JP2009508733A - Bicycle fork with integrated hydraulic brake - Google Patents

Bicycle fork with integrated hydraulic brake Download PDF

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Publication number
JP2009508733A
JP2009508733A JP2008530721A JP2008530721A JP2009508733A JP 2009508733 A JP2009508733 A JP 2009508733A JP 2008530721 A JP2008530721 A JP 2008530721A JP 2008530721 A JP2008530721 A JP 2008530721A JP 2009508733 A JP2009508733 A JP 2009508733A
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JP
Japan
Prior art keywords
fork
leg
support
bicycle fork
brake
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Granted
Application number
JP2008530721A
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Japanese (ja)
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JP5102768B2 (en
Inventor
レオナルド・フィオラヴァンティ
Original Assignee
フィオラヴァンティ・ソシエタ・ア・レスポンサビリタ・リミタータFIORAVANTI S.r.l.
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Publication date
Priority to ITTO2005U000137 priority Critical
Priority to ITTO20050137 priority patent/ITTO20050137U1/en
Application filed by フィオラヴァンティ・ソシエタ・ア・レスポンサビリタ・リミタータFIORAVANTI S.r.l. filed Critical フィオラヴァンティ・ソシエタ・ア・レスポンサビリタ・リミタータFIORAVANTI S.r.l.
Priority to PCT/IB2006/053315 priority patent/WO2007031967A2/en
Publication of JP2009508733A publication Critical patent/JP2009508733A/en
Application granted granted Critical
Publication of JP5102768B2 publication Critical patent/JP5102768B2/en
Expired - Fee Related legal-status Critical Current
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62LBRAKES SPECIALLY ADAPTED FOR CYCLES
    • B62L1/00Brakes; Arrangements thereof
    • B62L1/02Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements
    • B62L1/06Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged
    • B62L1/10Brakes; Arrangements thereof in which cycle wheels are engaged by brake elements the wheel rim being engaged by the elements moving substantially parallel to the wheel axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62KCYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K21/00Steering devices
    • B62K21/02Front wheel forks or equivalent, e.g. single tine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/228Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a separate actuating member for each side
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D55/00Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D2055/0004Parts or details of disc brakes
    • F16D2055/0008Brake supports
    • F16D2055/0012Brake supports integral with vehicle suspension
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2121/00Type of actuator operation force
    • F16D2121/02Fluid pressure
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2127/00Auxiliary mechanisms
    • F16D2127/08Self-amplifying or de-amplifying mechanisms
    • F16D2127/10Self-amplifying or de-amplifying mechanisms having wedging elements

Abstract

  The fork 10 includes a pair of legs 16 configured to support the rotation of the wheel 18 and a hydraulic brake device including a pair of hydraulic brake actuators 26. Each brake actuator 26 includes: Attached to each leg portion 16 is provided with a friction member 38. Each brake actuator 26 is disposed so as to press each friction member 38 against the brake surface 20a of the wheel 18 so as to apply a braking force. According to the present invention, each leg 16 has a side abutment surface 24, a lower support surface 50, and a front stop surface 52 on the side facing the wheel 18, and each hydraulic actuator 26 is The outer surface 28 disposed with respect to the side contact surface 24, the lower surface 32 supported by the lower support surface 50, the front surface 34 held in the longitudinal direction by the front stop surface 52, and the friction And an inner surface 30 to which a member 38 is attached.

Description

  The present invention relates to a bicycle fork with an integrated hydraulic brake as specified in the premise of claim 1.

  A bicycle front fork of the kind described above is known from WO 901470. According to this known solution, the fork is provided with a hydraulic brake with a piston / cylinder unit, and the cylinder is fixed in a lateral through hole provided in one of the fork legs, and the piston Is slidably disposed within the cylinder and is controlled by the handlebar brake lever through a hydraulic connection line extending through the handlebar and fork steer tube and out of the fork head. The piston / cylinder unit is attached to the upper end of the leg at substantially the same height as the sidewall of the wheel rim. The hydraulic piston is pressed against the rim sidewall when the brake is actuated by the user to apply the necessary braking force on its lateral inner side, i.e. on the side facing the rim sidewall. A friction member is provided.

The idea of providing a hydraulic brake that is arranged to apply the braking force directly to the rim sidewall is more numerous than the conventional hydraulic disc brake, where the brake caliper acts on the brake disc fixed to the wheel hub. It is an advantage. First, since a tightening force is applied by a longer lever arm, a stronger braking action can be obtained even when a similar tightening force is applied. Further, the braking action is balanced on the wheel rim sidewalls, thereby acting on the plane of symmetry with respect to the wheel face rather than acting on the disk located outside the wheel face. A further advantage is that the overall dimensions are reduced compared to conventional hydraulic disc brakes, in particular due to the elimination of the disc.
International Publication No. WO901470

  However, the solution known in the aforementioned patent application has the disadvantage that it is necessary to form a through-hole with a large diameter in the fork leg. As a result, the mechanical strength of the fork is reduced, and if these through holes are provided in the most stressed portion of the leg, it becomes more serious. Furthermore, according to this known solution, the end of the hydraulic connection line on the wheel side goes out of the fork, which impairs the aesthetic appearance of the fork.

  Accordingly, it is an object of the present invention to provide a bicycle fork with an integrated hydraulic brake that is not affected by the disadvantages of the prior art described above.

  This object is achieved in a complete form by a fork according to the invention having the features set forth in the characterizing part of claim 1.

  The features and advantages of the present invention will become apparent from the following detailed description, given by way of non-limiting example only with reference to the accompanying drawings.

  In the following description and claims, terms such as “longitudinal” and “lateral”, “inner” and “outer”, “front” and “rear”, “horizontal” and “vertical” refer to forks. It is intended to be used while attached to a bicycle.

  Referring to the figures, a bicycle fork according to the present invention, in this case a front fork, is generally indicated by the numeral 10. The fork 10 is joined to the head 14 by a known method, a steer tube 14 extending upward from the head 12 and inserted into a head tube (not shown) of the bicycle frame, and the head 14 at the upper end. A pair of leg portions 16 (only one of which is shown in the drawing, but the other leg portion is the same as that shown in the figure) can be formed integrally with the head. The hub (not shown) of the bicycle wheel 18 is attached to the lower end (not shown) of the leg portion. The wheel 18 includes a rim 20 and a tire 22 attached to the rim 20 by a known method. The rim 20 includes a pair of sidewalls that are substantially vertical or slightly inclined toward each other toward the center of the wheel 18 and each have a braking surface 20a. Have.

  As can be seen in particular in FIGS. 1 and 3, the substantially flat abutment surface 24, which is arranged in a plane substantially perpendicular or at least substantially parallel to the corresponding brake surface 20a of the rim 20, is provided for each leg. 16 is provided inside. The contact surface 24 is preferably formed directly by the legs 16. Each flat abutment surface 24 is arranged at a height position facing the corresponding brake surface 20a and is preferably, but not essential, the front surface of the wheel, i.e. close to each other in the direction of driving the bicycle. Is inclined by an angle α with respect to a vertical plane π that is parallel to the plane, that is, with respect to the symmetry plane of the fork (FIG. 3). The function of the angle α will be described in the following part of this description, but is preferably in the range of 0 to 5 degrees, for example, 3 degrees.

  A pair of hydraulic actuators 26 constituting the hydraulic brake actuating member are respectively attached to the contact surfaces 24. Such a hydraulic actuator 26 is a component well known to those skilled in the art and will not be described in detail unless these components are essential to an understanding of the present invention.

  Each hydraulic actuator 26 has a pair of outer and inner longitudinal vertical flat surfaces 28 and 30, a lower horizontal flat surface 32, and a pair of front and rear lateral vertical flat surfaces 34 and 36. It is formed as a substantially parallelepiped. A known type of friction member 38 configured to be pressed against the corresponding brake surface 20 a of the rim 20 when the brake is operated is attached to the inner vertical surface 30 of each hydraulic actuator 26.

  In the embodiment shown in the drawings, a pair of support structures 40, which are formed as separate parts from the legs 16, but can also be formed integrally with the legs themselves, provide a hydraulic actuator 26 in the vertical direction. Is further provided for supporting and holding in the longitudinal direction.

  Each support structure 40 includes a lower support member 42 and a pair of front and rear vertical stop members 44 and 46. In the illustrated embodiment, the lower support member 42 and the front vertical stop member 44 comprise a single L-shaped part that is preferably removably secured to the leg 16 by, for example, a screw 48. However, the rear vertical stop member 46 is joined to the end of the lower support member 42 opposite to the front vertical stop member 44.

  The lower support member 42 of each support structure 40 forms a substantially horizontal flat abutment surface 50 on which each hydraulic actuator 26 is mounted with its lower horizontal flat surface 32. The vertical stop members 44 and 46 form vertical stop surfaces 52 and 54 that hold the horizontal vertical flat surfaces 34 and 36 of the hydraulic actuators 26 in the longitudinal direction.

  Accordingly, each hydraulic actuator 26 is placed on the contact surface 50 of the support structure 40 at the bottom, and supported by the contact surface 24 of each leg 16 on the outside, and further in the longitudinal direction. Retained by the stop surfaces 52 and 54 of the support structure 40 (particularly by the gap between the corresponding pair of front surfaces 34 and 52 and the rear surfaces 36 and 54, as shown in FIGS. 2 and 3). It can move freely to some extent.

  In order to hold each hydraulic actuator 26 on the inner side in the lateral direction, for example, it is provided in a longitudinal groove formed substantially at the center of the lower flat surface 32 of the actuator 26 and an abutting surface 50 of the lower support member 42. A straight guide coupling (not shown) formed between the actuator 26 and the lower support member 42 is formed by a corresponding guide projection that engages the longitudinal groove of Is possible. By using such a type of coupling between the hydraulic actuator 26 and the support structure 40, the friction member 38 is pressed against the brake surface 20a of the rim 20 during the operation of the brake, whereby the friction member Can be advantageously guided in the longitudinal direction of the actuator as it becomes easier to be pulled forward. Further, instead of the straight guide type coupling, it is also possible to provide a guide edge that protrudes upward and extends along the lateral inner side of the contact surface 50.

  Advantageously, the rear vertical stop member 46 allows a vertical position (shown as a solid line in FIG. 1) that serves as a rear stop for the hydraulic actuator 26 and allows the hydraulic actuator 26 to retract from the support structure 40. It is mounted so as to be pivotable about a longitudinal axis formed by a pin 56 so that it can move between a horizontal or inclined position (shown by a dotted line in FIG. 1). This additional feature allows the actuator 26 to be easily removed for maintenance work.

  As described above, the contact surface 24 is preferably formed directly by the legs 16. Each abutment surface 24 can also be formed by a further part of each support structure 40 or a separate further support member, and between each leg 16 and each hydraulic actuator 26. It is also possible to intervene. Further, the contact surfaces 24 are preferably inclined with respect to the vertical surface in the longitudinal direction so as to approach each other in the front. Accordingly, it is possible to obtain an advantageous self-tightening effect of the friction member 38 with respect to the rim 20, and it is possible to improve the braking action even when the pressure applied to the friction member 38 is the same. Actually, when the friction member 38 comes into contact with the brake surface 20a of the rim 20 during the operation of the brake, the friction member is easily pulled forward by the rim itself as described above. Since the contact surface 24 is inclined, the friction member 38 moves laterally toward the brake surface 20a of the rim 20 as the friction member 38 advances in the longitudinal direction, so that the effective braking force applied is improved. To do.

  Finally, as far as the brake actuation system is concerned, it is not shown in the drawing because it is a known type. In order to carry out the present invention, it is necessary to say that the operation system includes a control hydraulic actuator corresponding to a brake lever attached to the handlebar, and a control hydraulic actuator in two brake hydraulic actuators 26. And a pair of hydraulic connection lines to be connected. For aesthetic reasons, the hydraulic connection line extends in the handlebar and fork over its entire length.

  Further, the end of the connection line on the brake side may protrude from the head of the fork or the upper end of the leg toward the inside of the fork. Although this second solution is less aesthetic than the first solution, especially when viewed from the side, the connection line is not very visible or visible from the outside at all. The fork appearance will not be greatly affected. In this case, in order to better conceal the hydraulic connection lines, it is possible to at least partly accommodate these lines in corresponding grooves formed on the inside of the legs.

  As can be seen in view of the foregoing explanation, the hydraulic actuator is no longer inserted into the hole provided in the leg of the fork, but is simply arranged with respect to the surface of the leg itself. A fork provided with such a hydraulic brake has the same mechanical strength as a fork having the same shape but no hydraulic brake. Furthermore, by placing the entire hydraulic actuator inside the fork, the hydraulic connection line can be extended entirely into the fork, or at most the end on the brake side is inward from the head of the fork. It does not affect the aesthetic appearance of the fork.

  Of course, the details of the embodiments and structures may be varied widely from what has been described and shown only as non-limiting examples without changing the principles of the invention.

  For example, while the present invention has been described with reference to an embodiment relating to a front fork, it is clear that the present invention is equally applicable to a rear fork. In that case, the contact surface to which the two hydraulic actuators for brakes must be attached is provided inside the back hawk of the frame.

1 is a front view of a bicycle front fork according to a preferred embodiment of the present invention. It is a side view of the fork of FIG. FIG. 3 is a view from below of the fork of FIG. 1 taken along line 3-3 of FIG. It is a detailed perspective view of the hydraulic actuator for brakes of the fork of FIG.

Claims (15)

  1. A pair of legs (16) configured to support rotation of the bicycle wheel (18);
    A hydraulic brake device comprising a pair of hydraulic brake actuators (26);
    Each brake actuator (26) is attached to each leg (16) and includes a friction member (38), and each brake surface (20a) of the rim (20) of the wheel (18) is provided. A bicycle fork (10) operable to press each friction member (38) against)
    Each leg (16) has, on the side facing the wheel (18), a first lateral contact surface (24), a first lower support surface (50), and a third front stop surface ( 52), and
    Each brake actuator (26) is supported by a first outer surface (28) disposed with respect to the first side contact surface (24) and the second lower support surface (50). The second lower surface (32), the third front surface (34) held in the longitudinal direction in the driving direction by the third front stop surface (52), and the friction member (38) are attached. A bicycle fork having four inner surfaces (30).
  2.   The bicycle fork of claim 1, wherein the first surface (24) is directly formed by the leg (16).
  3.   The bicycle fork according to claim 1 or 2, wherein the second surface (50) is directly formed by the leg (16).
  4.   It further includes a pair of support structures (40) that are separate from the legs (16) and fixed to the legs (16), respectively. The bicycle fork according to claim 1 or 2, wherein the bicycle fork forms the second and third surfaces (50, 52).
  5.   Each support structure (40) further forms a fourth rear stop surface (54), and each brake actuator (26) is in a direction opposite to the driving direction by the fourth rear stop surface (54). 5. The bicycle fork of claim 4, further comprising a fifth rear surface (36) retained longitudinally at.
  6.   Each support structure (40) includes a lower support member (42) having the second surface (24) and a first front vertical stop member (44) having the third surface (52). 6. A bicycle fork according to claim 4 or 5, comprising an L-shaped part formed.
  7.   Each support structure (40) is joined to the L-shaped part (42, 44) on the opposite side of the first member (44) and has a fourth surface (54). 7. Bicycle fork according to claim 6, when dependent on claim 5, further comprising a rear vertical stop member (46).
  8.   Bicycle fork according to any one of claims 4 to 7, wherein each support structure (40) is removably (48) fixed to each leg (16).
  9.   The second member (46) includes a first position where the fourth surface (54) of the support structure (40) holds the brake actuators (26) in the longitudinal direction, and the fourth member (46). The L-shaped surface (54) so that it can move between a second position allowing longitudinal movement of each brake actuator (26) in a direction opposite to the driving direction. 9. Bicycle fork according to claim 7 or 8, wherein said bicycle fork is mounted pivotably about a longitudinal axis (56) with respect to the shaped part (42, 44).
  10.   When attaching the wheel (18) to the fork, each first surface (24) is arranged at a height position facing the corresponding brake surface (20a). Bicycle fork as described.
  11.   Bicycle according to any one of the preceding claims, wherein each first surface (24) is inclined by (α) with respect to a symmetrical vertical plane of the fork so as to approach each other in the driving direction. fork.
  12.   The second surface (32) of each brake actuator (26) has a longitudinal groove, and the second surface (50) of each leg (16) is the longitudinal groove. The bicycle fork according to any one of the preceding claims, wherein a guide protrusion is formed to engage the guide fork.
  13.   Each leg (16) further comprises a guide edge for holding each brake actuator laterally inwardly in cooperation with the fourth surface (30) of each brake actuator (26). A bicycle fork according to any one of the preceding claims.
  14.   The pair of contact members according to claim 1, further comprising a pair of abutting members interposed between each leg (16) and each brake actuator (26) and forming the first surface (24). Bicycle fork.
  15.   The leg according to any one of the preceding claims, wherein the leg (16) has on its inside a groove suitable for at least partially receiving the supply pipe of the brake actuator (26). Bicycle fork as described.
JP2008530721A 2005-09-16 2006-09-15 Bicycle fork with hydraulic brake Expired - Fee Related JP5102768B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ITTO2005U000137 2005-09-16
ITTO20050137 ITTO20050137U1 (en) 2005-09-16 2005-09-16 bicycle fork with integrated hydraulic brake.
PCT/IB2006/053315 WO2007031967A2 (en) 2005-09-16 2006-09-15 Bicycle fork with integrated hydraulic brake

Publications (2)

Publication Number Publication Date
JP2009508733A true JP2009508733A (en) 2009-03-05
JP5102768B2 JP5102768B2 (en) 2012-12-19

Family

ID=37865364

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2008530721A Expired - Fee Related JP5102768B2 (en) 2005-09-16 2006-09-15 Bicycle fork with hydraulic brake

Country Status (4)

Country Link
EP (1) EP1924490A2 (en)
JP (1) JP5102768B2 (en)
IT (1) ITTO20050137U1 (en)
WO (1) WO2007031967A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202011103814U1 (en) * 2011-07-29 2012-11-15 Canyon Bicycles Gmbh Twin Bridges bicycle fork
US9457867B2 (en) 2013-03-14 2016-10-04 Specialized Bicycle Components, Inc. Bicycle brake assembly
US9701362B2 (en) * 2015-02-27 2017-07-11 Shimano Inc. Bicycle brake device
US9764794B2 (en) 2015-02-27 2017-09-19 Shimano Inc. Bicycle brake device and bicycle rim brake device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4836834A (en) * 1971-09-09 1973-05-31
US4585094A (en) * 1983-10-05 1986-04-29 Gustav Magenwirth Gmbh & Co. Hydraulic rim brake for bicycles

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655699A1 (en) * 1976-12-09 1978-06-15 Weinmann & Co Kg Two-wheel rim brake
CH618931A5 (en) * 1977-08-22 1980-08-29 Paul J Zuppiger Hydraulically controlled braking device for cycles and mopeds
DE3320532A1 (en) * 1983-06-07 1984-12-13 Weinmann & Co Kg Holder for a rim brake for a cycle
DE3804581C2 (en) * 1988-02-13 1994-05-05 Magenwirth Gmbh Co Gustav Hydraulic rim brake for bicycles
US4921081A (en) * 1988-12-22 1990-05-01 Autra-Bike Co., Inc. Hydraulic brake apparatus for bicycles
WO1990013470A1 (en) * 1989-05-03 1990-11-15 Ueli Eser Hydraulic rim brake on a bicycle
DE4232598C2 (en) * 1992-09-29 1998-10-08 Magenwirth Gmbh Co Gustav Hydraulic rim brake for bicycles
DE19526496C2 (en) * 1995-07-20 1998-06-04 Dietrich Gerhard Ellsaeser Brake carrier for a bicycle
DE19737050C1 (en) * 1997-08-26 1999-03-11 Otto Schrade Hydraulic brake device for vehicles with pedal crank drive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4836834A (en) * 1971-09-09 1973-05-31
US4585094A (en) * 1983-10-05 1986-04-29 Gustav Magenwirth Gmbh & Co. Hydraulic rim brake for bicycles

Also Published As

Publication number Publication date
EP1924490A2 (en) 2008-05-28
ITTO20050137U1 (en) 2007-03-17
WO2007031967A2 (en) 2007-03-22
WO2007031967A3 (en) 2007-07-19
JP5102768B2 (en) 2012-12-19

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