EP2427360A1 - Bearing system for a worm in a steering gear - Google Patents
Bearing system for a worm in a steering gearInfo
- Publication number
- EP2427360A1 EP2427360A1 EP10712419A EP10712419A EP2427360A1 EP 2427360 A1 EP2427360 A1 EP 2427360A1 EP 10712419 A EP10712419 A EP 10712419A EP 10712419 A EP10712419 A EP 10712419A EP 2427360 A1 EP2427360 A1 EP 2427360A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bearing
- worm
- outer ring
- spring element
- spring
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0409—Electric motor acting on the steering column
-
- 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
- F16C27/00—Elastic or yielding bearings or bearing supports, for exclusively rotary movement
- F16C27/04—Ball or roller bearings, e.g. with resilient rolling bodies
-
- 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
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/22—Toothed members; Worms for transmissions with crossing shafts, especially worms, worm-gears
- F16H55/24—Special devices for taking up backlash
-
- 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
- F16C2326/00—Articles relating to transporting
- F16C2326/20—Land vehicles
- F16C2326/24—Steering systems, e.g. steering rods or columns
-
- 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
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
- F16H2057/0213—Support of worm gear shafts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
- Y10T74/18792—Reciprocating or oscillating to or from alternating rotary including worm
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/19—Gearing
- Y10T74/19642—Directly cooperating gears
- Y10T74/19698—Spiral
- Y10T74/19828—Worm
Definitions
- the invention relates to the mounting of a screw in a steering gear according to the preamble of claim 1 and a corresponding steering gear and a power steering system equipped therewith according to the preamble of one of the independent claims.
- the invention relates to the storage of a screw by means of a floating bearing and a fixed bearing, wherein the fixed bearing is designed as a pivot bearing and a springing is provided for the screw.
- a first bearing fixed bearing
- a second bearing floating bearing
- the worm is radially secured, but can expand in the axial direction and always be sure to engage with a worm wheel due to the pivot bearing.
- the pivot bearing thus makes it possible that the worm is mounted slightly pivotable in the direction of engagement with the worm wheel.
- Fig. 1 shows this known construction, namely a steering gear 1, which is designed as a worm gear.
- the worm 3 and a worm wheel 4 are arranged in the housing 2, wherein the worm engages with the worm wheel and is mounted by means of a coupling 8 with the bearing 11 in a bearing Drive shaft 9 of an electric drive motor 10 is connected.
- the worm shaft itself is mounted in a shaft bearing 5, which has a ball bearing 6 in the form of a four-point bearing and is designed as a pendulum or pivot bearing.
- the worm 3 is acted upon radially with a biasing force and permanently pressed against the teeth of the worm wheel 4 and lusterrades.
- the pressure device 12 may be provided, for example, with a hydraulic device 14 and a pressure piece 15 actuated therefrom, which acts on the bearing 16 there or the worm 3 itself. Although it can be independently compensated for over the lifetime adjusting wear, but it has been shown that noise can occur at the shaft bearing 5, which can be eliminated only partially by the use of an expensive special camp.
- a bearing of a screw with the features of claim 1. Accordingly, a spring element is provided on a bearing of the screw, in particular on the fixed bearing, which acts on the spring of the worm a portion of the outer ring of the bearing with a spring force, which supports a pivoting of the worm gear towards the worm.
- Spring element is formed for example as a wedge ring or spring washer having a projection or a nose, which directly on the
- the bearing itself an axially acting on the pivotal mounting of the worm springing created that virtually no play occurs and thus effectively prevents the noise on the pivot bearing.
- the springing can be realized inexpensively and space-saving.
- any other type of elastic element can be used, such. a compression spring which exerts an axial spring force on a location of the outer ring on the same.
- the spring element is formed asymmetrically or asymmetrically disposed in the housing of the steering gear to act only on the one region of the outer ring of the bearing.
- the spring element is designed as an annular spring element, in particular as a wedge locking ring having a projection by means of which an axial spring force is exerted on the one region of the outer ring of the bearing.
- the spring element is formed as a disk-shaped spring element, in particular as a spring washer, which has a projection or nose to exert an axial spring force on the one region of the outer ring of the bearing.
- the spring washer can also be provided with a set screw.
- the spring element is e.g. formed as a wedge ring or spring washer, so the projection acts on the region of the outer ring, which is opposite to that portion of the screw which is in engagement with the worm wheel. This is compensated by the axially generated spring force of a tilting or
- the spring element is designed as an asymmetrically arranged in the housing of the steering gear compression spring, in particular as a helical compression spring. This can with a
- the compression spring is arranged on the region of the outer ring, which faces that region of the worm, which is in engagement with the worm wheel.
- the bearing has a combination of a plurality of such spring elements.
- Storage receptacle be designed as a pivot ring, wherein the spring element (eg, spring washer) acts on the outer ring with an axially acting force and presses against the pivot ring.
- the spring element eg, spring washer
- This construction is in the steering gear preferably provided on the fixed bearing of the worm, ie where the inner ring receives the driven shaft end of the worm, which is connected to a servo drive.
- the spring element preferably presses by means of a projection or a nose selectively and in the axial direction on a portion of the outer ring.
- the swivel ring has a concave sliding surface and the outer ring has a matching convex sliding surface, so that the one-sided force coming from the spring element causes the worm or worm shaft to pivot toward the worm wheel.
- Fig. 1 shows a conventional storage in the form of a pivot bearing
- Fig. 2a / b illustrate a first embodiment of the storage according to the invention, in which the spring element is designed as a wedge locking ring;
- Fig. 3a / b illustrate a second embodiment of the storage according to the invention, in which the spring element is designed as a spring washer;
- Fig. 4 illustrates a third embodiment of the storage according to the invention, in which the spring element is designed as a helical compression spring.
- Fig. 2 comprises the sub-figures 2a and 2b, which illustrate a storage according to the invention in a first embodiment.
- FIG. 2a shows a spring element FE1, which is designed as a wedge securing ring and serves to spring a worm in the steering gear illustrated in FIG. 2b and directly to one of the bearings, namely to the fixed bearing. is used.
- the spring element FE1 or the wedge securing ring has a projection N1, which acts directly on the outer ring 1 of the fixed bearing FL in the installed state (see Fig. 2b).
- the wedge ring has an opening 01 and securing elements E1.
- the securing elements E1 do not act on the outer ring 1, but on the pivot ring 6 and thus serve in particular for fixing the wedge securing ring FE1 per se.
- a worm S is mounted at its two shaft ends in the housing G, wherein the drive end shaft end in a bearing FL and the free end of the shaft are radially mounted in a floating bearing.
- the worm S is engaged with a worm wheel SR.
- a spring element here also the wedge securing ring FE1 shown in FIG. 2a, is arranged on the fixed bearing FL.
- the illustrated in Fig. 2b fixed bearing FL corresponds to a pivot bearing, which has substantially an outer ring 1, an inner ring 2 and between them movably received rolling elements 4, in the form of balls.
- a bearing mount which is formed in the form of a swivel ring 6 with a convex sliding surface, in turn, receives the outer ring 1, the Au z Terminal is concave.
- the inner ring 2 in turn, accommodates the (connected to the left) shaft end WS of the worm S connected to the servomotor (not shown here).
- the pivoting device thus created enables the worm S to be mounted so as to be slightly pivotable in the direction of engagement with the worm wheel SR.
- the other, free shaft end of the screw S (here on the right side) located floating bearing LL causes only a radial bearing of this shaft end. So that a pivoting V of the screw S is possible, the floating bearing LL is arranged so that a corresponding possibility of movement in the radial direction to the worm wheel SR out and vice versa is possible.
- a slot recording the movable bearing LL or the like may be provided.
- the spring element FE1 is installed on the pivot bearing (fixed bearing) FL, which axially springs a certain area of the outer ring 1, so here with a rightward Force.
- a wedge locking ring spring element FE1 is mounted between the pivot ring 6 and a Befest Trentsschraubring BS, wherein the nose-shaped projection N1 (see Fig. 2a) presses directly on the area 1 B of the outer ring 1, that of the area Slug S is opposite which is engaged with the worm wheel SR.
- the axial spring force is converted into a pivoting moment which pivots the worm S towards the worm wheel SR (see turning arrow V in Fig. 2b).
- a noise-generating bearing clearance can occur.
- the provided on the wedge ring FE1 nose N1 extends initially in the radial direction inwards and then in the region of the outer ring 1 in the axial direction (here to the right) angled or has an angled edge (wedge), in the assembled state directly to the outer ring 1 in the area
- FIG. 3 comprises the subfigures 3 a and 3 b, which illustrate a bearing according to the invention in a second embodiment.
- Fig. 3a shows a spring element in the form of a spring washer FE2, which also serves to spring the worm (see Fig. 3b).
- the spring washer FE2 has a projection or a nose N2, which in the installed state acts directly on the one area 1B of the outer ring 1 of the fixed bearing FL (see Fig. 3b).
- Fig. 3b illustrated fixed warehouse FL corresponds to one
- FIG. 4 also shows a bearing according to the invention in a third embodiment.
- the springing of the bearing of the worm S takes place by means of a spring element FE3 designed as a compression spring.
- the compression spring is a helical compression spring, which in the housing G with respect to the
- Outer ring 1 is mounted asymmetrically or on one side, namely here in the lower
- the compression spring FE3 is provided with a pressure peak SP3, which consequently presses on the area 1 B 'of the outer ring 1, that of the one
- the spring elements described can also be provided multiple times and / or combined with each other. So it is e.g. conceivable that in addition to a springing by means of spring washer, as shown in FIG. 3a / b, nor a springing by means of compression spring, as shown in Fig. 4, is used.
- the compression spring may also be integrated in the adjusting or screw ring 6 (see FIG.
- a bearing is provided which is provided for a worm with a worm in engagement in a steering gear.
- the storage has at least a first bearing, which is preferably designed as a fixed bearing.
- This bearing has essentially an outer ring, an inner ring and between them movably received rolling elements and is pivotally mounted in a bearing receptacle, which in turn receives the outer ring of the bearing.
- the inner ring in turn receives one of the two shaft ends of the worm, to store this shaft end of the worm radially in the housing of the steering gear.
- at least one spring element is provided on the bearing, the one
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Power Steering Mechanism (AREA)
- Gear Transmission (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009002940A DE102009002940A1 (en) | 2009-05-08 | 2009-05-08 | Storage of a worm in a steering gear |
PCT/EP2010/054291 WO2010127915A1 (en) | 2009-05-08 | 2010-03-31 | Bearing system for a worm in a steering gear |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2427360A1 true EP2427360A1 (en) | 2012-03-14 |
Family
ID=42111854
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10712419A Withdrawn EP2427360A1 (en) | 2009-05-08 | 2010-03-31 | Bearing system for a worm in a steering gear |
Country Status (5)
Country | Link |
---|---|
US (1) | US8539849B2 (en) |
EP (1) | EP2427360A1 (en) |
CN (1) | CN102421654B (en) |
DE (1) | DE102009002940A1 (en) |
WO (1) | WO2010127915A1 (en) |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102426101A (en) * | 2011-09-05 | 2012-04-25 | 浙江台玖精密机械有限公司 | Special meshing instrument pedestal used in worm gear worm meshing precision detection and working method thereof |
DE102012103146A1 (en) * | 2012-04-12 | 2013-10-17 | Zf Lenksysteme Gmbh | STEERING GEAR |
WO2013161845A1 (en) * | 2012-04-25 | 2013-10-31 | 株式会社ジェイテクト | Electric power steering device |
JP6020893B2 (en) * | 2012-07-27 | 2016-11-02 | 株式会社ジェイテクト | Electric power steering device |
DE102013003749A1 (en) * | 2013-03-06 | 2014-09-11 | Thyssenkrupp Presta Aktiengesellschaft | Angularly movable bearing arrangement for pinions in reduction gears of electromechanical steering systems |
DE102013104521A1 (en) * | 2013-05-03 | 2014-11-20 | Zf Lenksysteme Gmbh | STEERING GEAR |
DE102013213708A1 (en) * | 2013-07-12 | 2015-01-15 | Volkswagen Aktiengesellschaft | Worm gear for a power steering device of a motor vehicle with clearance compensation |
CN104326014B (en) * | 2013-07-22 | 2016-09-07 | 北汽福田汽车股份有限公司 | Steering gear and there is the vehicle of this steering gear |
DE102014107073A1 (en) * | 2014-05-20 | 2015-11-26 | Robert Bosch Automotive Steering Gmbh | steering gear |
DE102014212133A1 (en) * | 2014-06-25 | 2015-12-31 | Robert Bosch Gmbh | drive unit |
DE102014110306A1 (en) * | 2014-07-22 | 2016-01-28 | Thyssenkrupp Ag | Electromechanical power steering |
JP6350671B2 (en) * | 2014-10-09 | 2018-07-04 | 日本精工株式会社 | Worm reducer and worm reducer assembly method |
JP6517041B2 (en) * | 2015-02-24 | 2019-05-22 | 住友重機械工業株式会社 | Reduction gear |
GB201504960D0 (en) * | 2015-03-24 | 2015-05-06 | Trw Ltd | A gearbox assembly for an electric power steering assembly |
WO2016181871A1 (en) * | 2015-05-13 | 2016-11-17 | 日本精工株式会社 | Worm gear reducer |
JP6502170B2 (en) * | 2015-05-14 | 2019-04-17 | 愛知機械工業株式会社 | Gap adjusting member, assembling method of gap adjusting member, and transmission |
CN104832544A (en) * | 2015-05-18 | 2015-08-12 | 江苏联动轴承有限公司 | Special self-lubricating self-aligning worm assembly bearing for automobile EPS (electronic power steering) |
GB201511826D0 (en) * | 2015-07-06 | 2015-08-19 | Trw Ltd | A gearbox assembly for an electric power steering assembly |
KR20170073921A (en) * | 2015-12-21 | 2017-06-29 | 주식회사 만도 | Reducer for vehicle |
DE102016104150A1 (en) * | 2016-03-08 | 2017-09-14 | Robert Bosch Automotive Steering Gmbh | steering gear |
DE102016211714B3 (en) * | 2016-06-29 | 2017-09-07 | Ford Global Technologies, Llc | Transmission unit for a motor vehicle |
DE102016211715A1 (en) | 2016-06-29 | 2018-01-04 | Ford Global Technologies, Llc | Transmission unit for a motor vehicle |
DE202016103802U1 (en) | 2016-06-29 | 2016-07-27 | Ford Global Technologies, Llc | Transmission unit for a motor vehicle |
CN106321783B (en) * | 2016-09-26 | 2019-04-16 | 安徽江淮汽车集团股份有限公司 | A kind of worm screw support construction |
DE102016012246A1 (en) * | 2016-10-14 | 2018-04-19 | Thyssenkrupp Ag | Electromechanical power steering with sprung bearing arrangement |
DE102017200008B4 (en) | 2017-01-02 | 2022-09-29 | Ford Global Technologies, Llc | Transmission unit for a motor vehicle |
DE202017100155U1 (en) | 2017-01-02 | 2017-03-13 | Ford Global Technologies, Llc | Transmission unit for a motor vehicle |
DE102017200009A1 (en) | 2017-01-02 | 2018-07-05 | Ford Global Technologies, Llc | Transmission unit for a motor vehicle |
FR3067084B1 (en) * | 2017-05-31 | 2019-07-19 | Jtekt Europe | SEAL PLUG FOR REDUCER HOUSING CARRYING A GEAR SET COMPENSATION TROLLEY |
DE102017221153A1 (en) * | 2017-11-27 | 2019-05-29 | Ford Global Technologies, Llc | Bearing arrangement and steering gear |
DE102018200090A1 (en) * | 2018-01-04 | 2019-07-04 | Robert Bosch Gmbh | worm gear |
DE102018200089A1 (en) * | 2018-01-04 | 2019-07-04 | Robert Bosch Gmbh | Steering gear for a motor vehicle |
DE102019105872A1 (en) * | 2018-03-08 | 2019-09-12 | Steering Solutions Ip Holding Corporation | Offset of a hole for a floating worm bearing |
DE102018106026A1 (en) | 2018-03-15 | 2019-09-19 | Thyssenkrupp Ag | Worm gear with a swivel bearing with a defined swivel axis |
CN108488369B (en) * | 2018-03-27 | 2021-01-05 | 浙江吉利控股集团有限公司 | Steering column with adjustable gap and automobile |
DE102018009030A1 (en) * | 2018-11-16 | 2020-05-20 | Zf Active Safety Gmbh | Bearing arrangement |
DE102019118406A1 (en) * | 2019-07-08 | 2021-01-14 | Schaeffler Technologies AG & Co. KG | Noise-optimized storage unit for a power steering-assisted steering gear |
CN114435462B (en) * | 2020-11-05 | 2024-05-24 | 操纵技术Ip控股公司 | Linear worm and worm gear assembly |
CN114273920B (en) * | 2022-01-24 | 2023-03-28 | 湖南电气职业技术学院 | Assembling equipment for automobile worm gear and worm reducer |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3425239A (en) * | 1967-02-10 | 1969-02-04 | Boeing Co | Shaft damper |
JP3799236B2 (en) * | 2001-01-22 | 2006-07-19 | 株式会社ジェイテクト | Electric power steering device |
GB9718574D0 (en) | 1997-09-03 | 1997-11-05 | Lucas Ind Plc | Improvements relating to gears |
JP2000159128A (en) * | 1998-11-26 | 2000-06-13 | Nsk Ltd | Electric power steering device |
JP4221825B2 (en) * | 1999-06-28 | 2009-02-12 | 株式会社ジェイテクト | Electric steering device |
JP2001130423A (en) * | 1999-11-05 | 2001-05-15 | Kayaba Ind Co Ltd | Motor-driven power steering device |
JP3653611B2 (en) * | 2000-05-18 | 2005-06-02 | 光洋精工株式会社 | Electric steering device |
DE10051306A1 (en) * | 2000-10-17 | 2002-04-18 | Bosch Gmbh Robert | Gear for a motor vehicle steering assembly used e.g. in a servo unit of an electrical power-assisted steering arrangement comprises a pinion arranged on a shaft so that it does not rotate, and a toothed wheel interacting with the pinion |
DE10161715A1 (en) | 2001-12-15 | 2003-06-18 | Zf Lenksysteme Gmbh | Electrical power steering for motor vehicle has hydraulic pressure biasing device, coupling for connecting drive shaft to worm and pivotable bearing in coupling region |
CN100519300C (en) * | 2003-02-20 | 2009-07-29 | 日本精工株式会社 | Electric-powered power steering apparatus |
KR100816401B1 (en) * | 2006-07-05 | 2008-03-27 | 주식회사 만도 | Electronic Steering Apparatus |
DE102006039740A1 (en) * | 2006-08-24 | 2008-02-28 | Schaeffler Kg | Auxiliary drive, particularly electromechanical auxiliary drive for steering gear, has housing device, spur gear, spiral spindle is held in housing device and engages with spur gear over meshing zone |
-
2009
- 2009-05-08 DE DE102009002940A patent/DE102009002940A1/en not_active Withdrawn
-
2010
- 2010-03-31 WO PCT/EP2010/054291 patent/WO2010127915A1/en active Application Filing
- 2010-03-31 CN CN201080020113.8A patent/CN102421654B/en not_active Expired - Fee Related
- 2010-03-31 EP EP10712419A patent/EP2427360A1/en not_active Withdrawn
-
2011
- 2011-11-03 US US13/373,080 patent/US8539849B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2010127915A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN102421654B (en) | 2014-05-07 |
CN102421654A (en) | 2012-04-18 |
US8539849B2 (en) | 2013-09-24 |
WO2010127915A1 (en) | 2010-11-11 |
US20120125132A1 (en) | 2012-05-24 |
DE102009002940A1 (en) | 2010-11-11 |
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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 |
|
17P | Request for examination filed |
Effective date: 20111017 |
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