EP1795301B1 - Disque de ponçage avec dispositif de fermeture et de blocage rapide et ponceuse à disque avec une telle disque - Google Patents

Disque de ponçage avec dispositif de fermeture et de blocage rapide et ponceuse à disque avec une telle disque Download PDF

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Publication number
EP1795301B1
EP1795301B1 EP06023804A EP06023804A EP1795301B1 EP 1795301 B1 EP1795301 B1 EP 1795301B1 EP 06023804 A EP06023804 A EP 06023804A EP 06023804 A EP06023804 A EP 06023804A EP 1795301 B1 EP1795301 B1 EP 1795301B1
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EP
European Patent Office
Prior art keywords
projections
backing pad
bayonet
plug
recess
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.)
Active
Application number
EP06023804A
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German (de)
English (en)
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EP1795301A1 (fr
Inventor
Christian Kneip
Torsten Reuss
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.)
Festool GmbH
Original Assignee
Festool GmbH
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Filing date
Publication date
Application filed by Festool GmbH filed Critical Festool GmbH
Priority to EP09000740A priority Critical patent/EP2052813B1/fr
Publication of EP1795301A1 publication Critical patent/EP1795301A1/fr
Application granted granted Critical
Publication of EP1795301B1 publication Critical patent/EP1795301B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/16—Bushings; Mountings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B23/00—Portable grinding machines, e.g. hand-guided; Accessories therefor
    • B24B23/02—Portable grinding machines, e.g. hand-guided; Accessories therefor with rotating grinding tools; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B45/00—Means for securing grinding wheels on rotary arbors
    • B24B45/006—Quick mount and release means for disc-like wheels, e.g. on power tools

Definitions

  • the invention relates to a sanding pad according to the preamble of claim 1 and a disc sander with a holding device for releasably securing a sanding plate.
  • a grinding wheel in the manner of the preamble of claim 1 and a disc sander with a holding device for holding such a grinding wheel go out DE 202 05 495 Ul forth.
  • WO 01/76822 A1 is a grinding machine with a grinding machine tool holder, in which the insert tool is rotated via a resiliently mounted locking element until the locking element, such as a bolt, engages in a bore on the insert tool and fixed in a form-fitting manner.
  • Disc grinders are hand-guided devices and are used for grinding workpieces. Depending on the grinding work to be performed or in the event of wear, a sanding disk change may be required. This removal and attachment of the sanding plate should be possible without tools and without any special difficulties for the user.
  • the object of the invention the assembly and disassembly of a sanding pad of the type mentioned in a holding device of a disc sander, in particular Exzentertellerschleifers, as simple as possible while doing tool-less.
  • the sanding plate should rotate as plan as possible.
  • Bayonet joints generally have a relatively large diameter. Accordingly, in the present case, the diameter can be made large, which favors the flat circulation of the grinding plate.
  • the grinding disc according to the invention has one opposite to that of the workpiece to be ground during use Top outgoing, substantially circular plug-in recess for immersing the holding part.
  • the plug recess containing, consisting of rigid material upper part of the grinding plate can be kept relatively flat, so that an attached to the upper part sanding pad lower part made of elastically deformable plastic material can be made correspondingly thicker.
  • Sanding plates usually have an elastic lower part, on the underside of which the abrasive machining exporting abrasive is attached. In this case, the elastic lower part provides a good nestling of the abrasive to the workpiece, even if it is uneven.
  • a disc grinder 1 In the resulting from the drawing hand grinder is a disc grinder 1 and thereby an eccentric disc grinder having a machine head 2, to which a motor housing 3 connects, in which a drive motor, not shown, is housed.
  • the motor housing 3 is arranged and shaped so that it can serve as a handle. With the other hand you can hold the machine head 2 and hold down against a workpiece to be ground.
  • the machine head 2 contains a driven by the drive motor forth drive unit having a perpendicular to the motor shaft extending and driven via an unillustrated reversing gear from the motor shaft ago drive shaft, which is indicated by its axis line 4.
  • the drive shaft is operatively connected to an eccentric part 5 which is arranged with its axis line 6 eccentric to drive shaft axis line 4 and, depending on the user-set operating mode, revolves around the drive shaft axis line 4 and / or rotates about its eccentric part axis line 6. Further details are of no interest here. In the present context, it could also be a perform only a rotating movement disc grinder.
  • the eccentric 5 is fixedly connected to a coaxially arranged thereon holding device 7, which serves for releasably securing a sanding plate 8.
  • the holding device 7, a holding part 9, which is arranged in the axial extension of the eccentric 5 and fixedly connected thereto by an axially extending fastening screw 10.
  • the sanding pad 8 is detachably attached to the holding device 7 and thereby to its holding part 9 by means of a plug / rotary connection device 11 to be described in detail in the manner of a bayonet connection.
  • the sanding pad 8 has a circular shape. It is made of a sanding pad upper part 12 of rigid material, in particular plastic material, and a bottom attached to the upper part 12 sanding pad base 13 made of elastically deformable material, in particular foam plastic.
  • a sanding blade-like abrasive can be exchangeably secured, with which the grinding of the respective workpiece is performed.
  • the attachment of the abrasive can be done by means of a hook and loop fastener.
  • a Klettenhaftbelag 14 is disposed on the underside of the sanding pad base 13.
  • the abrasive not shown has a cooperating with the Velcro adhesive 14 Klettenhaftbelag.
  • the illustrated sanding pad 8 is traversed by Staubabsaugötechnisch 15, which emanate from the sanding pad bottom and through which the resulting dust during grinding can be sucked off in a manner not shown. This interests in the present case not further.
  • the plug / rotary connection device 11 includes on the holding part 9 circumferentially spaced apart arranged rear engagement projections 16 which project in the radial direction and each extend a distance in the circumferential direction.
  • the Schugreifvorsprüngen 16 is in the axial direction of the sanding pad 8 away an annular surface 17 of the holding device 7 opposite, so that at each Hintergreifvorsprung 16 a limited in the axial direction 6 on the one hand by the respective rear engagement projection 16 and on the other hand by the annular surface 17
  • Clausringnut 18 annular surface
  • bayonet projections 19 are arranged in the number of Stromgreifvorsprüngen 16, which are arranged distributed in the circumferential direction at a distance from each other, extending in the circumferential direction and protrude inward in the radial direction.
  • the measured in the circumferential direction length of the bayonet projections 19 is smaller than the distance between the Schugreifvorsprüngen 16 of the holding part 9, so that the bayonet projections 19 are movable in a mounting rotational position of the grinding disc 8 between the Häifvorsprüngen 16 and in a mounting rotational position in the Generalringnuten 18th the holding device 7 are arranged and engage behind the Deutschengreifvorsprünge 16.
  • the sanding pad 8 is placed on the holding part 9 when it is mounted in the mounting rotational position in which theSchgreifvorsprünge 16 and the bayonet projections 19 are arranged so to speak on a gap to each other.
  • the bayonet projections 19 pass through the spaces between the Hintergreifvorsprüngen 16 and the Schugreifvorsprünge 16 through the spaces between the bayonet projections 19.
  • the bayonet projections 19 reach behind the Häifvorsprünge 16 so that a firm locking takes place. To remove the sanding pad 8 this is first rotated and then withdrawn in the axial direction.
  • Said annular surface 17, which limits the Operaringnuten 18 above, is arranged to be movable in the axial direction and to the rear engagement projections 16 spring-loaded.
  • the arrangement is such that the annular surface 17 is held at a removed grinding plate 8 by the spring force against a stop that the Operaringnuten 18 in the axial direction less wide than the bayonet projections 19 are thick.
  • Both the Hintergreifvorsprünge 16 and the bayonet projections 19 are arranged in a respective same, perpendicular to the axial direction plane of the holding part 9 and the sanding pad 8.
  • the bayonet projections are automatically clamped during rotation of the sanding pad 8 in its mounting rotational position, so that the sanding pad 8 holds securely on the holding part 9.
  • the annular surface 17 is formed by a relative to the holding part 9 axially movably mounted pressure ring 20.
  • the pressure ring 20 is placed on a cylindrical portion 21 of the holding part 9, which is arranged in the axial direction next to the Deutschengreifvorsprünge 16 supporting holding part section 22.
  • the spring force is applied by a plate spring 23, which has a conical shape and the pressure ring 20 back extended.
  • the plate spring 23 is supported radially inwardly against an annular shoulder 24 of the holding device 7 and radially outwardly against the pressure ring 20. It can be seen that when screwing the bayonet projections 19 into the partial ring grooves 18 when the pressure ring 20 is moved in the direction away from the rear engagement projections 16, the cone angle of the plate spring 23 is increased.
  • the Hintergreifvorsprünge 16 have, as from FIG. 4 it can be seen on its the respective partial annular groove 18 bounding inside a screwing the bayonet projections facilitating inclined surface 25, so that, so to speak, a funnel-like mouth for the engagement of the respective bayonet projection 19 results.
  • the adjoining the inclined surface 25 portion 26 of the inner side of the Schugreifvorsprünge runs flat, while in a direction transverse to the axial direction of the plane.
  • a total of three bayonet projections 19 are arranged on the sanding pad 8. Accordingly, the holding part 9 has three Deutschengreifvorsprünge 16.
  • substantially circular plug recess 27 is formed, with the sanding plate 8 is attached to the holding part 9 so that it dips into the plug recess 27.
  • the plug-in recess 27 is formed in the sanding pad upper part 12.
  • the plug-in recess 27 terminates within the grinding plate 8 on a bottom surface 28 formed by the sanding pad upper part 12.
  • the sanding pad 8 is in its fastened state all around against the holding device 7 and thereby against the pressure ring 20 formed annular surface 17 supported.
  • the sanding pad 8 on its upper side an annular around the plug recess 27 around circumferential flat surface 29, whose plane is transverse to the axial direction.
  • the bayonet projections 19 protrude radially inwards from the inner circumference of the plug-in recess 27 and are arranged in the axial direction so that the upper side 30 of the bayonet projections 19 is formed by regions of the planar surface 29 which are drawn inwards.
  • the bayonet projections 19 are flush with their upper surface 30 in the plane surface 29.
  • the bayonet projections 19 are located at the furthest possible location of the plug recess 27, so this must accordingly not extend far into the sanding pad. This allows a relatively thin construction of the sanding pad upper part 12, so that the sanding pad lower part also below the plug recess 27 of the upper part 12 has a sufficient thickness for a good nestling against the workpiece.
  • the plug recess 27 must be so deep that the Hintergreifvorsprünge 16 of the holding part 9 can get behind the bayonet projections 19.
  • a circumferentially extending gap 31 for receiving the respective Häifvorsprungs 16 is formed on the circumference of the plug recess 27 in the axial direction between each bayonet projection 19 and the bottom surface 28.
  • Each of these gaps 31 terminates in the circumferential direction at one of its ends on a rotation stop 32.
  • the sanding plate 8 mounted on the holding part 9 is rotated such that the rear grip projections 16 pass through the open ends of the gaps 31 behind the bayonet projections 19.
  • the Rotary stops 32 limit this rotation of the grinding plate 8, so that too much twisting is avoided. In principle, it would be sufficient if only such a rotation stop 32 was present in one of the gaps 31.
  • the rotational stops 32 like the bayonet projections 19, integrally formed on the sanding pad upper part 12. They form a conclusion of column 31.
  • the bayonet projections 19 have over their circumferentially extending length in the axial direction constant thickness.
  • the centering of the sanding plate 8 on the holding part 9 takes place by the centering of the bayonet projections 19 on the circumference of the holding part 9.
  • the bottom of the bayonet projections 19 receiving Operaringnuten 18 is formed by the grinding disc 8 centering peripheral surface of the holding part 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (11)

  1. Disque de meulage pour une meuleuse à disque, en particulier une meuleuse à disque excentrique qui présente un dispositif de retenue (7) réalisant en fonctionnement un mouvement rotatif et/ou giratoire entraîné par un moteur pour la fixation détachable du disque de meulage (8), dans lequel le disque de meulage (8) présente un évidement d'emboîtement (27) essentiellement circulaire, sortant de sa face supérieure (26) opposée en usage à la pièce à meuler pour l'enfoncement d'une partie de maintien (9) de la meuleuse à disque, et des saillies dépassent de la périphérie intérieure de l'évidement d'emboîtement (27) radialement vers l'intérieur, lesquelles peuvent être déplacées dans une position rotative de montage du disque de meulage (8) entre des saillies à prise arrière (16) de la partie de maintien (9) et dont les faces inférieures opposées dans le sens axial à leurs faces supérieures (30) sont en prise par derrière dans une position rotative de fixation du disque de meulage (8) par une saillie à prise arrière (16) respective, dans lequel au moins une saillie (19) présente sur son extrémité associée à la position rotative de fixation dans le sens périphérique pour une limitation de la rotation du disque de meulage (8) une butée de rotation (32) pour la saillie à prise arrière (16) respective de la partie de maintien (9), dans lequel le disque de meulage (8) présente sur sa face supérieure (26) une surface plane (29) entourant l'évidement d'emboîtement (27), sur laquelle repose une surface annulaire (17) sollicitée par ressort vers les saillies à prise arrière (16) de la partie de maintien (9) dans la position rotative de fixation, et dans lequel une épaisseur définie par une distance entre les faces supérieures (30) et les faces inférieures des saillies (19) est plus grande qu'une largeur de rainures annulaires partielles (18), qui sont présentes lorsque le disque de meulage (8) est retiré entre les saillies à prise arrière (16) et la surface annulaire (17) de la partie de maintien (9), caractérisé en ce que les faces inférieures des saillies (19) se terminent librement dans le sens périphérique des extrémités associées à la position rotative de montage des saillies (19), et en ce que le disque de meulage (8) peut être fixé au moyen d'un dispositif d'assemblage par emboîtement/rotation (11) à la manière d'un assemblage à baïonnette de manière détachable sur le dispositif de retenue (7), dans lequel les saillies formant des saillies de baïonnette (19) se coincent automatiquement lors de la rotation du disque de meulage (8) dans la position rotative de fixation entre la surface annulaire (17) et les saillies à prise arrière (16).
  2. Disque de meulage selon la revendication 1, caractérisé en ce que les saillies de baïonnette (19) présentent une épaisseur constante sur leur longueur.
  3. Disque de meulage selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que trois saillies de baïonnette (19) sont présentes.
  4. Disque de meulage selon l'une quelconque des revendications précédentes, caractérisé en ce que les faces supérieures (30) des saillies de baïonnette (19) sont formées par des zones avancées vers l'intérieur de la surface plane (29).
  5. Disque de meulage selon l'une quelconque des revendications précédentes, caractérisé en ce que l'évidement d'emboîtement (27) est si profond que les saillies à prise arrière (16) de la partie de maintien (9) peuvent parvenir derrière les saillies de baïonnette (19).
  6. Disque de meulage selon l'une quelconque des revendications précédentes, caractérisé en ce que dans le sens axial entre chaque saillie de baïonnette (19) et la surface de fond (28) délimitant l'évidement d'emboîtement (27) vers le bas de l'évidement d'emboîtement (27) est formée une fente (31) s'étendant dans le sens périphérique pour le logement de la saillie à prise arrière (16) respective de la partie de maintien (9).
  7. Disque de meulage selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il présente une face supérieure (12) contenant l'évidement d'emboîtement (27), se composant de matériau rigide et une face inférieure (13) rapportée sur la face supérieure (12) en matière plastique élastiquement déformable.
  8. Meuleuse à disque, en particulier meuleuse à disque excentrique, avec un disque de meulage selon l'une quelconque des revendications 1 à 7 et un dispositif de retenue (7) pour la fixation détachable du disque de meulage, dans lequel une partie de maintien (9) s'enfonçant à l'état fixé dans l'évidement d'emboîtement (27) du disque de meulage (8) du dispositif de retenue (7) présente des saillies à prise arrière (16) coopérant avec les saillies (19) du disque de meulage (8), dépassant dans le sens radial vers l'extérieur, à l'opposé desquelles se trouve dans le sens axial à distance du disque de meulage (8) une surface annulaire (17), et dans lequel la surface annulaire (17) est disposée de manière mobile dans le sens axial et est sollicitée élastiquement vers les saillies à prise arrière (16) et les rainures annulaires partielles (18), lorsque le disque de meulage (8) est retiré, sont moins larges que les saillies (19) du disque de meulage (8) ne sont épaisses, dans lequel pour chaque saillie à prise arrière (16) est formée une rainure annulaire partielle délimitée dans le sens axial d'une part par la saillie à prise arrière (16) et d'autre part par la surface annulaire (17) et dans lequel les saillies à prise arrière (16) présentent sur leur côté intérieur délimitant la rainure annulaire partielle (18) respective une face oblique (25) facilitant un vissage des saillies de baïonnette (19) formées par les saillies du disque de meulage (8) de sorte que la surface annulaire (17) soit repoussée lors du vissage du disque de meulage (8) par les saillies de baïonnette (19) contre la force de ressort dans le sens axial et les saillies de baïonnette (19) soient maintenues en serrage par la force de ressort dans les rainures annulaires partielles (18).
  9. Meuleuse à disque selon la revendication 8, caractérisée en ce que la surface annulaire (17) du dispositif de retenue (7) est formée par une bague de serrage (20) logée axialement mobile par rapport à la partie de maintien (9) et la force de ressort est appliquée par une rondelle-ressort (23).
  10. Meuleuse à disque selon la revendication 9, caractérisée en ce que la rondelle-ressort (23) présentant une forme conique s'étend vers la bague de serrage (20) et est en appui radialement à l'intérieur contre un décrochement annulaire (24) du dispositif de retenue (7) et radialement à l'extérieur contre la bague de serrage (20).
  11. Meuleuse à disque selon l'une quelconque des revendications 8 à 10, caractérisée en ce que la partie de maintien (9) présente trois saillies à prise arrière (16).
EP06023804A 2005-12-12 2006-11-16 Disque de ponçage avec dispositif de fermeture et de blocage rapide et ponceuse à disque avec une telle disque Active EP1795301B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09000740A EP2052813B1 (fr) 2005-12-12 2006-11-16 Polisseuse et plateau de meule pour une polisseuse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510060514 DE102005060514A1 (de) 2005-12-12 2005-12-12 Tellerschleifer sowie Schleifteller für einen Tellerschleifer

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP09000740A Division EP2052813B1 (fr) 2005-12-12 2006-11-16 Polisseuse et plateau de meule pour une polisseuse

Publications (2)

Publication Number Publication Date
EP1795301A1 EP1795301A1 (fr) 2007-06-13
EP1795301B1 true EP1795301B1 (fr) 2009-03-11

Family

ID=37866281

Family Applications (2)

Application Number Title Priority Date Filing Date
EP09000740A Active EP2052813B1 (fr) 2005-12-12 2006-11-16 Polisseuse et plateau de meule pour une polisseuse
EP06023804A Active EP1795301B1 (fr) 2005-12-12 2006-11-16 Disque de ponçage avec dispositif de fermeture et de blocage rapide et ponceuse à disque avec une telle disque

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP09000740A Active EP2052813B1 (fr) 2005-12-12 2006-11-16 Polisseuse et plateau de meule pour une polisseuse

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EP (2) EP2052813B1 (fr)
DE (2) DE102005060514A1 (fr)

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DE202007014470U1 (de) * 2007-10-16 2008-02-07 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co. Kg Schleifrad für eine spanabhebende Bearbeitung von Gegenständen, insbesondere von Steinen, Ziegeln o.dgl., oder Radkörper oder Schleifring oder Verschluss-Stück für ein solches Schleifrad
DE202010010653U1 (de) 2010-07-26 2011-11-15 Hans Lingl Anlagenbau Und Verfahrenstechnik Gmbh & Co. Kg Maschine mit Werkzeug-Schnellwechselsystem
CN102814793B (zh) * 2011-06-09 2015-08-19 苏州宝时得电动工具有限公司 动力工具及应用于该动力工具的工作头和转接器
CN102814790A (zh) * 2011-06-09 2012-12-12 苏州宝时得电动工具有限公司 动力工具及应用于该动力工具的工作头和转接器
CN104070506A (zh) * 2013-03-27 2014-10-01 苏州宝时得电动工具有限公司 多功能机
NL2016421B1 (nl) 2016-03-11 2017-10-02 Blastrac B V Dubbelzijdige schuurschijf met snelwisselsysteem.
ITUA20161640A1 (it) * 2016-03-14 2017-09-14 Costa Levigatrici Spa Platorello e portaplatorello ad aggancio rapido
DK178917B1 (da) 2016-05-31 2017-05-22 Kadicma Aps Bajonetkobling samt bearbejdningsenhed med sådan bajonetkobling
WO2019123310A1 (fr) * 2017-12-20 2019-06-27 Fabrica Machinale S.R.L. Procédé et appareil permettant de réaliser le remplacement d'un élément abrasif dans une machine permettant d'usiner des surfaces
DE102018106347A1 (de) * 2018-03-19 2019-09-19 Boeck Gmbh Verbindungsvorrichtung
EP4063069B1 (fr) 2021-03-23 2022-12-07 Andrea Valentini Tampon de support en forme de plaque adapté pour une fixation amovible à un outil de polissage ou de sablage à main
FR3126193B1 (fr) 2021-08-20 2023-08-11 Gilbert Constructions Mec ensemble pour le montage et démontage d’un outil tournant à une broche d’entraînement en rotation d’une machine-outil
CN114274044B (zh) * 2021-12-31 2023-12-26 厦门创云精智机械设备股份有限公司 一种磨轮及使用该磨轮的台式磨床
CN115781516B (zh) * 2023-02-07 2023-04-25 强信机械科技(莱州)有限公司 五轴数控磨削设备

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DE10017457A1 (de) * 2000-04-07 2001-10-11 Bosch Gmbh Robert Schleifmaschinenwerkzeugaufnahme
DE10017458A1 (de) 2000-04-07 2001-10-18 Bosch Gmbh Robert Schleifmaschinenwerkzeugaufnahme
DE10030586A1 (de) * 2000-06-21 2002-01-10 Bruno Schmitz Schleifmittelwer Werkzeug
DE20205495U1 (de) 2001-06-21 2002-08-01 Bruno Schmitz Schleifmittelwerk GmbH, 42897 Remscheid Befestigungseinrichtung, Spannsystem und zugeordnetes Werkzeug
DE102004001580B3 (de) * 2004-01-10 2005-06-23 Festool Gmbh Vorrichtung zum Verbinden eines Schleifwerkzeugs mit einer Werkzeugmaschine

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Also Published As

Publication number Publication date
DE502006003079D1 (de) 2009-04-23
EP2052813B1 (fr) 2012-05-16
DE102005060514A1 (de) 2007-06-14
EP1795301A1 (fr) 2007-06-13
EP2052813A1 (fr) 2009-04-29

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