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
  • A63C17/22—Wheels for roller skates
  • A63C17/223—Wheel hubs

Definitions

• the invention relates to a wheel for skates and skateboards and its method of manufacture.
• a conventional wheel for roller skate consists of a polyurethane or rubber tread, intended to come into contact with the ground, mounted on a rigid core, the assembly being mounted on a skate frame so as to allow the wheel rotation. Following the many friction experienced by the wheel during the use of the pad, the tread wears quickly. As its wear progresses, the performance of the pad is greatly reduced and the entire wheel is changed, the worn wheel being entirely thrown away.
• a wheel is for example described in the document EP0935984. It comprises a central portion composed of a central hub connected by small spokes to a peripheral portion comprising the tread.
• the central hub defines two lateral cavities in which two ball bearings can be housed, and a central tubular cavity in which is housed a tubular spacer element on which the two lateral ball bearings are supported.
• the assembly is fixed to the frame of a shoe by a fixing element consisting mainly of a rod which passes through the ball bearings and the tubular bracing element and is fixed on either side of the wheel on the frame of the skate.
• the main disadvantage of this solution comes from the fact that in case of wear of the tread, the wheel is completely changed, which is not economical.
• a second drawback stems from the fact that the tread is thick and heavy and contributes to increasing the weight of the wheel.
• a third drawback arises from the fact that the wheel represents an indissociable set whose core is made of a single injected and isotropic material.
• a general object of the present invention is therefore to provide a wheel for skateboard and skateboard which does not have the disadvantages of the prior art.
• a first object of the present invention is to provide a wheel for skateboard and skateboard that is easy to assemble and disassemble to allow the recycling of certain parts in case of wear of the tread.
• a second object of the present invention is to provide a wheel for skateboard and skateboard which has a minimum weight and good performance.
• a third object of the present invention is to provide a wheel for skateboard and skateboard which is economical.
• a fourth object of the present invention is to provide a simplified method of manufacturing a wheel for skateboard and skateboard.
• the invention is based on a wheel having a circumferential portion with tread, connected to a central hub incorporating the ball bearing (s) by two separate side flanges.
• the invention consists of a wheel for skate or skateboard, comprising a peripheral element, comprising a tread mounted on a rigid element, connected to two side flanges, and comprising a hub, comprising a housing for at least a ball bearing and a connection means with the flanges.
• the hub may comprise at least one fastening means to allow the fixing of at least one flange.
• the hub fixing means may be a threaded surface and at least one flange may be held fixed to the hub by means of a nut screwed onto the threaded surface or at least one flange also has a threaded surface so that be screwed directly onto the threaded surface of the hub
• the hub may comprise two lateral threaded surfaces for fixing the two flanges, these two threads being oriented in opposite directions so that the rotation of the wheel tends to tighten the screwed elements.
• the two flanges can be positioned in abutment on the hub and fixed together by a transverse means.
• the hub may comprise at least one shoulder against which is positioned a flange.
• the rigid element of the peripheral element may include slots for positioning the flanges.
• the flanges may have a convex shape to dampen the shocks to the wheel.
• the flanges may be in a lightweight composite material, in an injected plastic or metal.
• the invention also relates to a method of manufacturing a wheel for skateboard or skateboard which comprises the following steps:
• Figure 1 shows a perspective view of a disassembled wheel according to a first embodiment of the invention
• Figure 2 shows another perspective view of a disassembled wheel according to the first embodiment of the invention
• FIG. 3 represents a perspective view of a wheel mounted according to the first embodiment of the invention
• FIG. 4 represents a perspective view of a disassembled wheel according to a second embodiment of the invention
• FIG. 5 represents a front view of the wheel mounted according to the second embodiment of the invention
• Figure 6 shows a sectional view of the wheel fixed to a frame according to the second embodiment of the invention
• Figures 7 to 12 show sectional views along a vertical plane passing through the center of the wheel of several embodiments of a wheel according to the invention.
• the roller skate wheel comprises a peripheral portion composed of a narrow polyurethane tread 1 mounted on a thin ring made of rigid material 2 which comprises locations 3 dedicated to positioning of two lateral flanges 4.
• the two side flanges 4 are identical, relatively flat and star-shaped, the tips of which comprise male parts 5 intended to be housed in the openings 3 of the ring 2.
• the flanges are moreover in a light composite material, in an injected plastic or metal, for example magnesium or aluminum relatively thin.
• a tubular central element or hub 6 which has on its outer surface two threaded lateral portions 7 and a central portion of larger diameter thus forming two lateral shoulders 8 against which the two flanges abut 4 which have a central circular opening whose diameter is slightly greater than that of the threaded side portions 7 of the hub 6.
• the hub 6 is made of a rigid material, metal or composite material.
• the two flanges 4 are then secured to the hub 6 by two nuts 9 screwed onto the threaded side portions of the hub 6. At the same time, this attachment also makes it possible to secure the hub 6 to the peripheral portion composed of the tread 1 and the rigid ring 2.
• the hub 6 further comprises a cylindrical opening in which are housed two lateral ball bearings 10, maintained at constant spacing by a spacer not shown.
• the wheel thus obtained may be fixed to the frame of a shoe by means of a central axis 12, as will be illustrated in FIG.
• the two flanges are starred and flat and their tips 5 are supported on locations 3 provided on the rigid ring 2.
• FIG. 6 illustrates a sectional view of this wheel fixed on a skid frame 11 by means of an attachment pin 12.
• the torsion forces experienced by the wheel are transmitted by the attachment pin 12 to the ball bearings 10 then hub 6, which is resistant to these constraints by nature.
• FIGS. 7 to 11 show alternative embodiments which differ in the shape of the flanges 4, their positioning in locations 3 of the peripheral ring 2 and their fixing at the level of the hub 6.
• the flanges 4 may have a more or less convex shape.
• a convex shape as illustrated in FIG. 7, allows the flanges 4 to have an elasticity which enables them to fulfill a function of damping shocks transmitted on the tread 1.
• the locations 3 on the rigid rings 2 may be simple support points as illustrated in FIGS. 7, 10 and 11 or clipping or interpenetration solutions as illustrated in FIGS. 8 and 9. Any other solution may to be considered.
• connection of the flanges on the central hub may consist of the use of nuts 9, as illustrated in FIGS. 7 and 8. It may also consist of a direct screwing of the flanges on the hub 6 as is illustrated in the figures 9 and 10, the central circular opening of the flanges then having a thread.
• connection of the flanges on the central hub may consist of a simple support of the flanges on the hub 6, the flanges being fixed directly to each other by means 13.
• the two flanges are substantially flat and a transverse means 13 keeps them directly connected to each other.
• the means 13 consists of the connection of two annular portions of the flanges which allow to form a second central core positioned in abutment on the outer circumference of the hub 6.
• the two annular parts of each flange have a threaded portion to allow their attachment by simple screwing. This variant has the advantage of reinforcing the wheel.
• a side portion of the hub may comprise a stop, integral with the hub, the latter having a shape such that the two flanges can be introduced on the same side opposite to that comprising the abutment. one of them sliding until coming to rest on the stop before being fixed everywhere means.
• flanges 4 or nuts 9 on the hub 6 it is preferably chosen a thread such that the rotation of the wheel in the direction of travel of the pad causes an effect tending to screw the nuts or flanges screwed.
• the direction of the lateral threads of the hub will be opposite and chosen in the direction to obtain the desired effect.
• a single ball bearing can be used.
• the hub may consist of two parts defining a central location for housing the single ball bearing.
• the invention also relates to a method of manufacturing a wheel for skateboard or skateboard which comprises the following steps:
• the elements like the hub with ball bearing and the flanges are recyclable, that is to say that they can be reused with several different treads;
• the separation of these different elements makes it possible to optimize the performance and the weight of the assembly because different materials can be used.
• the flanges may be simplified and lightweight elements made of composite material based on carbon fibers, and the hub may be rigid, of machined aluminum;

Landscapes

• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
• Rolling Contact Bearings (AREA)
• Rollers For Roller Conveyors For Transfer (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34950859

Family Applications (1)

Country Status (3)

Families Citing this family (3)

Family Cites Families (5)

• 2004
  • 2004-09-14 FR FR0409724A patent/FR2875143B1/fr not_active Expired - Fee Related
• 2005
  • 2005-09-14 WO PCT/IB2005/002722 patent/WO2006030287A1/fr not_active Ceased
  • 2005-09-14 EP EP05782779A patent/EP1796797A1/de not_active Withdrawn

Non-Patent Citations (1)

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