EP0392140B1 - Patin à roulettes dirigeable - Google Patents

Patin à roulettes dirigeable Download PDF

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Publication number
EP0392140B1
EP0392140B1 EP90101584A EP90101584A EP0392140B1 EP 0392140 B1 EP0392140 B1 EP 0392140B1 EP 90101584 A EP90101584 A EP 90101584A EP 90101584 A EP90101584 A EP 90101584A EP 0392140 B1 EP0392140 B1 EP 0392140B1
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EP
European Patent Office
Prior art keywords
footrest
foot support
pull
skateboard according
skateboard
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.)
Expired - Lifetime
Application number
EP90101584A
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German (de)
English (en)
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EP0392140A3 (en
EP0392140A2 (fr
Inventor
Ute Magdalene Grützner
Peter Mickenbecker
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Individual
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Individual
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Publication of EP0392140A2 publication Critical patent/EP0392140A2/fr
Publication of EP0392140A3 publication Critical patent/EP0392140A3/de
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Publication of EP0392140B1 publication Critical patent/EP0392140B1/fr
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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
    • A63C17/12—Roller skates; Skate-boards with driving mechanisms
    • 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
    • A63C17/01—Skateboards

Definitions

  • the present invention relates to a steerable roller board with the features of the main claim.
  • the utility model DE GM 83 27 001 is a steerable roller board with a support plate, each with one on the underside of the support plate arranged transversely to the front and rear axles, on each of which a front and rear wheel set is rotatably mounted, and with one Rear wheel set fixed wheel hub described.
  • the roller board has a drive that consists of a spring and a pull rope.
  • the support plate of this roller board is flat except for a rear part.
  • a small steering plate in the front part of the support plate is used for steering, which, like the support plate itself, lies in a horizontal plane.
  • a disadvantage of the utility model DE-GM 83 27 001 is the low stability of the skateboard driver.
  • US-A-4 319 760 describes a skateboard consisting of a frame member, wheels, front and rear footrests and muscular power actuators for two-armed operation.
  • the muscular force drive devices which can be actuated with two arms, however, develop a driving force only in one pulling direction, the pull in the opposite direction only serves to return the drive device.
  • This type of drive is ergonomically unfavorable and offers no support option on the drive device.
  • the object of the present invention is to provide a roller board that can be driven with both hands with muscle power drive devices and is ergonomically designed so inexpensively that both the drive and the steering can be effected in an ergonomically favorable position.
  • the drive by means of two pulling elements at the front and rear end of the roller board results in an ideal arrangement of the footrests at the front and rear end of the roller board.
  • the feet should be able to stand as close as possible to the pulleys in order to keep the forces on the roller board as low as possible or to avoid unfavorable lever arms.
  • the user can best exert force in this position, arms, torso and legs can work against each other in exactly one line.
  • the angular inclination of the two areas can be adjusted and ascertained that there is a firm support for the skateboarder, who is transverse to the direction of travel feet on the roller board with a comfortable spread leg position.
  • the front leg or front foot stands firmly on the rotatable footrest that is intended for steering.
  • the power that the driver has to exert is distributed over different muscle parts. As a result, higher performance is achieved with the same subjective effort.
  • the (antagonistic) muscle parts that balance each other are always used and trained. This causes a medically desired balanced development of the muscles, is ergonomically / physiologically advantageous and prevents tension and postural damage.
  • the extension of the actuation path which is provided according to the requirements, acts like a quick translation.
  • the driver can move further or choose the area in which he moves the handles back and forth more freely. This allows larger parts of the body's muscles to be involved in the work. There is also more time in which he can apply force with a uniform movement or relieve and regenerate the antagonist.
  • both arms it is possible according to the invention to use both arms as desired. It is e.g. interesting for long distances, to be able to pull alternately, but to overcome e.g. a curb it is cheap to be able to pull with both arms at the same time.
  • the highest level of driving comfort is achieved when the auxiliary devices can be used under tension and pressure. In this case e.g. for each tension element, i.e. a total of 4 freewheels turn the drive shaft.
  • the drive of the roller board via traction elements allows you to move in a controlled manner even at the lowest speeds without having to touch the ground with your feet. This is an advantage if you want to keep clean / dry shoes on unclean ground. This ability to drive slowly without acrobatic skills (even on uneven ground) is an important advantage of the present invention.
  • the wheels or the shaft on which they rotate can be very easily and stably suspended with low weight.
  • the guidance and winding of the tension elements is problem-free. It is structurally particularly favorable to pull the edges of the support part down at the sides and rear and to mount the rear wheel shaft in the side parts. This creates a container that is closed to the side and to the rear, even if a plate is provided at the top.
  • This container is light and stiff on the one hand, on the other hand it protects the mechanics housed in it and at the same time forms the fenders. If the entire board is folded up and placed upright (see Fig. 4), the container can prevent dirt from the wheels from coming into contact with the surroundings.
  • the ring element is excellently suitable for carrying in a drivable condition. Since it encloses the footrest and can be padded on the outside, the environment is protected when bumping into the wheelboard driver's steering. This could be the case if it bumps somewhere with a rotatable footrest that protrudes above the board, since it is almost sideways when driving straight ahead.
  • the steering system according to the invention enables an inexperienced person to drive a roller board straight away at moderate speeds.
  • the roller board can be used, for example, to pull a playmate sitting on it like a sled.
  • the arrangement of the front pulling element according to the invention is also outstandingly suitable in tight curves.
  • a roller board according to the invention can also be pulled behind in tight curves without the driver having to steer. Therefore, it can also be used excellently, e.g. B. Bring purchases from business to car. Since it does not have to be returned, it is more practical than using a shopping cart. It also enables the user to get from the car to the store quickly, for example, and it is even more practical than a shopping cart within large markets, since it makes it easier to move forward. It is easy to use, since the pulling element according to the invention can be blocked in the desired length, for example by a kind of Tanka closure, and can be automatically retracted by the device after use.
  • the roller board can also be kept under control while jumping by means of a foot pedal or a catch on the deflection roller attached to the handle.
  • the driver has to hold the board with his hands when jumping certain figures.
  • the drive of the invention allows by the favorable arrangement of the pulleys at the front or rear end of the roller board a much safer use than it would be possible with conventional roll boards or in the first document. This is particularly important for beginners who need something to "hold on” in their hands so as not to be put off by use. You can press a roller board according to the invention against your feet by pulling on the pulling elements as long as there is contact with the ground. Or you can make it easier to keep your balance on the board by pulling on the handles. The only disadvantage then is that when the handle is pulled, it yields a little faster or slower, depending on the translation and speed. So you cannot stabilize yourself continuously over a long period of time.
  • the freewheel drive can be easily disengaged, for example with a lever that is stepped on with the foot. For example, it can be provided with an inner profile and moved on a correspondingly profiled shaft that is round over part of its length.
  • the skateboard driver standing perpendicular to the direction of travel has a firm support of the feet on the support plate with a comfortably spread leg position.
  • the front leg or the front foot stands firmly and slightly obliquely forward on the rotatable footrest, which is intended for the steering. According to the invention, it is possible to adjust the footrest angle in the direction of travel relative to the road surface.
  • the adjustability of the angle of rotation of the front footrest makes technical / ergonomic sense if a roller board is to be driven in the manner mentioned and to be used ergonomically and satisfactorily by different drivers. This has been shown in driving tests. Different build people with very different leg lengths can only do without a distance adjustment between the front and rear footrest if the inclination of the footrests can be adjusted to the different leg spread angle.
  • the adjustment options for the angles ⁇ and ⁇ ⁇ can complement each other. If the front footrest is adjusted horizontally with the angle adjustment ⁇ ⁇ , it is possible, as described above, to use it as an extension of the support plate. However, if a large object is now placed on the support plate and the footrest, it is disruptive if the footrest is in the steering movements turns with. But this is easy to remedy. If the fixing device of the joint for the angle ⁇ is not fixed, the footrest 15a can be rotated with respect to the front wheel and deflection roller 5. This means that the front tension element 2 can be steered without problems. This also applies if a heavy load (such as a sack of potatoes) resting on the ring element would hinder steering movements of the pulling element in its normal place. In the arrangement shown in FIG. 2, the pulling element can then simply be pulled out from under the ring element.
  • a heavy load such as a sack of potatoes
  • the front footrest can be folded down according to the invention.
  • the front wheels come to rest against the support plate from below. For example, if the board is transported in the car, you cannot touch and dirty the trunk.
  • the bearing for the front, rotatable footrest is not attached between the wheels and the footrest, but is placed around the footrest in the form of a ring. This could be solved constructively with a four-point thin ring bearing.
  • FIG. 2 In order to keep the manufacturing costs low, a solution was shown in FIG. 2, where there is a roller at each corner of the footrest, which rests positively on the ring and rolls off.
  • the roles can each be simply ball-bearing, and are so far outside that they with an optimal lever arm Can support ring element.
  • the ring element does not need to be manufactured as precisely as a thin ring bearing of the same size; the rollers can preferably have surfaces made of elastic plastic, for example.
  • the footrests in this construction as they are connected at the edges to the roller board, are far less stressed than in the conventional construction with central support. So they can be made thinner and lighter or are far more stable. They can also be pulled downwards for stiffening, for example, on the longitudinal edges, which are mainly loaded, without a board underneath them severely constricting this space.
  • the footrests can e.g. be formed from thin sheet metal, which would not be possible with conventional constructions for reasons of strength.
  • the surface of the footrest can also be particularly deep, or the wheels can be sprung without any problems because of the large space available.
  • a rubber-mounted swing axle as used by conventional Skateboards without a rotating plate is known, simply screwed directly under the footrest.
  • the ring element is excellently suitable for carrying in a drivable condition. Since it surrounds the footrest and can be padded on the outside, the environment is protected when bumped into it. The steering wheel driver is not spoiled for the skier. This could be the case if it bumps somewhere with a rotatable footrest that protrudes above the board, since it is almost sideways when driving straight ahead.
  • the ring element is always in the field of vision and is the outstanding feature of the roller board according to the invention. From the point of view of the unity of form and function, the ring element also has the task of symbolizing the function of the footrest, which is that of a steering wheel.
  • the combination of footrest and ring results in a shape that bears a striking resemblance to the familiar car steering wheels. This is psychologically important, since an important target group is not the die-hard skateboarder. So you shouldn't create an impression that is too reminiscent of a skateboard. On the contrary, it should be emphasized that this is a reliable, simple, known type of steering and that no embarrassment is to be expected on the first awkward attempts.
  • the narrow tread of a conventional roller board there is always the fear in the subconscious of the untrained person to step or slip.
  • the ring counteracts this. It looks like a railing that protects against the fall.
  • the ring itself is an element that symbolizes protection (lifebuoy), and so a small part contributes to confidence in the controllability and safety of the device.
  • the ring indicates the position in which the front foot should stand by its center (crosshairs). It does not force the user into a position exactly, but leaves him freedom for individual adjustment.
  • the ring is also ideal for securing the roller board to a fixed object with a ring lock.
  • only one steerable front wheel is required without tilt steering. But two wheels can also be mounted.
  • the muscle power drive devices each act on the drive shaft via a freewheel or the like. If both drive devices act on the same drive shaft, it has proven to be expedient if the winding devices for the pulling elements of the two driving devices are connected to one another with a compensating element which respectively winds up the pulling element not currently used for driving against the driving direction.
  • the compensating element can run over a spring-loaded roller which exerts a pull on the compensating element in the direction away from the winding device. This promotes a clean winding of the tension elements on the winding devices.
  • a roller board is created, the drive, ergonomics and operability of which is improved, which is easy to manufacture, has good steering ability and gives the roller board driver improved stability.
  • usability means practical usability, even without sporting training, by as large a proportion of the population as possible in a wide variety of everyday tasks. As with cycling, sporting activities should also happen.
  • a handle element for carrying (7a) is attached to the extension of the front area (3) of the roller board on the roller board shown in FIG. 4.
  • the front area (3) is shifted against the (now lower) rear area (4) in such a way that it takes up as little space as possible in combination with the front wheel (6a) folded down.
  • the rear footrest (15) is attached to the rear edge of the supporting part (1) in such a way that dirt is caught on the inside by the wheels (6).
  • the steerable roller board (skateboard) consists of a support part (1) which is divided into two parts, a front area (3) and a rear area (4).
  • the horizontal central axis (22) of the rotatable footrest (15) and the horizontal central axis (23) of the rear region (4) of the supporting part (1) are horizontal to each other at an angle ⁇ of 20 to 80 °, preferably 30 to 60 ° inclined when the steering is in the straight-ahead position, or it must be recognizable to the driver in which direction the steering is turned if no central axis of the footrest is recognizable.
  • the surface of the front footrest (15) in the direction of travel to the road level (9) is preferably at an angle ⁇ ⁇ of 20 to 50 °, preferably 20 to 40 ° and in particular 20 to 25 °.
  • the angle ( ⁇ ) can be adjustable by a joint (17). This is not necessary if a round front footrest (15a) is used. In this case, however, it is necessary for good handling of the roller board to indicate to the driver how he must turn the footrest (15a) so that it is in the neutral position. This also applies, in particular, if the angle of an out-of-round footrest can be adjusted, i.e. if a certain angle is not practiced, but the straight-ahead position is not readily apparent. In Fig. 2 it is given in the form of the deflection roller (5), which always points in the direction of travel. A deflection roller for the front tension element (2) can advantageously be connected to the front footrest (15).
  • the deflection roller (5) can be firmly connected to the front wheel or wheels and can be mounted with a joint (17) so that it can move relative to the surface of the front footrest (15a). This allows it to be used as a loading area without disturbing the steering movements.
  • the roller board is equipped with muscle power drive devices, which are located in the rear as well as in the front area (3, 4). In one embodiment, they are preferably designed as tension elements (2) which are over deflection rollers (10) and are provided with grip elements (7).
  • the handle elements (7) can not in the rest position of spacers (11), which can be attached to the roller board, and the pull elements (2) when actuated should be held in a plane above the supporting part (1).
  • auxiliary devices (19a, b) can be provided which can be actuated by pressure, as shown on the side of FIG. 1c.
  • the movement of the arms roughly corresponds to that of cross-country skiing; for drawing reasons, the bar (19b) has been drawn much thicker than it would be true to scale.
  • These auxiliary devices (19a, b) can consist of upper rods (19a) and lower rods (19b) which are mounted so as to be displaceable relative to one another.
  • deflection rollers can be attached, via which the tension elements (2) are deflected onto the lower ends of the rods (19a). This makes it possible to push the handle element (7b) down with the arm extended and raised.
  • Auxiliary devices (19a, b) can also be provided simultaneously or instead, which extend the actuation path of the hands compared to the path covered by the traction elements (2).
  • Such an auxiliary device (19) is shown on the right-hand side of FIG. 1c, by means of which the path of the hands is doubled compared to the path of the pulling element (2).
  • auxiliary devices (19a, b) can consist of upper rods (19a) and lower rods (19b) which are mounted such that they can be moved relative to one another and deflection rollers at the ends carry.
  • a second tension element (20) runs endlessly over these.
  • a handle element (7b) can be attached to one half of the tension element (20) between the two rollers.
  • the tension element (20) can be connected with a rod (19b) exactly opposite each other.
  • the handle element (7b) can be moved in a way approximately from the lower end of the lower rod (19b) to the upper end of the upper rod (19a).
  • the upper rod (19a) only needs to be connected to the lower rod (19b) with a short piece in the extended state.
  • this pull element (2) can also be used to drive. In this case, another freewheel (13) would have to sit on the drive shaft (16). It is also possible to use only an auxiliary device, for example on the rear one Drive pulley (5), but preferably in the area between the center between the two axes (17 ', 16) and the front edge of the rear footrest (15b).
  • the rod (24) can be locked in at least one inclination to the frame part (1). It can also be pushed, disassembled and folded to save space after use.
  • the handle elements (7) are rotatably mounted relative to the rod (24) in order to ensure an ergonomically favorable hand position in all phases of movement.
  • the handle elements (7) are held in the rest position by spacers (11) which are attached to the roller board and do not touch the tension elements (2) when actuated.
  • the handle elements (7) are held in one plane above the frame part (1).
  • the tension elements (2) can be blocked at any distance from the supporting part (1), so that they can no longer be automatically drawn into the roller board or pulled out under load even when there is strain relief. They can also or instead be brought out of engagement with the drive shaft (16) with the centrifugal clutch or the freewheel (13) so that the driven wheels (6b) no longer pull the traction elements (2) into the roller board or the traction elements when turning backwards (2) can be pulled out without driving the wheels (6b).
  • Two or more muscle force drive devices on the drive shaft (16) can each be equipped with at least one centrifugal clutch and / or at least one freewheel (13).
  • the driven wheels (6b) can each be connected to the drive shaft (16) via a freewheel (13) and / or a centrifugal clutch.
  • the steerable front wheels (6a) can have a steering axis angle of less than 90 degrees to the ground with respect to the roadway plane, and / or the steering axis angle can be adjustable at least in the range less than 90 degrees and set to 90 degrees.
  • the footrest (15) can be rotatably mounted on rollers (5) which roll on the ring element (8). At least one footrest (15) can be movably attached to the support plate (1) and fixed with locking devices, so that dirt previously under the roller board or on the wheels (6) is at least partially enclosed and / or the dimensions or storage properties of the roller board are changed can be.
  • the inclination of the surface of the front footrest (15) can be adjusted in the direction of travel to the road level (9) and can be fixed with locking devices.
  • At least one guide device (14) can be provided, under which the foot is placed and through which the roller board can then be raised.
  • a ring element (8) surrounds the front rotatable footrest (15a) and serves as a bearing element for the footrest or is part of the bearing element. Rollers (5) are rotatably mounted on the footrest (15a) and roll on the ring element.
  • the ring element (8) is firmly connected to the frame part (1) or the front region (3) of the frame part (1).
  • a transport container is attached to the frame part (1).
  • At least one transport container can also be fastened movably in one or more directions on an adjustable support part. The contents of the container can be easily reached without having to bend down like a shopping trolley. After loading, the transport container can be lowered onto the frame part (1) in order to drive over it or to be able to pull the loaded roller board without the risk of tipping over.
  • This is e.g. B. interesting if the available space for driving on the roller board is not sufficient.
  • the traction elements (2) can be blocked over the entire course of their commute, so that they can no longer be automatically drawn into the device or relieved under load when there is strain relief.
  • All tension elements (2) are preferably arranged on or approximately on the central longitudinal axis of the roller board.
  • a pulling element on which the driver can pull in both directions can be guided endlessly over two freewheels or centrifugal clutches acting in the same direction, so that when pulling the pulling element in both directions a freewheel or a centrifugal clutch is actuated.
  • a footrest (15) can be movably attached to the frame part (1) and fixed with locking devices.
  • Each muscle power drive device on the same drive shaft (16) can be equipped with at least one centrifugal clutch and / or at least one freewheel (13).
  • the driven wheels (6b) can each be connected to the same drive shaft (16) via a freewheel (13) and / or a centrifugal clutch.
  • the drive shaft (16) can be pivoted relative to the frame part (1), e.g. around an axis lying in the direction of travel, in order to be able to incline the surface of the roller board with the body in the curve and to prevent a risk of tipping - especially when carrying loads on the roller board.
  • This axis runs parallel or at an angle between 0 and 60 ° to the road surface.
  • the receiving device of the rod can be connected to the drive shaft (16) such that the rod (24) and the drive shaft (16) can be pivoted relative to the frame part (1).

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Claims (10)

  1. La planche à roulettes, comprenant une plate-forme, des roues, un repose-pied avant (15a) et un repose-pied arrière (15b) et des mécanismes de propulsion musculaire mis en action par les deux bras, en utilisant les mécanismes de commande musculaire comme poussoir et/ou comme tracteur à l'aide d'une barre (24) et en fixant des éléments de traction (2) à la barre, qui est reliée à la plate-forme et de préférence dirigeable dans le sens longitudinal ou latéral.
  2. La planche à roulettes d'après la revendication 1, est caractérisée par le fait que les mécanismes de propulsion s'exercent sur un axe de transmission commun (16).
  3. La planche à roulettes d'après la revendication 1, est caractérisée par le fait que les éléments de traction (2) des mécanismes de propulsion musculaire sont fixés à la barre (24) dans la zone entre le milieu de l'axe de transmission (16) et l'axe d'articulation (17') et qui sépare la zone avant de la plate-forme (3) de la zone arrière (4), et l'arête avant du repose-pied arrière (15b).
  4. La planche à roulettes d'après la revendication 1, est caractérisée par le fait que le repose-pied avant est relié à une ou plusieurs roues avant (6a) dirigeables et que l'axe médian horizontale (22) du repose-pied avant et l'axe médian horizontale la partie arrière (23) de la plate-forme (1) font dans le plan horizontal un angle β de 20° à 80° par rapport à la piste de roulage (9), si la conduite est dans la direction droit devant.
  5. La planche à roulettes d'après les revendications 1,2,3 ou 4, est caractérisée par le fait qu'elle prévoit des installations auxiliaires (19a), qui permettent d'exercer manuellement une tension sur les éléments de traction (2) et/ou des installations auxiliaires (19b) qui prolonge la course manuelle des éléments de traction (20) par apport à la course des éléments de traction (2).
  6. La planche à roulettes d'après la revendication 1, est caractérisée par le fait que la roue resp. les roues avant (6a) dirigeables ont un axe de direction qui fait un angle β' de 20° à 50° par rapport à la piste de roulage (9).
  7. La planche à roulettes d'après la revendication 4, est caractérisée par le fait que le repose-pied avant (15a) est monté sur un anneau (8), qui entoure le repose-pied (15a) et qui est solidaire de la plate-forme (1).
  8. La planche à roulettes d'après la revendication 1, est caractérisée par le fait que tous les éléments de traction (2) sont disposés sur ou presque sur l'axe longitudinal médian de la planche à roulettes.
  9. La planche à roulettes d'après la revendication 1, est caractérisée par le fait que les installations de traction ou de poussée sont équipées de poignées (7,7b) et peuvent être dirigées au moyen de poulies de guidage.
  10. La planche à roulettes d'après les revendications 1 et 2, est caractérisée par le fait que la barre (24) et l'axe de transmission (16) peuvent être repliés contre la plate-forme.
EP90101584A 1989-01-28 1990-01-26 Patin à roulettes dirigeable Expired - Lifetime EP0392140B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3902547 1989-01-28
DE3902547A DE3902547A1 (de) 1989-01-28 1989-01-28 Lenkbares rollbrett

Publications (3)

Publication Number Publication Date
EP0392140A2 EP0392140A2 (fr) 1990-10-17
EP0392140A3 EP0392140A3 (en) 1990-12-05
EP0392140B1 true EP0392140B1 (fr) 1995-05-17

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EP90101584A Expired - Lifetime EP0392140B1 (fr) 1989-01-28 1990-01-26 Patin à roulettes dirigeable

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US (1) US5029887A (fr)
EP (1) EP0392140B1 (fr)
AT (1) ATE122578T1 (fr)
DE (2) DE3902547A1 (fr)

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DE29510301U1 (de) * 1995-06-09 1995-11-16 Kroher Karl Rollvorrichtung
TW454539U (en) * 2000-11-08 2001-09-11 Gu Hung Jiun Rear-driven configuration swinging cart
US6341790B1 (en) * 2001-03-23 2002-01-29 Chih-Liang Chen Front wheel assembly for a skate vehicle
US6488295B1 (en) 2001-05-03 2002-12-03 Robert H. Bryant Stable and maneuverable two-wheeled vehicle
DE10141147B4 (de) * 2001-08-22 2004-05-13 Pan Patellis Rollbrett mit einem vom Fahrer bedienbaren Handzugtrieb
US7150461B2 (en) * 2002-01-07 2006-12-19 Minson Enterprises Co., Ltd Foldable skateboard
US20030178803A1 (en) * 2002-03-20 2003-09-25 Michael Killian Two wheel steering scooter with latitudinal aligned wheels
US7226062B1 (en) * 2003-10-24 2007-06-05 Nick Stefano Recreational wheelie vehicle
US7931519B2 (en) * 2007-02-14 2011-04-26 Jeremy Fox Fingerboard skateboard
US8079604B2 (en) * 2009-05-28 2011-12-20 Surfskate Industries, Llc Skateboard providing substantial freedom of movement of the front truck assembly
IT1394607B1 (it) 2009-06-08 2012-07-05 Bolditalia S R L Perfezionamento negli sci o tavola su ruote.
US7976034B1 (en) * 2010-01-25 2011-07-12 Hong Thomas K Foldable skateboard
WO2013106324A1 (fr) * 2012-01-09 2013-07-18 Wurst James Planche à roulettes à orientation inclinable à trois roues
US8684376B2 (en) 2012-01-09 2014-04-01 James Wurst Three wheel lean-steer skateboard
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Also Published As

Publication number Publication date
US5029887A (en) 1991-07-09
EP0392140A3 (en) 1990-12-05
ATE122578T1 (de) 1995-06-15
EP0392140A2 (fr) 1990-10-17
DE3902547A1 (de) 1990-08-09
DE59009077D1 (de) 1995-06-22
DE3902547C2 (fr) 1991-03-07

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