WO1990000428A1 - Patins a roulettes et planches a roulettes a suspension dirigeable - Google Patents

Patins a roulettes et planches a roulettes a suspension dirigeable Download PDF

Info

Publication number
WO1990000428A1
WO1990000428A1 PCT/GB1989/000807 GB8900807W WO9000428A1 WO 1990000428 A1 WO1990000428 A1 WO 1990000428A1 GB 8900807 W GB8900807 W GB 8900807W WO 9000428 A1 WO9000428 A1 WO 9000428A1
Authority
WO
WIPO (PCT)
Prior art keywords
castor
suspension system
resilient
castors
support member
Prior art date
Application number
PCT/GB1989/000807
Other languages
English (en)
Inventor
Thomas Drovandi
Original Assignee
Thomas Drovandi
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB888816590A external-priority patent/GB8816590D0/en
Priority claimed from GB888826386A external-priority patent/GB8826386D0/en
Application filed by Thomas Drovandi filed Critical Thomas Drovandi
Publication of WO1990000428A1 publication Critical patent/WO1990000428A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/0046—Roller skates; Skate-boards with shock absorption or suspension system
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C17/00—Roller skates; Skate-boards
    • A63C17/04—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs
    • A63C17/06—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs single-track type
    • A63C17/061—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs single-track type with relative movement of sub-parts on the chassis
    • A63C17/062—Roller skates; Skate-boards with wheels arranged otherwise than in two pairs single-track type with relative movement of sub-parts on the chassis with a pivotal frame or cradle around transversal axis for relative movements of the wheels

Definitions

  • This invention relates to steerable roller skates and skateboards, and to suspension systems therefor.
  • a roller skate is an article adapted to be worn on the foot of a skate user, either by being clamped to the underside of an item of footwear or by being constructed integrally with an item of footwear.
  • a conventional roller skate has four rollers on a pair of longitudinally separated transverse axles by which the user can stand on the skate and roll across a suitable surface such as paving. Roller skates are generally utilised in pairs, one on each foot of a skate user.
  • a conventional skateboard is generally similar to single roller skate, but on a larger scale, and with a generally flat upper surface constituted by a board on which the user stands without attachment between the user's footwear (if any) and the board. Skateboards are normally used singly.
  • a person using one or two roller skates, or a single skateboard will henceforth be referred to simply as a 'skate user ' .
  • the skate user steers by leaning to the side to which the user wishes to turn.
  • the user's lean causes a lateral turning movement to be applied between the upper part of the roller skate or skateboard and the roller axles.
  • the axles are each coupled to the upper part of the roller skate or skateboard for pivoting about respective axes each aligned in a longitudinal vertical plane and slightly off horizontal (referenced to a horizontal plane on which the roller skate or skateboard is standing).
  • skate user's lateral lean translates to a sideways tilt of the upper part of the roller skate(s) or skateboard with respect to the roller axles, and as a consequence of the near-horizontal but non-horizontal longitudinal pivoting of the roller axles, the sideways tilt causes to the roller axles to move out of parallelism (producing straight-ahead steering) to convergent alignment, with convergence on the side to which the skate user is leaning and hence steering towards the side to which the skate user is leaning.
  • the skate user leans into the curve when steering by lateral tilting of the user's body, which conveniently also balances the centripetal acceleration induced by cornering. This procedure is henceforth termed 'lean steering' .
  • Skateboards and roller skates (especially those integral with items of footwear) have a normal direction of forward movement. Notwithstanding that movement in a direction opposite to that of the normal direction of forward movement may be possible, in the following description of the invention normal forward movement is assumed (unless specifically stated otherwise) and references to 'forward', 'front', 'leading', 'near', 'back', and 'trailing' in respect of a roller skate or skateboard, or a suspension system therefor, are to be construed accordingly.
  • references to 'horizontal', 'vertical', and 'upright' in respect of a roller skate or skateboard, or a suspension system therefor assume that the roller skate, skateboard, or suspension system is upright while resting on a horizontal planar surface, and such references are to be construed accordingly.
  • a suspension system for a roller skate or skateboard comprising a support member having a front end and a rear end, a front pivot adjacent the front end of said support member, a rear pivot adjacent the rear end of said support member, said front pivot and said rear pivot each providing a respective pivot axis which is substantially vertical, a front castor trailing pivoted f on said front pivot for substantially horizontal bi-directional swivelling movement about a notional horizontal line joining the two said pivots and rearwards of said front pivot, a rear castor leadingly pivoted on said rear pivot for substantially horizontal bi-directional swivelling movement about said notional horizontal line joining the two said pivots and forwards of said rear pivot, said front castor rotatably mounting a front wheel and said rear castor rotatably mounting a rear wheel, each said wheel being rotatable about a respective axis which is substantially horizontal and substantially normal to said notional horizontal line when the respective castor is substantially aligned therewith
  • both said castors are resiliently restrained to a straight-ahead direction of steering of the suspension system, but upon the imposition of a lateral force on said wheels, each said castor swivels about its respective pivot to turn said wheels to steer towards the direction from which the lateral force is applied; imposition of a lateral force from a given side of the suspension system causes each said castor to swivel towards the opposite side against the restraint of the resilient restraint means, with the trailing of the front castor and the leading of the rear castor causing swivelling of both said castors in mutually opposite directions about their respective pivots to steer the suspension system in a turn about a point on said given side.
  • the lateral force may be applied to the suspension system from a given side of the suspension system while the suspension system is supporting a vertical load and the wheels are running on a substantially horizontal surface by tilting the suspension system and hence also both castor pivots sideways towards that given side; the longitudinal offsets between the points of contact of the wheels with the surface and the respective pivots of the respective castors react with the lateral offset of the vertical load from the points of contact of the wheels with the surface to cause swivelling of the castors as aforesaid and thereby produce the function of lean steering.
  • Said resilient restraint means may comprise a first resilient coupling between said front castor and said support member, and a second resilient coupling between said rear castor and said support member, said first and second resilient coupling each applying a substantially zero nett swivelling force to the respective castor when the respective castor is substantially aligned with said notional horizontal line joining the two said pivots but applying a non-zero nett swivelling force to the respective castor in a direction tending to restore the respective castor to alignment with said notional horizontal line when the respective castor is swivelled out of such alignment, whereby said resilient couplings resiliently restrain said castors from steering the suspension system into a turn.
  • said resilient restraint means may comprise a resilient interconnection mutually connecting said front castor with said rear castor such as to provide a substantially zero nett swivelling force on each of said castors when both of said castors are substantially aligned with the notional horizontal line joining the two said pivots but providing a mutual swivelling force tending to restore said castors to such alignment when swivelled out of such alignment and tending to restrain the castors from swivelling out of such alignment whereby said resilient interconnection resiliently restrains said castors from steering the suspension system into a turn.
  • Said resilient interconnection may comprise a resiliently bendable elongate member substantially rigidly coupled at each end to a respective one of the castors such that swivelling of the castors causes bending of said elongate member.
  • Said resilient interconnection may alternatively comprise a rigid rearward extension of the front castor and a rigid forward extension of the rear castor, together with a resilient clamp resiliently clamping both said extensions to provide said resilient restraint.
  • Said resilient clamp may comprise resilient material disposed on either side of said extensions and placed in lateral compression by substantially rigid capping members mutually transversely secured by substantially inextensible fasteners.
  • said resilient restraint means may comprise a combination of a respective resilient coupling between each said castor and said support member, and a resilient interconnection mutually connecting the two said castors.
  • the two resilient couplings and the resilient interconnection may be constituted by a single elongate member which is resiliently bendable, the elongate member being transversely linked at each end thereof to the support member, the elongate member also being transversely linked to each said castor at a respective point on each castor remote from the respective pivot, the points of transverse linkage of the elongate member to the castors being mutually displaced along the elongate member and intermediate the ends of the elongate member.
  • each of said castors may be constructed or adapted such that one or more points on each castor and displaced from the respective pivot slides on the underside of the support member whereby to obviate or mitigate skewing forces on the respective pivots in use of suspension system.
  • the normal two rollers per axle will constrain the roller axles to remain parallel to the ground or other surface upon which the skate user is travelling normally, whether the user is travelling straight ahead or turning without lifting the wheels off the ground.
  • the roller axles tilt with respect to the ground when lean steering, and the wheels consequently tilt with respect to the ground during turns. Therefore to facilitate lean steering, it is preferred in all forms of the present invention that the wheel treads or other ground-contacting surfaces of the wheels be transversely rounded such that the mid-line of the tread or other ground-contacting surface has a maximum diameter about the wheel axle, and 1 progressively lesser diameters on either side of the
  • a roller skate comprising a 6 suspension system according to the first aspect of the 7 invention together with an item of footwear having a 8 sole and a heel, the item of footwear being secured to 9 and supported by the support members of said suspension 0 system, with the front castor disposed under the sole 1 and the rear castor disposed under the heel.
  • a roller skate comprising a 5 suspension system according to the first aspect of the 6 invention, said suspension system being integral with 7 an item of footwear, the support member of said 8 suspension system constituting at least part of sole 9 and heel components of said item of footwear, the front 0 castor being disposed under the sole component and the 1 rear castor being disposed under the heel component.
  • a skateboard comprising a suspension 5 system according to the first aspect of the present invention, the support member of said suspension system comprising an elongate foot-supporting board dimensioned to support the two feet of a skate user with one said foot in front of the other said foot.
  • Fig. 1 is a longitudinal mid-line vertical section of a first embodiment of the inventions, taken on the line line I-I in Fig. 5;
  • Fig. 2 is a transverse vertical section of the first embodiment, taken on the line II-II in Fig 5;
  • Fig. 3 is a side elevation of the first embodiment, in combination with an item of footwear;
  • Fig. 4 is a transverse vertical section of the first embodiment, taken on the line IV-IV in Fig. 5;
  • Fig. 5 is an underside view of the first embodiment;
  • Fig. 6 is a simplified schematic underside view corresponding to Fig. 5, and showing the first embodiment in a straight-ahead steering configuration;
  • Fig. 7 is the simplified schematic underside view of Fig. 6 but modified to show the first embodiment in a left-turn steering configuration;
  • Fig. 8 is the simplified schematic underside view of Fig. 6 but modified to show the first embodiment in a right-
  • FIG. 9 is a schematic side elevation of a second embodiment of the invention
  • Fig. 10 is a simplified schematic underside view of the second embodiment
  • Fig. 11 is the simplified schematic underside view of Fig. 10 but modified " to show a left-turn steering configuration
  • Fig. 12 is the simplified schematic underside view of Fig. 10 but modified to show a right- urn steering configuration
  • ' Fig. 13 is a simplified schematic side elevation of a third embodiment
  • Fig. 14 is a simplified schematic underside view of the third embodiment
  • Fig. 15 is a simplified schematic side . elevation of a fourth embodiment
  • Fig. 16 is an end elevation of the fourth embodiment
  • Fig. 17 is an underside view of the fourth embodiment
  • Fig. 18 is a simplified schematic underside view of a fifth embodiment.
  • Fig. l this is a longitudinal mid-line vertical section of a suspension system 10 in accordance with the invention.
  • the suspension system 10 comprises a rigid support member 12 generally in the form of combined sole and heel components of an item of footwear, such as a boot.
  • the toe region of the support member 12 has a vertical hole 14, and the heel region of the support member 12 has a vertical hole 16.
  • the holes 14 and 16 are internally threaded.
  • a front castor 18 is bolted to the hole 14 such that
  • a rear castor 20 is bolted to the hole 16 such that the castor 20 can swivel horizontally in a leading position ahead of the heel region of the support member 12, with the bolted connection to the hole 16 acting as a vertical pivot for the rear castor 20.
  • the front castor 18 includes a front axle 22 which is horizontal when the suspension system 10 is upright.
  • the front axle 22 carries a rotatably mounted front wheel 24 having a generally toroidal profile and laterally curved tread, as shown in Fig. 2.
  • the rear castor 20 includes a rear axle 26 which is horizontal when the suspension system 10 is upright.
  • the rear axle 26 carries a rotatably mounted rear wheel 28 having a generally toroidal profile and laterally curved tread, similar to that of the front wheel 24.
  • Swivelling of the castors 18 and 20 is resiliently restrained by a resilient interconnection 30 mutually connecting the two castors.
  • the interconnection 30 comprises a rearward extension 32 on the front castor 18, and a forward extension 34 on the rear castor 20.
  • the extensions 32 and 34 are clamped between layers 36 of rubber or another suitable resilient material, by means of rigid capping members 38 held together by inextensible fasteners 40 (see especially Figs. 3, 4 and 5) .
  • Fig. 5 illustrates the resilient interconnection 30 holding the castors 18 and 20 aligned with a notional horizontal line joining the pivots 14 and 16. In this configuration, the axles 22 and 26 are mutually parallel, holding the wheels 24 and 28 in line to steer the suspension system 10 straight ahead.
  • the longitudinal offset between the vertical pivots 14 and 16 and the points of contact of the respective wheels 24 and 28 with the ground react with the lateral offset of the vertical load from the points of contact of the wheels 24 and 28 with the ground to produce lateral force on the suspension system 10, causing swivelling of the castors 18 and 20 against the resilient restraint of the interconnection 30.
  • the lateral force causes the castors 18 and 20 to swivel in opposite directions and so turn the front and rear axles 22 and 26 to alignments which converge on the side of the suspension system 10 from which the lateral force is effectively applied.
  • Fig. 6 schematically illustrates the straight-ahead steering configuration detailed in Fig. 5, as viewed from the underside of a right-footed arrangement.
  • Fig. 7 shows the Fig. 6 arrangement as reconfigured to turn left upon being leaned to the left.
  • Fig. 8 shows the Fig. 6 arrangement as reconfigured to turn right upon being leaned to the right.
  • Fig. 3 shows the suspension system 10 with a boot 50 secured to the support member 12 to form a roller skate .
  • Parts of the castors 18 and 20, for example their extensions 32 and 34, and/or other parts of the resilient interconnection 30 may be disposed to bear on the underside of the support member 12 (which may be specifically shaped for this purpose) with relative sliding between the parts in contact when the castors swivel. Such additional direct or indirect vertical contact with the castors 18 and 20 will transfer vertical loading from the support member 12 in a manner which relieves the pivots 14 and 16 of skew loads.
  • the primary difference in the second embodiment with respect to the first embodiment concerns the nature of the resilient interconnection 130 which now takes the form of a resiliently bendable elongate member secured at either end to the castors 118 and 120, by being clamped thereto or inserted into sockets thereon.
  • the primary difference in the third embodiment with respect to the first embodiment concerns the nature of the resilient restraint on swivelling of the castors 218 and 220.
  • the resilient restraint 230 is a resiliently bendable elongate member (somewhat similar to the resilient member 130) coupled not only to the castors 218 and 220, but also to the support member 212.
  • the resilient member 230 is transversely linked at each end to the support member 212 by saddle clamps 260 and 262, which preferably do not provide substantial restraint to longitudinal movement of the member 230.
  • the castor extensions 232 and 234 are disposed upwardly to provide transverse linkage to the resilient member 230 at mutually separate points intermediate the ends of the member 230, but preferably not in a manner which inhibits relative longitudinal movement of the member 230.
  • the resiliently bendable elongate member 230 provides a resilient restraint, through the castor extensions 232 and 234, to swivelling of the castors 218 and 220 out of alignment with a notional horizontal line joining the castor pivots 214 and 216, such restraint being not merely by a resilient interconnection of the castors 218 and 220, but also by a resilient connection of each castor 218 and 220 to the support member 212.
  • this embodiment is a skateboard which is very similar to the roller skate of the second embodiment of Figs. 9 to 12, and differing mainly in details of dimension and proportion.
  • Parts of the fourth embodiment which are functional equivalents of corresponding parts in the first and second embodiments are given the same reference numerals but prefixed by "3" (i.e. equivalent fourth embodiment components have the first embodiment reference numerals plus 300).
  • equivalent fourth embodiment components have the first embodiment reference numerals plus 300.
  • this embodiment is a skateboard generally similar to the skateboard of the fourth embodiment of Figs. 15 to 17, and employing the same general principles as the fourth embodiment and the roller skates of the first, second, and third embodiments.
  • Parts of the fifth embodiment which are functional equivalents of parts in the preceding embodiments are given the same reference numerals as those of the equivalent parts of the first embodiment, . - but preceded by a "4" (i.e. equivalent fifth embodiment components have the first embodiment reference numerals plus 400).
  • the principal difference in the fifth embodiment with respect to the previous embodiments is in the nature of the resilient restraint to swivelling of the castors 418 and 420.
  • This resilient restraint now takes the form of individual resilient linkages between each castor 418, 420 and the support member 412.
  • the front castor 418 is coupled to a fixed point 470 on the underside of the support member 412 by a first resilient link 472 extending rearwardly from the back of the front castor 418.
  • the rear castor 420 is coupled to a fixed point 474 on the underside of the support member 412 by a second resilient link 471 extending forwardly from the front of the rear castor 420.
  • the castors 418 and 420 have independent resilient restraint as distinct from the restraint provided by resilient interconnection of the castors as employed in other embodiments, but the resilient restraint on swivelling of the castors 418 and 420 is otherwise equivalent and yields an essentially similar lean steering function.
  • resilient links 472 and 476 also provide vertical support for the ends of the castors 418 arid 420 remote from their respective pivots 414 and 416.

Abstract

Patins à roulettes et planches à roulettes à deux roues pouvant être dirigées par l'inclinaison du corps de l'utilisateur. Les roues sont montées en ligne l'une après l'autre afin de présenter un empiètement étroit et de permettre des performances similaires à celles des patins à glace. Chaque roue est montée sur une roulette pivotant verticalement, la roulette avant étant traînée et la roulette arrière étant directrice. Les forces latérales induites par l'inclinaison du corps de l'utilisateur font pivoter les roulettes dans des directions opposées et produisent l'effet de braquage. Des liaisons élastiques entre les deux roulettes et/ou entre chaque roulette et la partie inférieure de la planche (ou du patin) redressent de manière élastique les roulettes après le virage et tendent à les maintenir droites.
PCT/GB1989/000807 1988-07-12 1989-07-11 Patins a roulettes et planches a roulettes a suspension dirigeable WO1990000428A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8816590.7 1988-07-12
GB888816590A GB8816590D0 (en) 1988-07-12 1988-07-12 Two wheel roller skating shoe
GB8826386.8 1988-11-11
GB888826386A GB8826386D0 (en) 1988-11-11 1988-11-11 Two wheel undercarriage for skates & skate boards

Publications (1)

Publication Number Publication Date
WO1990000428A1 true WO1990000428A1 (fr) 1990-01-25

Family

ID=26294155

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/000807 WO1990000428A1 (fr) 1988-07-12 1989-07-11 Patins a roulettes et planches a roulettes a suspension dirigeable

Country Status (2)

Country Link
AU (1) AU3980689A (fr)
WO (1) WO1990000428A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991016113A1 (fr) * 1990-04-24 1991-10-31 Stefan Kubierschky Appareil de sport a roulettes
WO1992011908A1 (fr) * 1990-12-28 1992-07-23 Nordica S.P.A. Planche a roulettes alignees
AT395539B (de) * 1990-06-25 1993-01-25 Zourek Horst Lenkbarer rollschuh
WO1996039234A1 (fr) * 1995-06-06 1996-12-12 Harald Schulthess Patin a roulettes a roues alignees
WO1999055435A1 (fr) 1998-04-28 1999-11-04 Richard Ian Russell Planche a herbes ou planche de montagne
WO2000027488A1 (fr) * 1998-11-06 2000-05-18 Crosskate, Llc Ensemble roue directionnelle avec mecanisme d'amortissement et de force de centrage pour patin a roues alignees ou ski a roulettes
DE4013018C2 (de) * 1990-04-24 2000-12-07 Stefan Kubierschky Rollsportgerät
US6428022B1 (en) * 1999-12-13 2002-08-06 Yoshi Namiki Inline skateboard
WO2006051344A1 (fr) * 2004-11-11 2006-05-18 Armando Rizzo Accessoire pour patin
EP2711057A1 (fr) 2012-09-20 2014-03-26 Claudio Bazzurro Dispositif de roulement pour patin à roulettes

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR436795A (fr) * 1910-11-07 1912-04-04 Del Pere De Cardaillac De St Marie-Francois-Joseph Patin à deux roulettes dirigeable par la roulette de devant
CH113378A (fr) * 1925-04-03 1926-05-17 Albert Kustner Patin à roulettes.
US2162128A (en) * 1937-03-10 1939-06-13 Jacob George Smith Roller skate
GB639988A (en) * 1946-05-09 1950-07-12 Paul Steiger Appliance with supporting plate and rollers for the propulsion of a person standing with the foot thereon
FR2201108A1 (fr) * 1972-09-25 1974-04-26 Copier Henri
GB2018139A (en) * 1978-04-06 1979-10-17 Bahmueller Masch App Bau Roller Skate
FR2624382A1 (fr) * 1987-12-11 1989-06-16 Artus Bernadette Patins a roulettes orientables

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR436795A (fr) * 1910-11-07 1912-04-04 Del Pere De Cardaillac De St Marie-Francois-Joseph Patin à deux roulettes dirigeable par la roulette de devant
CH113378A (fr) * 1925-04-03 1926-05-17 Albert Kustner Patin à roulettes.
US2162128A (en) * 1937-03-10 1939-06-13 Jacob George Smith Roller skate
GB639988A (en) * 1946-05-09 1950-07-12 Paul Steiger Appliance with supporting plate and rollers for the propulsion of a person standing with the foot thereon
FR2201108A1 (fr) * 1972-09-25 1974-04-26 Copier Henri
GB2018139A (en) * 1978-04-06 1979-10-17 Bahmueller Masch App Bau Roller Skate
FR2624382A1 (fr) * 1987-12-11 1989-06-16 Artus Bernadette Patins a roulettes orientables

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4013018C2 (de) * 1990-04-24 2000-12-07 Stefan Kubierschky Rollsportgerät
WO1991016113A1 (fr) * 1990-04-24 1991-10-31 Stefan Kubierschky Appareil de sport a roulettes
AT395539B (de) * 1990-06-25 1993-01-25 Zourek Horst Lenkbarer rollschuh
WO1992011908A1 (fr) * 1990-12-28 1992-07-23 Nordica S.P.A. Planche a roulettes alignees
AU641582B2 (en) * 1990-12-28 1993-09-23 Nordica S.P.A. Skate with aligned steerable wheels
WO1996039234A1 (fr) * 1995-06-06 1996-12-12 Harald Schulthess Patin a roulettes a roues alignees
FR2735035A1 (fr) * 1995-06-06 1996-12-13 Schulthess Harald Patin a roulettes a roues alignees.
WO1999055435A1 (fr) 1998-04-28 1999-11-04 Richard Ian Russell Planche a herbes ou planche de montagne
WO2000027488A1 (fr) * 1998-11-06 2000-05-18 Crosskate, Llc Ensemble roue directionnelle avec mecanisme d'amortissement et de force de centrage pour patin a roues alignees ou ski a roulettes
US6241264B1 (en) 1998-11-06 2001-06-05 Crosskate, Llc Steerable wheel assembly with damping and centering force mechanism for an in-line skate or roller ski
US6428022B1 (en) * 1999-12-13 2002-08-06 Yoshi Namiki Inline skateboard
WO2006051344A1 (fr) * 2004-11-11 2006-05-18 Armando Rizzo Accessoire pour patin
EP2711057A1 (fr) 2012-09-20 2014-03-26 Claudio Bazzurro Dispositif de roulement pour patin à roulettes

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