WO2008110153A1 - Palier à roulement, notamment palier à roulement à billes - Google Patents

Palier à roulement, notamment palier à roulement à billes Download PDF

Info

Publication number
WO2008110153A1
WO2008110153A1 PCT/DE2008/000415 DE2008000415W WO2008110153A1 WO 2008110153 A1 WO2008110153 A1 WO 2008110153A1 DE 2008000415 W DE2008000415 W DE 2008000415W WO 2008110153 A1 WO2008110153 A1 WO 2008110153A1
Authority
WO
WIPO (PCT)
Prior art keywords
rolling
bearing
rolling bearing
axis
indicative
Prior art date
Application number
PCT/DE2008/000415
Other languages
German (de)
English (en)
Inventor
Ralf Stopp
Original Assignee
Schaeffler Kg
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 Schaeffler Kg filed Critical Schaeffler Kg
Publication of WO2008110153A1 publication Critical patent/WO2008110153A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/34—Rollers; Needles
    • F16C33/36—Rollers; Needles with bearing-surfaces other than cylindrical, e.g. tapered; with grooves in the bearing surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
    • F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • F16C19/522—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to load on the bearing, e.g. bearings with load sensors or means to protect the bearing against overload
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles

Definitions

  • Rolling bearings in particular ball roller bearings
  • the invention relates to a roller bearing with an outer ring, an inner ring, rolling elements which are accommodated in a defined between the inner ring and the outer ring track space, and a cage device for guiding the rolling elements, wherein at least one of the rolling elements a first end side and a second end face, and has a between these end faces extending spherical, in particular spherical and concentric to a rolling element axis rolling body tread.
  • the invention has for its object to provide a rolling bearing of the type mentioned by the shoring in a bearing assembly on the realization of a viable bearing point beyond additional benefits can be achieved.
  • This object is achieved by a rolling bearing with: an outer ring, an inner ring,
  • Rolling elements which are accommodated in a defined between the inner ring and the outer ring track space, and a cage means for guiding the rolling elements, wherein at least one of the rolling elements has a first end face and a second end face, as well as a between these end faces spherical and concentric to a rolling element axis WälzSystemterrorism description , wherein this rolling bearing is characterized in that a detection device is provided for generating a signal indicative of the orientation of the rolling body relative to the bearing axis.
  • the rolling bearing is designed as a ball roller bearing.
  • These ball rollers are preferably guided in the region of their end faces on the cage device.
  • the cage device may be designed such that the rolling elements are guided without play under a slight bias.
  • the rolling elements as ball rollers, it is also possible to design them as barrel rolling bodies, ie as rolling elements whose diameter in a rolling section passing through the rolling element center is smaller than the radius of curvature of the running surface in an axial section plane containing the bearing axis.
  • the detection device is preferably designed in such a way that it comprises sensor elements for ascertaining the signals indicative of the orientation of the rolling body axis on the basis of electromagnetic interaction effects.
  • corresponding sensor elements can be realized in particular by coil arrangements.
  • the signal indicative of the inclination of the rolling body axis can be generated on the basis of a field or flux weakening effect, which as such correlates with the size of an air gap changed by tilting of the corresponding rolling body.
  • This air gap can be provided in particular directly between the end faces of the rolling elements and the sensor organs facing them. It is also possible to generate the air gap in interaction with a finger element, which forms part of the cage device and slightly rests resiliently against an end face of the associated rolling element.
  • the detection device can also be designed in such a way that the signals which are indicative of the orientation of the rolling elements are generated on the basis of field-electrical, optical and / or acoustic interaction effects by the sensor elements incorporated therein.
  • an evaluation circuit which is preferably designed as an ASIC element, is integrated directly into the rolling bearing device, by means of which a preliminary evaluation and preprocessing of the measurement signals collected by the sensor elements takes place already in the area of the rolling bearing.
  • this evaluation circuit it is also possible to realize a safety structure by means of which an unduly high voltage application of the sensor elements is avoided.
  • the detection device is at least partially integrated into a roller bearing seal covering the end face of the track.
  • the curvature of the defined by the outer ring and the inner ring track is tuned to the tread curvature of the rolling elements, that within the range of forces to be detected results in a sufficiently significant tilting of WälzSystemachsen.
  • the raceways are designed in such a way that the Schmiegungsver conception- seen achieved in conjunction with the rolling elements running thereon in the range of 100.6 to 104%.
  • the rolling bearing according to the invention can in particular form part of a vehicle wheel suspension, which makes it possible to obtain indicative signals with regard to the wheel load, in particular the orientation of the wheel guiding forces. These signals can be processed in particular in conjunction with an ABS or an ESP system to optimize the driving behavior of the vehicle.
  • the rolling bearing according to the invention can in particular also form part of a transmission gear, in particular a gearbox, and in this case be used to generate signals which as such provide information about the load case to be carried by the bearing device.
  • the inventively equipped with a sensor device for detecting a correlated with the tilting of the rolling elements sensor signal bearings can be used in particular within transmissions to determine the transmission load.
  • a sensor device for detecting a correlated with the tilting of the rolling elements sensor signal bearings can be used in particular within transmissions to determine the transmission load.
  • the bearing according to the invention can furthermore be used, in particular, also for determining maintenance intervals as well as for mathematical modeling and estimation of bearing and / or lubricant fatigue.
  • the sensor device can be designed such that signals for determining the bearing speed are provided in addition to the determination of the bearing load.
  • FIG. 1 shows a perspective sketch to illustrate the structure of a rolling bearing according to the invention, designed here as a ball roller bearing, FIG.
  • FIG. 2 shows an axial sectional representation for explaining further details of the concept underlying the force detection according to the invention
  • FIG. 3 shows a construction diagram for illustrating a detection device according to the invention for detecting the orientation of the roller body axis with respect to the bearing axis
  • FIG. 4 shows a schematic view for illustrating the arrangement of a plurality of sensor elements, which are in the circumferential direction, on the rolling bearing according to the invention
  • Figure 5 is a schematic diagram illustrating the use of the rolling bearing of the invention in a motor vehicle.
  • the rolling bearing shown in Figure 1 comprises an outer ring 1, an inner ring 2 and rolling elements 3, which are received in a defined between the inner ring 2 and the outer ring 1 track space B.
  • the rolling bearing further comprises a cage device 4 (not shown here) (see FIG. 3), which serves as guide for the rolling elements 3.
  • at least one of the rolling elements 3 are designed as ball rollers, which have a first end face 3a and a, not visible in this illustration, second end face 3b.
  • Each of the rolling bodies 3 furthermore has a crowned, preferably spherical rolling body running surface 3c extending between these two end faces 3a and 3b and concentric with a rolling body axis Y.
  • the rolling bearing shown here is characterized in that in this a detection device 5 (see Figure 3) is involved for generating a with respect to the spatial position or orientation of the rolling element axis Y relative to the bearing axis X indicative signal.
  • the detection device can be designed such that the pressure angle D of a bearing force F acting on the roller bearing as well as the angular position A of a plane E defined by the line of action of the bearing force F and the bearing axis X relative to a reference plane R can be determined.
  • the spatial position of the roller body axis Y of the roller bodies 3 accommodated between the outer ring 1 and the inner ring 2 changes depending on the bearing forces acting on the roller bearing.
  • a typical change angle of the rolling body Y is shown as indicated.
  • this change angle is typically in the range of approximately +/- five to +/- 10 degrees. At extremely high bearing forces, this angle can be within a range of +/- 30 °.
  • the extent of correlating with a change in the bearing load change in the inclination of the rolling element Y relative to the bearing axis X can be tuned by tuning the realized in conjunction with the rolling elements on the defined by the outer ring or inner race tracks osculation.
  • FIG. 3 shows a particularly preferred embodiment of a roller bearing according to the invention.
  • the detection device comprises a coil arrangement, by means of which indicative signals can be obtained with regard to the width of air gaps S1, S2.
  • These air gaps S1, S2 are formed in this exemplary embodiment by fingers 7 seated on the roller body 3 on its end faces 3a and 3b, respectively. These fingers 7 are designed as bending-forming sections of the cage device 4 and are slightly resilient on the end faces 3a and 3b of the rolling element 3 at.
  • the air gaps S1, S2 change.
  • a permanent magnet 8 is incorporated in the rolling elements 3.
  • the voltages U1, U2 induced by the fingers 7 in the coil arrangements 9, 10 thus vary.
  • the angle of inclination W of the rolling body Y with respect to the La gerachse X can be represented as such as a function of the ratio of the voltage values U1, U2.
  • Each rolling bearing can preferably be calibrated via an integrated ASIC circuit in such a way that tolerances caused during assembly and by the individual circuit components are internally compensated. Possible non-linear relationships between the measuring signals and the forces acting on the bearing can be taken into account and compensated by compensation circuits.
  • a plurality of the sensor fingers 7 shown here are integrated in the cage device. It is possible to detect the inclination of each rolling element 3 of the rolling bearing by such fingers.
  • the coil devices provided for detecting the voltage levels U1, U2 or other sensor devices indicative of the inclination of the rolling body axis Y are preferably, as shown in FIG. 4, arranged circumferentially at several points of the rolling bearing. This makes it possible, based on a summary evaluation of each measured measurement signals U1, U2, UV, U 2 'and U1 ", U2" to make a precise detection of the bearing load.
  • the rolling bearing according to the invention can be used in particular for detecting the loads of the individual wheels of a motor vehicle.
  • FIG. 5 schematically shows a motor vehicle.
  • R1, R2, R3 and R4 inventively designed bearings are arranged.
  • R1, R2, R3 and R4 By means of these rolling bearings, it becomes possible to detect at least the spatial orientation of the forces acting on the respective wheels. Based on this information, it is possible to determine the current driving state and to optimize the vehicle guidance as part of an anti-lock braking process or an ESP process.
  • measurement signals for vehicle body acceleration a as well as on the basis of measurement data which as such give information about the vehicle mass m, further information for the load of the respective vehicle wheel can be generated.
  • the ball roller bearing realized according to the invention has the property that its rolling elements tend to vary in magnitude over the circumference, depending on the load case. Where the roles tend to strongly depends on the bearing load, in particular on the resulting force vector on the bearing.
  • the inventively embedded in the rolling bearing sensor it is possible to detect the inclination of the rolling elements and to determine the load case. This can be used in the KFT transmission, e.g. determine the moments or, as previously described, in a suspension of the driving condition of the vehicle.
  • the sensor device according to the invention can in particular be incorporated into a sealing lip device, which as such serves to cover the web space of the rolling bearing. In this sealing lip device all cable elements can be sufficiently sealed involved, in particular vulcanized.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

L'invention concerne un palier à roulement comportant une bague extérieure (1), une bague intérieure (2), des corps de roulement logés dans un espace de trajectoire défini entre la bague intérieure et la bague extérieure, et un dispositif de cage (4) destiné à guider les corps de roulement, au moins un corps de roulement présentant un premier côté frontal (3a), un deuxième côté frontal (3b), et une surface de roulement de corps de roulement bombée (3c), s'étendant entre ces côtés frontaux, concentrique par rapport à un axe de corps de roulement (4). L'invention vise à mettre en oeuvre un palier à roulement de ce type, dont le montage dans un dispositif de palier permet d'obtenir une utilité supplémentaire s'étendant au-delà de la réalisation d'un point de palier porteur. A cet effet, ledit palier à roulement contient un dispositif de détection destiné à produire un signal caractéristique de l'orientation de l'axe de corps de roulement par rapport à l'axe de palier. De manière avantageuse, ceci permet de détecter l'orientation spatiale de la force d'appui agissant sur le palier à roulement. La détection de l'orientation spatiale de la force d'appui permet, par exemple, en cas de montage dudit palier à roulement dans une suspension de roue, d'obtenir des informations caractéristiques de la contrainte exercée sur la roue, et donc de l'état dynamique du véhicule.
PCT/DE2008/000415 2007-03-10 2008-03-07 Palier à roulement, notamment palier à roulement à billes WO2008110153A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007011718A DE102007011718A1 (de) 2007-03-10 2007-03-10 Wälzlager, insbesondere Kugelrollenlager
DE102007011718.5 2007-03-10

Publications (1)

Publication Number Publication Date
WO2008110153A1 true WO2008110153A1 (fr) 2008-09-18

Family

ID=39473272

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2008/000415 WO2008110153A1 (fr) 2007-03-10 2008-03-07 Palier à roulement, notamment palier à roulement à billes

Country Status (2)

Country Link
DE (1) DE102007011718A1 (fr)
WO (1) WO2008110153A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112654797A (zh) * 2018-12-28 2021-04-13 舍弗勒技术股份两合公司 用于轴承可动部件的空间运动的参数采集及跟踪***、用于轴承可动部件的空间运动的参数采集及跟踪方法及轴承

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012200780A1 (de) * 2012-01-20 2013-07-25 Aktiebolaget Skf Wälzkörper, Wälzkörperkäfig und Verfahren
JP2018132098A (ja) * 2017-02-14 2018-08-23 株式会社ジェイテクト ころ軸受用の状態検出装置、及び、ころ軸受装置
DE102017112028B3 (de) * 2017-06-01 2018-10-11 Schaeffler Technologies AG & Co. KG Verfahren zum Überwachen eines Lagers, Lager und Lageranordnung
DE102017128800A1 (de) * 2017-12-05 2019-06-06 Schaeffler Technologies AG & Co. KG Rollenlager
DE102018100411A1 (de) * 2018-01-10 2019-07-11 Schaeffler Technologies AG & Co. KG Abgedichtetes Schräg-Tonnenrollenlager

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1766440A (en) * 1924-12-17 1930-06-24 Leon Karl Oskar Antifriction bearing
EP0395783A1 (fr) * 1989-05-05 1990-11-07 Gmn Georg Müller Nürnberg Ag Palier à capteur pour mesurer la vitesse de rotation et/ou l'angle de rotation
EP0530093A1 (fr) * 1991-08-26 1993-03-03 Snr Roulements Capteurs linéaires de faibles déplacements à circuits magnétiques et roulements à billes équipés de tels capteurs
EP0947724A2 (fr) * 1998-04-02 1999-10-06 Robert Bosch Gmbh Dispositif de frein de roue électromécanique
FR2857743A1 (fr) * 2003-07-15 2005-01-21 Skf Ab Systeme de mesure de rotation
WO2006100887A1 (fr) * 2005-03-22 2006-09-28 Ntn Corporation Roulement de roue avec capteur

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1169210B (de) * 1955-08-05 1964-04-30 Frantisek Bohacek Kugellager fuer hohe Drehzahlen
US3620585A (en) * 1970-01-16 1971-11-16 Nasa High-speed rolling element bearing
GB1369501A (en) * 1971-01-05 1974-10-09 Secr Defence Rolling element bearings
SE501814C2 (sv) * 1993-08-06 1995-05-22 Skf Ab Anordning för lastmätning i rullningslager
DE19503468C1 (de) * 1995-02-03 1996-05-30 Freudenberg Carl Fa Dichtungsanordnung
DE10057861A1 (de) * 2000-11-21 2002-05-23 Mkl Miniaturkugellager Gmbh Kugellager und Kugellagereinheit
DE112004001197T5 (de) * 2003-07-04 2006-06-08 Ntn Corp. Radträger-Lager-Anordnung mit eingebautem Lastsensor
US7688216B2 (en) * 2003-08-29 2010-03-30 Ntn Corporation Wireless sensor system and wheel support bearing assembly utilizing the same
DE202005001566U1 (de) * 2005-01-31 2005-08-25 Ident Technology Ag Elektrische Schaltungsanordnung
JP4942665B2 (ja) * 2005-02-01 2012-05-30 ザ ティムケン カンパニー 保持器にマウントされたセンサを備える軸受
DE102005029984A1 (de) * 2005-06-28 2007-01-11 Schaeffler Kg Radialwälzlager, insbesondere einreihiges Rillen- oder Schrägwälzlager

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1766440A (en) * 1924-12-17 1930-06-24 Leon Karl Oskar Antifriction bearing
EP0395783A1 (fr) * 1989-05-05 1990-11-07 Gmn Georg Müller Nürnberg Ag Palier à capteur pour mesurer la vitesse de rotation et/ou l'angle de rotation
EP0530093A1 (fr) * 1991-08-26 1993-03-03 Snr Roulements Capteurs linéaires de faibles déplacements à circuits magnétiques et roulements à billes équipés de tels capteurs
EP0947724A2 (fr) * 1998-04-02 1999-10-06 Robert Bosch Gmbh Dispositif de frein de roue électromécanique
FR2857743A1 (fr) * 2003-07-15 2005-01-21 Skf Ab Systeme de mesure de rotation
WO2006100887A1 (fr) * 2005-03-22 2006-09-28 Ntn Corporation Roulement de roue avec capteur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112654797A (zh) * 2018-12-28 2021-04-13 舍弗勒技术股份两合公司 用于轴承可动部件的空间运动的参数采集及跟踪***、用于轴承可动部件的空间运动的参数采集及跟踪方法及轴承
CN112654797B (zh) * 2018-12-28 2022-11-01 舍弗勒技术股份两合公司 用于轴承可动部件的空间运动的参数采集及跟踪***、用于轴承可动部件的空间运动的参数采集及跟踪方法及轴承

Also Published As

Publication number Publication date
DE102007011718A1 (de) 2008-09-11

Similar Documents

Publication Publication Date Title
EP1563269B1 (fr) Palier dynamometrique
DE10057468B4 (de) Drehmomenterfassungssystem
WO2008110153A1 (fr) Palier à roulement, notamment palier à roulement à billes
DE4447996B4 (de) Verfahren zur Herstellung einer Achslageranordnung
EP1902289B1 (fr) Ensemble palier pour le logement d'au moins un élément de machine sur un support
EP1764521A2 (fr) Ensemble à roulement muni de capteur
EP2350480B1 (fr) Dispositif comprenant un element d'actionnement d'une boite de vitesses a roues dentees
EP1421355B1 (fr) Dispositif pour determiner des forces et/ou des moments s'exercant sur la suspension d'une roue dans un vehicule
WO2009052799A1 (fr) Procédé et dispositif permettant de régler le jeu de palier ou la précontrainte d'ensembles de paliers à roulement
DE102017221142A1 (de) Verfahren, Steuereinrichtung und System zum Ermitteln einer Profiltiefe eines Profils eines Reifens
EP3114449A1 (fr) Pièce structurale comprenant un élément de mesure comportant au moins un capteur
WO2009121879A1 (fr) Palier de mesure, notamment pour une paire de roues d’un véhicule ferroviaire
WO2021023584A1 (fr) Procédé de détermination d'une vitesse locale d'une voiture
DE102005055995A1 (de) Lageranordnung und Verfahren zur Einstellung der Vorspannung in der Lageranordnung
DE102019200780A1 (de) Führungswagen für eine Streckenführung, Streckenführung mit dem Führungswagen, und Verfahren zur Ermittlung einer Last des Führungswagens
DE112014000688T5 (de) Drehmomentsensor-Lageranordnung und Verfahren
EP1883565B1 (fr) Procede et dispositif de detection de la forme de roues sur rails
DE10100299A1 (de) Messanordnung in einem Wälzlager zur Detektierung physikalischer Größen
DE102019211934B4 (de) Verfahren zur Bestimmung einer Zuggeschwindigkeit eines Zugs mit mindestens einem Wagen
DE10356402B4 (de) Verfahren zur Bestimmung der Absolutposition von einem beweglichen Bauteil
DE102019211939A1 (de) Verfahren zur Bestimmung einer Wagengeschwindigkeit eines Wagens
EP3298871B1 (fr) Machine agricole , procédé de détéction d'une charge mécanique sur un élément d' une machine agricole
WO2003100352A1 (fr) Procede et ensemble de detection du mouvement d'un element
DE102017112342A1 (de) Messeinrichtung für eine Lageranordnung, Lageranordnung mit der Messeinrichtung sowie Verfahren zur Herstellung der Messeinrichtung
DE102011084260B4 (de) Aktiver Ringsensor mit Klemmnasen am Lager fixiert

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08715558

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 08715558

Country of ref document: EP

Kind code of ref document: A1