WO2012153541A1 - 変速機のシフト操作部材 - Google Patents
変速機のシフト操作部材 Download PDFInfo
- Publication number
- WO2012153541A1 WO2012153541A1 PCT/JP2012/003097 JP2012003097W WO2012153541A1 WO 2012153541 A1 WO2012153541 A1 WO 2012153541A1 JP 2012003097 W JP2012003097 W JP 2012003097W WO 2012153541 A1 WO2012153541 A1 WO 2012153541A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- shift
- fork
- operation member
- shift operation
- sleeve
- Prior art date
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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
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
Definitions
- the present invention relates to a shift operation member that shifts a sleeve used in a synchronization device or the like in a transmission, and more particularly to improvement of rigidity balance of the shift operation member.
- the shift operation member is generally constituted by a shift fork that engages with a sleeve and a fork shaft that pushes the shift fork in the axial direction of the sleeve.
- the shift fork has two arm portions that are curved and extend from the mounting portion to both sides, and a claw portion that is formed at the tip of the arm portion and engages with the outer circumferential groove of the substantially annular sleeve.
- the fork shaft is coupled to the mounting portion of the shift fork and moves in the axial direction of the sleeve.
- a shift fork of a manual transmission for a vehicle disclosed in Patent Document 1 includes a mounting portion, an arm portion that is bent and extended in a semicircular shape from the mounting portion, and a pair of arms formed at both ends of the arm portion.
- a claw part is provided, and a plurality of sliding contact protrusions are provided on the arm part.
- the claw portions at both ends of the shift fork are provided with a lubricating oil supply mechanism.
- the present invention has been made in view of the above problems of the background art, and the rigidity of the two claw portions engaged with the sleeve is balanced so that no adverse effects such as uneven wear occur. Providing a shift operating member of a machine is a problem to be solved.
- An invention of a shift operation member for a transmission that solves the above-described problems includes an attachment portion, two arm portions that are curved and extend from the attachment portion to both sides, and a substantially annular sleeve that is formed at the tip of each arm portion.
- a shift fork having a claw portion that engages with an outer peripheral groove of the shift fork shaft, and a fork shaft that is coupled to the mounting portion of the shift fork and is movable in the axial direction of the sleeve, and the sleeve is shifted in the axial direction.
- the two arm portions of the shift fork are a long arm portion and a short arm portion having different lengths, and have different cross-sectional rigidity perpendicular to the axis of the fork shaft. The distance between the center line extending in the most rigid direction and the claw at the tip of the long arm is smaller than the distance between the center line and the claw at the tip of the short arm.
- the fork shaft has a rectangular cross section perpendicular to the axis, and the center line extending in the most rigid direction is parallel to the long side of the rectangular cross section.
- the shift fork may be manufactured by press molding.
- the shift fork has a long arm portion and a short arm portion having different lengths, the cross-sectional rigidity of the fork shaft is different, and the center line extends in the strongest direction. And the distance between the claw at the tip of the long arm and the distance between the center line and the claw at the tip of the short arm.
- the deflection amount (deformation amount) when considering the shift fork alone is determined by the moment depending on the arm length, the deflection amount of the long arm side claw is large and the deflection of the short arm side claw portion is large. The amount becomes smaller.
- the load acting on the claw is transmitted to the fork shaft and bends the fork shaft.
- the amount of deflection in the direction of strong rigidity of the fork shaft is small, and the amount of deflection in the direction of weak rigidity becomes remarkable. Therefore, the fork shaft bends significantly in the direction orthogonal to the center line, and bends toward the short arm portion where the distance from the center line is large and the moment is large. The bending of the fork shaft generates a displacement amount in the axial direction in the claw portion, and the direction of displacement is reversed between the two claw portions.
- This amount of displacement is subtracted from the amount of deflection when the shift fork alone is considered at the long arm side claw, and is added to the amount of deflection when the shift fork is considered alone at the short arm side claw. That is, the displacement amount is subtracted from the large deflection amount in the long arm portion side claw portion, and the displacement amount is added to the small deflection amount in the short arm portion side claw portion.
- claw part when it sees as the whole shift operation member is equalized, and rigidity balance becomes favorable. Therefore, the amount of displacement of the left and right arms and the imbalance of the load on the claw are suppressed, and adverse effects such as uneven wear on the cone surface of the synchronizer ring do not occur.
- FIG. 1 is a partial cross-sectional view illustrating a general configuration of the synchronization device 8 and the shift operation member 9 in the transmission.
- the synchronization device 8 is a device that selectively couples one of the two transmission gears 82, 83 loosely fitted to the rotation shaft 81 to the rotation shaft 81, and includes a clutch hub 84, a sleeve 85, and synchronizer rings 86, 87.
- the axis AX is generally symmetrical about the axis AX.
- the clutch hub 84 is an annular portion that protrudes from the outer periphery of the rotary shaft 81 and rotates integrally, and has outer teeth 841 on the outer periphery thereof.
- the sleeve 85 is a cylindrical member, and has inner teeth 851 that are spline-fitted with the outer teeth 841 of the clutch hub 84 on the inner peripheral surface.
- the sleeve 85 is configured to slide in the axial direction outside the clutch hub 84.
- An outer peripheral groove 852 is formed on the entire outer periphery of the sleeve 85.
- the two transmission gears 82 and 83 and the synchronizer rings 86 and 87 have a similar structure with the clutch hub 84 interposed therebetween, and one of them will be described as an example.
- the transmission gear 82 is pivotally supported on the rotary shaft 81 via a needle bearing 821.
- the transmission gear 82 has teeth 822 on the outer periphery. The teeth 822 always mesh with teeth of a gear (not shown) that rotates integrally with another rotating shaft (not shown) arranged in parallel to the rotating shaft 81.
- the transmission gear 82 is provided with a gear piece 823 that rotates integrally.
- the gear piece 823 has outer teeth 824 that are spline-fitted with the inner teeth 851 of the sleeve 85 on the outer periphery, and further has an outer cone surface 825 that projects in a tapered shape on the side surface on the clutch hub 84 side.
- a synchronizer ring 86 is disposed between the gear piece 823 of the transmission gear 82 and the clutch hub 84.
- the synchronizer ring 86 has outer teeth 861 that are spline-fitted with the inner teeth 841 of the sleeve 84 on the outer periphery, and further has an inner peripheral cone surface 862 that can be frictionally engaged with the outer peripheral cone surface 825 of the gear piece 823 on the inner periphery. ing.
- FIG. 2A is a partial cross-sectional view orthogonal to an axis AX schematically illustrating the shift operation member 1 of the transmission according to the first embodiment of the present invention
- FIG. 2B is a view in the X direction of FIG. 2A
- FIG. It is a Y direction view of FIG. 2A.
- the shift operation member 1 of the first embodiment is configured to push the sleeve 85 of the synchronization device 8 shown in FIG. 1 in the axial direction, and includes a shift fork 2 and a fork shaft 3.
- the shift fork 2 is a member having a substantially rectangular cross section and curved and extending in a substantially arc shape.
- a mounting portion 21 is formed at a position shifted from the arcuate lengthwise center of the shift fork 2.
- the long side (right side in the figure) from the attachment part 21 to the arcuate tip becomes the long arm part 22, and the short side (left side in the figure) becomes the short arm part 23.
- a long arm portion side claw portion 24 is formed at the tip of the long arm portion 22, and a short arm portion side claw portion 25 is formed at the tip of the short arm portion 23 side.
- the long arm portion side claw portion 24 and the short arm portion side claw portion 25 actually have a certain contact area and engage with the outer peripheral groove 852 of the sleeve 85, but are schematically illustrated in order to simplify the description. It shall be indicated by a dot.
- the long arm portion side claw portion 24 and the short arm portion side claw portion 25 are disposed at symmetrical positions with the axis AX interposed therebetween.
- the fork shaft 3 is coupled to the mounting portion 21 of the shift fork 2.
- a coupling method a method in which a convex portion is provided on one member and a concave portion is provided on the other member to be fitted, or a method in which welding is joined can be used.
- the fork shaft 3 is supported by a transmission housing (not shown) and is configured to be driven in the direction of the axis AX by an operation mechanism (not shown).
- the fork shaft 3 has a rectangular cross section orthogonal to the axis AX, and extends in the direction of the axis AX. In the rectangular cross section, the rigidity is anisotropic, and the direction with the strongest rigidity is parallel to the long side.
- the fork shaft 3 is not easily bent up and down and is easily bent right and left.
- the fork shaft 3 is coupled to the outer peripheral arc surface of the shift fork 2 at an inclination rather than perpendicularly.
- the center line CL passing through the center C of the rectangular cross section and parallel to the long side is biased toward the long arm portion side claw portion 24 side with respect to the axis line AX.
- the distance Rx between the center line CL and the long arm portion side claw portion 24 is smaller than the distance Lx between the center line CL and the short arm portion side claw portion 25 (Rx ⁇ Lx).
- the distance Ry parallel to the center line CL between the center C and the long arm portion side claw portion 24 is larger than the distance Ly parallel to the center line CL between the center C and the short arm portion side claw portion 25. (Ry> Ly).
- FIG. 3A is a diagram that schematically and exaggerates the operation of the shift operation member 1 of the first embodiment, and shows the deflection amounts (deformation amounts) Ra and La when considered with the shift fork 2 alone.
- FIG. 3B is a diagram schematically illustrating the operation of the shift operation member 1 of the first embodiment in an exaggerated manner, and is a view in the Y direction showing the influence of the bending of the fork shaft 3.
- the actual displacement amounts ⁇ R and ⁇ L of the long arm portion side claw portion 24 and the short arm portion side claw portion 25 when viewed as the shift operation member 1 as a whole are the sum of FIGS. 3A and 3B.
- FIG. 7A is a view of the conventional shift operation member 7 as viewed from the axial direction
- FIG. 7B is a view of the conventional shift operation member 7 as viewed from the side.
- the conventional shift operation member 7 is also composed of a shift fork 71 and a fork shaft 72 as in the present invention.
- the arc-shaped portion constituting the long arm portion 712 and the short arm portion 713 and the attachment portion 711 are coupled by a planar coupling portion 716.
- the conventional shift fork 71 has a complicated shape and is manufactured by casting.
- the conventional fork shaft 72 is a round bar that is isotropic and has high rigidity in any direction. In the conventional shift operation member 7, the rigidity is increased in each of the shift fork 71 and the fork shaft 72 in order to obtain a rigidity sufficient to suppress the deflection, resulting in an increase in weight and an increase in cost. .
- the shift fork 2 has a simple shape and the fork shaft 3 is lighter than the conventional round bar, but the overall rigidity balance is improved. ing. Thereby, the unbalance of the displacement amount of the left and right arm portions 212 and 213 and the unbalance of the load of the claw portions 214 and 215 are suppressed, and adverse effects such as uneven wear of the inner peripheral cone surface 862 of the synchronizer ring 86 do not occur.
- the fork shaft 3 having a small cross-sectional area is used to cancel the deflection of the fork shaft 3 by using the bending in the direction of low rigidity, and in addition, the shift fork 2 having a simple shape is used.
- the effect of reducing the size and weight is remarkable.
- the shift fork 2 having a simple shape can be manufactured by press molding, it is less expensive than conventional casting, and the effect of cost reduction is remarkable.
- FIG. 4 is a partial cross-sectional view orthogonal to an axis AX that schematically illustrates the shift operation member 1A of the second embodiment.
- This configuration can be realized by changing the inclination angle of the coupling of the fork shaft 3A in the mounting portion 21 of the shift fork 2.
- FIG. 5 is a partial cross-sectional view orthogonal to the axis AX that schematically illustrates the shift operation member 1B of the third embodiment.
- the three of the axis line AX, the short arm portion side claw portion 25, and the long arm portion side claw portion 24 are arranged on the same side (left side in FIG. 5) of the center line CL.
- This configuration can be realized by changing the inclination angle of the coupling of the fork shaft 3A in the mounting portion 21 of the shift fork 2.
- the load F acting on the long arm side claw portion 24 on the center line CL is hardly involved in the bending of the fork shaft 3A in the short side direction (direction perpendicular to the center line CL). Then, the fork shaft 3A is bent in the same direction as the first embodiment (as shown in FIG. 3B) by the load F mainly acting on the short arm portion side claw portion 25.
- the third embodiment moments generated in the fork shaft 3B by the load F acting on the short arm portion side claw portion 25 and the long arm portion side claw portion 24 are in the same direction. Therefore, the fork shaft 3B bends significantly in the same direction as the first embodiment.
- the action of the bending of the shift forks 2A and 2B alone in the second and third embodiments is substantially the same as that in the first embodiment.
- the center line CL is biased from the axis AX toward the long arm portion side claw portion 24 side to be one of the first to third embodiments, and the cross-sectional dimension of the fork shaft 3 (3A, 3B) is appropriately selected.
- the displacement amounts ⁇ R and ⁇ L of the long arm portion side claw portion 24 and the short arm portion side claw portion 25 can be made equal.
- the inclination angle for biasing the center line CL is determined in consideration of the characteristics regarding the size, shape and rigidity of the shift fork 2 (2A, 2B) and the fork shaft 3 (3A, 3B), the assumed load F, and the like. It is preferable.
- FIG. 6A is a partial cross-sectional view orthogonal to an axis AX for schematically explaining the shift operation member 1C of the fourth embodiment
- FIG. 6B is a partial cross-sectional view of a reference form on which the fourth embodiment is based.
- the center line CL of the rectangular cross section of the fork shaft 3X passes through the axis AX.
- the distance Rx between the center line CL and the long arm portion side claw portion 24 is substantially equal to the distance Lx between the center line CL and the short arm portion side claw portion 25 (Rx ⁇ Lx).
- the position of the mounting portion 21 of the shift fork 2C is shifted to the long arm portion 22 side from the reference form of FIG. 6B, and the center line CL is translated and coupled without changing the inclination angle of the fork shaft 3C. is doing.
- the configuration of the shift operation member 1C of the fourth embodiment substantially matches the first embodiment.
- the operation and effect are also the same as those in the first embodiment, and a description thereof will be omitted.
- the fork shaft 3 is not limited to a rectangular cross section, and the substantially rectangular cross section of the shift fork 2 is not limited. Various other modifications and applications of the present invention are possible.
- the present invention can be widely used for manual transmissions and automatic transmissions.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
Description
2、2A、2B、2C:シフトフォーク
21:取付部 22:長腕部 23:短腕部
24:長腕部側爪部 25:短腕部側爪部
3、3A、3B、3C:フォークシャフト
7:従来のシフト操作部材
71:シフトフォーク
711:取付部 712:長腕部 713:短腕部
714:長腕部側爪部 715:短腕部側爪部
716:結合部 717、718:補強リブ
72:フォークシャフト
8:同期装置
81:回転軸 82、83:変速ギヤ 84:クラッチハブ
85:スリーブ 86、87:シンクロナイザリング
9:一般的なシフト操作部材
AX:軸線 CL:中心線 Rx、Lx、Ry、Ly:距離
Ra、La:たわみ量(変形量) +Lb、-Rb:変位量
ΔR:長腕部側爪部の変位量 ΔL:短腕部側爪部の変位量
Claims (3)
- 取付部及び、前記取付部から両側に湾曲して延在する2つの腕部及び、各腕部の先端に形成されて略環状のスリーブの外周溝に係合する爪部を有するシフトフォークと、前記シフトフォークの前記取付部に結合して前記スリーブの軸線方向に移動可能なフォークシャフトとを備え、前記スリーブを前記軸線方向にシフト操作する変速機のシフト操作部材であって、
前記シフトフォークの前記2つの腕部は、長さが異なる長腕部及び短腕部であり、
前記フォークシャフトの前記軸線と直交する断面の剛性に異方性があり、最も剛性の強い方向に延びる中心線と前記長腕部の先端の爪部との距離が、前記中心線と前記短腕部の先端の爪部との距離よりも小さいことを特徴とする変速機のシフト操作部材。 - 前記フォークシャフトは、前記軸線と直交する断面が長方形断面であって、最も剛性の強い方向に延びる前記中心線が前記長方形断面の長辺に平行している請求項1に記載の変速機のシフト操作部材。
- 前記シフトフォークをプレス成型加工により製造した請求項1または2に記載の変速機のシフト操作部材。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112013028269A BR112013028269A2 (pt) | 2011-05-11 | 2012-05-11 | elemento de operação de mudança de transmissão |
CN201280022746.1A CN103562602B (zh) | 2011-05-11 | 2012-05-11 | 变速箱的换挡操作构件 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011-105914 | 2011-05-11 | ||
JP2011105914A JP5723209B2 (ja) | 2011-05-11 | 2011-05-11 | 変速機のシフト操作部材 |
Publications (1)
Publication Number | Publication Date |
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WO2012153541A1 true WO2012153541A1 (ja) | 2012-11-15 |
Family
ID=47139027
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/003097 WO2012153541A1 (ja) | 2011-05-11 | 2012-05-11 | 変速機のシフト操作部材 |
Country Status (4)
Country | Link |
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JP (1) | JP5723209B2 (ja) |
CN (1) | CN103562602B (ja) |
BR (1) | BR112013028269A2 (ja) |
WO (1) | WO2012153541A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105849442A (zh) * | 2014-01-09 | 2016-08-10 | 本田技研工业株式会社 | 变速器的同步装置 |
DE102018211027A1 (de) * | 2018-07-04 | 2020-01-09 | Zf Friedrichshafen Ag | Schalteinrichtung, Getriebe sowie Kraftfahrzeug |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109854737B (zh) * | 2019-02-14 | 2024-08-02 | 中国第一汽车股份有限公司 | 一种等叉脚刚度的拨叉结构 |
CN110930359A (zh) * | 2019-10-21 | 2020-03-27 | 浙江科技学院 | 一种检测汽车拨叉的方法及系统 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6220211U (ja) * | 1985-07-23 | 1987-02-06 | ||
JPS63257811A (ja) * | 1987-04-16 | 1988-10-25 | Mazda Motor Corp | シフトフオ−ク |
JPH07127738A (ja) * | 1993-11-04 | 1995-05-16 | Mazda Motor Corp | 電子制御変速機 |
JPH10267122A (ja) * | 1997-03-25 | 1998-10-09 | Mazda Motor Corp | 変速機の変速操作装置 |
JP2004324812A (ja) * | 2003-04-25 | 2004-11-18 | Honda Motor Co Ltd | 変速機 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63130815U (ja) * | 1987-02-13 | 1988-08-26 | ||
DE102007013929A1 (de) * | 2007-03-23 | 2008-09-25 | Zf Friedrichshafen Ag | Anordnung einer Schaltschwinge in einem Getriebe |
JP4407745B2 (ja) * | 2007-12-05 | 2010-02-03 | トヨタ自動車株式会社 | シフトフォーク |
DE102008009987A1 (de) * | 2008-02-19 | 2009-08-27 | Koki Technik Transmission Systems Gmbh | Verfahren zum Zusammenfügen von Getriebebauteilen |
JP2010242805A (ja) * | 2009-04-02 | 2010-10-28 | Toyota Motor Corp | 変速機 |
CN201672050U (zh) * | 2010-04-23 | 2010-12-15 | 丹阳市富豪机械制造有限公司 | 变速箱换档拨叉 |
-
2011
- 2011-05-11 JP JP2011105914A patent/JP5723209B2/ja not_active Expired - Fee Related
-
2012
- 2012-05-11 CN CN201280022746.1A patent/CN103562602B/zh not_active Expired - Fee Related
- 2012-05-11 WO PCT/JP2012/003097 patent/WO2012153541A1/ja active Application Filing
- 2012-05-11 BR BR112013028269A patent/BR112013028269A2/pt not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6220211U (ja) * | 1985-07-23 | 1987-02-06 | ||
JPS63257811A (ja) * | 1987-04-16 | 1988-10-25 | Mazda Motor Corp | シフトフオ−ク |
JPH07127738A (ja) * | 1993-11-04 | 1995-05-16 | Mazda Motor Corp | 電子制御変速機 |
JPH10267122A (ja) * | 1997-03-25 | 1998-10-09 | Mazda Motor Corp | 変速機の変速操作装置 |
JP2004324812A (ja) * | 2003-04-25 | 2004-11-18 | Honda Motor Co Ltd | 変速機 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105849442A (zh) * | 2014-01-09 | 2016-08-10 | 本田技研工业株式会社 | 变速器的同步装置 |
CN105849442B (zh) * | 2014-01-09 | 2018-02-13 | 本田技研工业株式会社 | 变速器的同步装置 |
DE102018211027A1 (de) * | 2018-07-04 | 2020-01-09 | Zf Friedrichshafen Ag | Schalteinrichtung, Getriebe sowie Kraftfahrzeug |
Also Published As
Publication number | Publication date |
---|---|
JP2012237354A (ja) | 2012-12-06 |
CN103562602B (zh) | 2015-11-25 |
CN103562602A (zh) | 2014-02-05 |
JP5723209B2 (ja) | 2015-05-27 |
BR112013028269A2 (pt) | 2019-09-24 |
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