (20) are provided on the housing (12), and two supporting faces (21) and recesses (22) are provided on the bearing member (10), these component parts being situated externally of the sealing region of the housing (12) and at as large a spacing as possible from the slidable shoes (17).
5. Intake air filter according to one of the preceding claims, characterised in that a handle (23) is provided on the housing, and a centering projection member (42) is disposed in the region of the handle (23), which projection member co-operates with centering faces (41) on the bearing member (10) and assists in the mounting of the housing (12) at the correct location on the bearing member (10).
6. Intake air filter according to one of the preceding claims, characterised in that a safety cartridge (15) is disposed in the bearing member (10), the sealing face at the abutment end being formed by the annular end plate (31) of the safety cartridge (15).
7. Intake air filter according to one of the preceding claims, characterised in that the end plate (18) of the filter cartridge (13) is provided with guide vanes (26) for the formation of cyclone flow.
8. Intake air filter according to one of the preceding claims, characterised in that, in the position in which the correct location of the two sealing faces (19, 31) relative to each other is reached, the slidable shoe (17) is supported on the slidable guide means (16) in such a manner that such support simultaneously assumes the function of securing the housing (12) on the bearing member (10) in the region of this slidable guide means (16).
9. Intake air filter according to claim 7, characterised in that at least one additional securing means is provided, which is in the form of a resilient hook-type closure.
EP90104168A 1989-06-06 1990-03-03 Intake air filter for combustion engines Expired - Lifetime EP0401471B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90104168T ATE74404T1 (en) 1989-06-06 1990-03-03 AIR INTAKE FILTER FOR COMBUSTION ENGINES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3918347A DE3918347A1 (en) 1989-06-06 1989-06-06 INTAKE AIR FILTER FOR INTERNAL COMBUSTION ENGINES
DE3918347 1989-06-06

Publications (2)

Publication Number Publication Date
EP0401471A1 EP0401471A1 (en) 1990-12-12
EP0401471B1 true EP0401471B1 (en) 1992-04-01

Family

ID=6382128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90104168A Expired - Lifetime EP0401471B1 (en) 1989-06-06 1990-03-03 Intake air filter for combustion engines

Country Status (7)

Country Link
US (1) US5042999A (en)
EP (1) EP0401471B1 (en)
AR (1) AR240505A1 (en)
AT (1) ATE74404T1 (en)
BR (1) BR9002445A (en)
DE (2) DE3918347A1 (en)
ES (1) ES2031715T3 (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8902441L (en) * 1989-07-05 1991-01-06 Volvo Ab FILTERING DEVICE, IN PARTICULAR SUCTION FILTER FOR COMBUSTION ENGINES
DE4034216C1 (en) * 1990-10-27 1992-06-17 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg, De
US5487767A (en) * 1993-09-30 1996-01-30 Dana Corporation Radially sealed air filters
DE19644647A1 (en) * 1996-10-26 1998-04-30 Mann & Hummel Filter Liq. filter, esp. an oil filter
US6187073B1 (en) * 1999-03-17 2001-02-13 Donaldson Company, Inc. Air cleaner; aerosol separator; and method
US6676721B1 (en) * 2000-06-02 2004-01-13 Donaldson Company, Inc. Multistage air cleaner including pulse cleaning system
DE10036593A1 (en) * 2000-07-27 2002-02-07 Mann & Hummel Filter Air filter, in particular for the intake air of an internal combustion engine
ATE531440T1 (en) * 2005-03-31 2011-11-15 Donaldson Co Inc AIR PURIFIER ARRANGEMENT
DE202005009989U1 (en) * 2005-06-25 2006-11-02 Mann + Hummel Gmbh Filter with a filter housing
WO2007149388A2 (en) 2006-06-19 2007-12-27 Donaldson Company, Inc. Air cleaner with pulse jet reverse cleaning
WO2009106592A2 (en) * 2008-02-26 2009-09-03 Mann+Hummel Gmbh Filter element comprising an optimised bellow-type arrangement
US8317890B2 (en) 2008-08-29 2012-11-27 Donaldson Company, Inc. Filter assembly; components therefor; and, methods
DE202009001693U1 (en) * 2009-02-11 2010-08-19 Mann+Hummel Gmbh Air filter of an internal combustion engine
US9186612B2 (en) 2010-01-22 2015-11-17 Donaldson Company, Inc. Pulse jet air cleaner systems; evacuation valve arrangements; air cleaner components; and, methods
US9909543B2 (en) 2015-11-19 2018-03-06 Cnh Industrial America Llc Air intake system for a work vehicle with enhanced pre-cleaner serviceability
DE102016001134A1 (en) * 2016-02-03 2017-08-03 Mann + Hummel Gmbh Filter housing and filter
DE102018117995A1 (en) * 2018-07-25 2020-01-30 Mann+Hummel Gmbh Filter insert for interchangeable installation in a filter housing of a filter for fluid and filter
CN114294134B (en) * 2022-03-11 2022-05-13 氢山(北京)氢内燃机技术研究院有限公司 Air intake system for hydrogen internal combustion engine of vehicle

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1875427A (en) * 1932-09-06 Aib cleaneb
DE1665873U (en) * 1953-02-18 1953-10-29 Mann & Hummel Filter RELEASE CONNECTION FOR THE HOUSING PARTS OF AIR FILTERS AND SUCTION NOISE DAMPERS.
US3048959A (en) * 1959-10-27 1962-08-14 Novo Ind Corp Air cleaning device and method
US3319404A (en) * 1965-04-21 1967-05-16 Novo Ind Corp Dust unloader
US3385034A (en) * 1966-02-17 1968-05-28 Farr Co Two-stage filter housing and seal arrangement
DE1665873C3 (en) * 1966-02-23 1978-04-06 A. Salvi & C. S.P.A., Mailand (Italien) Spacers for high voltage overhead lines
US3429108A (en) * 1967-03-03 1969-02-25 Donaldson Co Inc Automatic-unloading dust valve for centrifugal air cleaners
US3423909A (en) * 1967-09-28 1969-01-28 Novo Ind Corp Air cleaner with improved filter element assembly
US3508383A (en) * 1968-02-15 1970-04-28 Wix Corp Air filter
US3442067A (en) * 1968-02-26 1969-05-06 Deere & Co Air cleaner
US3672130A (en) * 1970-04-02 1972-06-27 Donaldson Co Inc Retention means for air cleaner element
US4006000A (en) * 1974-06-06 1977-02-01 United Filtration Corporation All dry air cleaner
US4197101A (en) * 1978-02-27 1980-04-08 Fram Corporation Air cleaner
JPS608469A (en) * 1983-06-27 1985-01-17 Nippon Denso Co Ltd Method of correctively controlling ignition timing advance in transient state of internal-combustion engine

Also Published As

Publication number Publication date
ATE74404T1 (en) 1992-04-15
DE59000075D1 (en) 1992-05-07
ES2031715T3 (en) 1992-12-16
DE3918347A1 (en) 1990-12-13
EP0401471A1 (en) 1990-12-12
DE3918347C2 (en) 1992-01-23
BR9002445A (en) 1991-08-06
AR240505A1 (en) 1990-04-30
US5042999A (en) 1991-08-27

Similar Documents

Publication Publication Date Title
EP0401471B1 (en) Intake air filter for combustion engines
EP1140320B1 (en) Fluid filter with a central component which can be assembled
EP2054133B1 (en) Liquid filter, particularly for motor vehicles
DE60003078T2 (en) VALVE WITH A POSITIVE LOCKING MECHANISM FOR A FUEL FILTER
EP1015751B1 (en) Air filter
EP0483629B1 (en) Intake air filter for combustion engines
EP1748830B9 (en) Apparatus for filtering liquids
EP0959978B1 (en) Filter
EP1154831B1 (en) Fluid filter with removable central component with additional retainer
EP0920581B1 (en) Filter with housing
EP1951398B1 (en) Oil filter arrangement
EP0176828B1 (en) Oil-sealed vacuum pump
DE102015005136B4 (en) Filter device and filter element
DE102010016497A1 (en) Fuel filter with pre and main filter
EP3352876A1 (en) Filter device with coupling element
EP2113650B1 (en) Air filter housing with pivoting hood
DE10216466B4 (en) Filter device for filtering fluids
EP0579141A1 (en) Automatic mountable plug-coupling for hose pipes in motor vehicles
EP3718128B1 (en) Device for coating containers, comprising at least one valve block
DE202005010059U1 (en) Insert for a variety of filters uses a security plate to secure the position of the head piece of a filter cartridge in a plug-in opening in a base plate
DE19643751A1 (en) Measuring device
EP4088801B1 (en) Filter device
EP0320610A1 (en) Locking belt for the flanges of a divisible air filter case
WO2023078787A1 (en) Filter element, filter housing part, filter system, and use of a filter element in a filter system
DE3028485A1 (en) Isolating gate valve with ceramic slide - has ceramic seat in form of orifice plate with metallic backing plate

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR GB IT SE

17P Request for examination filed

Effective date: 19901231

17Q First examination report despatched

Effective date: 19910612

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE ES FR GB IT SE

REF Corresponds to:

Ref document number: 74404

Country of ref document: AT

Date of ref document: 19920415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59000075

Country of ref document: DE

Date of ref document: 19920507

ITF It: translation for a ep patent filed

Owner name: BARZANO' E ZANARDO ROMA S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2031715

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
EAL Se: european patent in force in sweden

Ref document number: 90104168.1

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980213

Year of fee payment: 9

Ref country code: FR

Payment date: 19980213

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19980219

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980221

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19980223

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19980316

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990303

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990303

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990304

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19990304

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19990303

EUG Se: european patent has lapsed

Ref document number: 90104168.1

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991130

EUG Se: european patent has lapsed

Ref document number: 90104168.1

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000101

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20010503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050303