WO2017192150A1 - Véhicule terrestre à pilote debout pour simulation de ski - Google Patents

Véhicule terrestre à pilote debout pour simulation de ski Download PDF

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Publication number
WO2017192150A1
WO2017192150A1 PCT/US2016/031265 US2016031265W WO2017192150A1 WO 2017192150 A1 WO2017192150 A1 WO 2017192150A1 US 2016031265 W US2016031265 W US 2016031265W WO 2017192150 A1 WO2017192150 A1 WO 2017192150A1
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WO
WIPO (PCT)
Prior art keywords
pair
platforms
axle
mount
stand
Prior art date
Application number
PCT/US2016/031265
Other languages
English (en)
Inventor
Mark A. SLAGTER
Original Assignee
Slagter Mark A
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
Application filed by Slagter Mark A filed Critical Slagter Mark A
Priority to PCT/US2016/031265 priority Critical patent/WO2017192150A1/fr
Priority to EP16901147.5A priority patent/EP3452184A4/fr
Publication of WO2017192150A1 publication Critical patent/WO2017192150A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/18—Training appliances or apparatus for special sports for skiing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K21/00—Steering devices
    • B62K21/12—Handlebars; Handlebar stems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K3/00—Bicycles
    • B62K3/002—Bicycles without a seat, i.e. the rider operating the vehicle in a standing position, e.g. non-motorized scooters; non-motorized scooters with skis or runners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
    • B62K5/08—Cycles with handlebars, equipped with three or more main road wheels with steering devices acting on two or more wheels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
    • B62K5/10—Cycles with handlebars, equipped with three or more main road wheels with means for inwardly inclining the vehicle body on bends

Definitions

  • the present invention relates to the field of personal stand-on land vehicles, and more particularly, those with wheeled foot-platforms intended to simulate snow-skiing in order to enable all-year dry-land practice, training and instruction relating to recreational, competitive and professional snow skiing.
  • Skis and ice skates have long remained a preferred choice for unpowered personal stand-on vehicles for recreation and competitive events, when and wherever available, subject to climatic and seasonal limitations. These vary in north America and globally, ranging from far- away relatively unpopulated polar regions where skis and ice skates, along with snowshoes, become routinely essential for personal mobility, to populated tropical regions where natural ice and snow are unknown and where skating/hockey rinks and ski resorts are few and far between.
  • Skiing The invention relates particularly to downhill skiing, ranging from (a) gliding slowly down a shallow slope in a linear travel path requiring only minimal skill level, i.e. little, if any steering (apart from emergencies such as confronting a tree or rock), and only ordinary balance, as in standing and walking, to (b) zig-zagging rapidly down a steep slope, involving frequent maximally-sharp turns, e.g. in its extreme form, slalom competition, which demands the maximum available human skill levels, including muscular body movements coordinated for ongoing rapid abrupt changes in balance, momentum, force translations, etc.
  • Instruction, training and practice of skiing, and simulation relating to the present invention pertain primarily to skills and techniques of steering, ranging from incremental changes of heading to sharp cornering.
  • the skier gradually untilts the skis back to level while gradually moving the inside ski back until it arrives at a "neutral” position with the skis again rectangular (toe-to-toe) and flat on the snow, ready to travel on in a linear path or begin another turn, which if "left hand” requires similar but symmetrically opposite movements.
  • Unpowered stand-on land vehicles of interest regarding the present invention as candidates for skiing simulation ( having become associated with the youthful portion of the population due to the automobile) have evolved from once-popular rollerskates and scooters, as minor would-be rivals of skis, skates and snowboards, to the present predominance of skateboards, accompanied by a high degree of skill achievement of skateboarders and related enhancement of skateboards due to research and development.
  • rollerskates 2-wheeled attempts to simulate ice skates yielded to 4-wheelers for safety and ankle comfort, strapped or clipped onto, or made integral with the shoes.
  • Wheel mounts for attaching the front and rear rollerskate wheel pairs to the shoes evolved from firmly affixed to some degree of flexibility for tilting to facilitate and enhance turning, leading to the widespread use, in the present day skateboard predominance, of highly developed wheel “mounts” or “trucks” that couple a skateboard to the axle of a wheel-pair via an angled swivel arrangement that enables the user to steer by tilting the skateboard laterally for making turns, much in the manner of making turns in skiing as described above, wherein each ski is "banked", i.e. tilted by the skier to "carve” a turn.
  • the all-important "skewing” technique described above for skiing turns cannot be simulated by a single foot-platform such as a skateboard, or by a pair of foot- platforms affixed together or uncoordinated.
  • Low-friction bearings developed for wheels and rollers of rollerskates and skateboards facilitate and enhance free-wheel coasting and sustained zig-zag self-propulsion on a level surface, unattainable in snow-skiing due to the higher effective friction involved in turns, even with skilled turn "carving" as described above.
  • APPARATUS discloses a roller-skate-like assembly with tilt-steer mounts at front and rear wheel pairs of a "foot platform . . provided with a control handle attached to its side margin. . such as to facilitate banking control", shown deployed singly with a user's both feet on one platform, and also shown deployed in an independent pair with the user's feet attached one onto each foot platform and the control handles held one in each of the user's hands.
  • U.S. patent 4,805,936 issued Feb. 21, 1989 to Krantz for a WHEELED SKI discloses attached ski-boots, deformable wheels and "handheld braking mechanism for controlling speed and direction of travel"
  • U.S. patent 7,784,833 B2 issued Aug..31, 2010 to Tauchie for ROLLER SKIS discloses a "board made of an elastic material", "a boot secured to the board”, non-angled “top and tail casters", plus “four fixed rollers disposed in parallel on a central lower face" of the board.
  • U.S. patent 5,372,384 issued Dec. 13, 1994 to Smith for a SKI-TURN SIMULATOR discloses_and shows a pair of short platforms extending outboard from opposite sides of a central elongate wheeled main board as "simulated skis" whereby "both edging of the simulated skis and preferential weighting of the outside simulated ski contribute to tightening of the turn to prevent a fall by the user".
  • U.S. patent 7,762,564 B2 issued July 27, 2010 to Stene Johanson et al for a SKI SKEDGE discloses a ski sledge having a swiveling front ski with steering means, two essentially parallel rear skis and a seat connected via on or more rods to the steering means, where the rear skis are connected to the sledge by means of a parallelogram arrangement.
  • U.S. application 20020195788 published Dec. 26, 2002 for a STEERABLE IN-LINE STREET SKI discloses "a street ski comprising an elongated platform, a pair of trucks and a pair of wheels.
  • Each truck includes a wheel support pivotably associated with the elongated platform and a spring connected to the wheel support for resisting pivoting of the wheel support relative to the elongated platform.
  • a side- by-side pair of platforms are coupled and supported (a) at the rear by an integrated dual-truck axle assembly fitted at its ends with a pair of rear wheels located at opposite sides of the vehicle, supporting a rear portion of the vehicle via an angled-swivel tilt-steer mount under each platform and (b) at the front by an angled- swivel tilt-turn system including an angled extension strut/spacer framework attached to a pair of user handling bars, and to at least one front wheel, typically a roller in an angled-swivel-caster type mount.
  • This novel combination accomplishes dual-platform tilt- turning and skewing in response to the user's body movements that simulate the superior snow- skiing technique of "ski-skewing" the "inside" ski longitudinally for banked turns as in zig-zagging downhill.
  • the invention actually enables sustained self-propulsion, zig-zagging on level concrete and paved surfaces, powered only by user body movements during turns and enhanced by low- friction roller-wheels for free-wheeling coasting on straight runs, and is thus capable of providing, on dry land, both recreational pleasure and highly effective training and practice for snow-skiing for snow skiers of all ages and skill levels.
  • wheel and “roller”, which are often used interchangeably, the McGraw-Hill Dictionary of Scientific Terms (fifth edition) a wheel is defined as “a circular frame with a hub at the center for attachment to an axle about which it may revolve and bear a load", and a roller is defined as “a cylindrical device for transmitting motion and force by rotation”.
  • wheel is to be taken as the generic term, and "roller” denoting a particular sub-category: i.e. a type of wheel characterized by a substantial amount of "tread-width” i.e.
  • the single front mount being a swivel caster type that, for stable operation, requires the front wheel to be a roller with sufficient "tread width" , located to lag behind the angled pivot far enough to prevent wobbling.
  • Such stabilization is not required for the rear wheels: they are inherently stable because, being at opposite ends of axle assembly 18, the pair of wheels function as opposite ends of a single large roller, reacting on the axle-affixed tilt-steer mounts in a manner that provides the required stability inherently, independent of the tread-width of each wheel.
  • wheels with narrow or rounded treads fail prematurely due to wear-off in normal usage, therefore, amongst wider options available in the design choice for rear wheels, rollers are preferred and shown herein, with the additional aesthetic advantage of matching the appearance of the front roller(s).
  • wheel diameters in the present embodiments wheels of a pair are normally made identical, whereas front wheels may differ from rear wheels as a matter of design choice.
  • Fig. 1 is a three-dimensional view of a 3 -wheeled stand-on land vehicle in a primary embodiment of the present invention.
  • Fig. 2 is a top view of the vehicle of Fig. 1.
  • Fig. 3 is a side elevation view of the vehicle of Figs. 1 and 2.
  • Fig. 4 is a bottom view of the vehicle of Figs. 1-3.
  • Fig.5 is a top view as in Fig. 2, showing a rectangular pattern with the steering system set to hold the wheels set on-axis for 51inear travel.
  • Fig. 6 is a front view of the vehicle in Fig. 5 showing the foot platforms level and the wheels set for linear travel.
  • Fig.7 is a top view as in Fig. 6 but showing a skewed parallelogram pattern with the steering system set to turn the vehicle in the direction indicated by the roller-wheels.
  • Fig. 8 is a front view of the vehicle as in Fig.7. showing the foot platforms tilted and the wheels set for turning.
  • Fig. 9 is a plan view showing the vehicle of Figs. 1-4 showing the wheels set to turn the vehicle in a curved travel path, indicated by the broken lines, resulting from redirected wheel settings as shown.
  • Fig.10 is a three-dimensional view of a 4-wheeled stand-on land vehicle in a secondary embodiment of the present invention.
  • Fig. 11 Fig. 3 is a side elevation view of the vehicle of Fig. 10.
  • Fig. 12 is a bottom view of the vehicle of Figs. 11 and 12.
  • a three-wheeled land vehicle 10 is a primary embodiment of the present invention having a pair of platforms 12' and 12", typically non-metallic "foot-boards”, each with an attached non-slip foot-pad 12 A, for purposes of easy escape for safety in lieu of attached ski -boots or harnesses, Vehicle 10 rides on a centrally located front roller 14 and a pair of rear wheels 16' (optionally rollers) at the ends of an axle assembly 18.
  • platforms 12' and 12 are (a) rigidly extended forwardly by metal extension struts 24 and 26, bent to incline upwardly, typically at 45 degrees, and (b) coupled at a designated side-by-side spacing by cross-spacers 20 and 22.
  • a tubular pivot-bearing journal 28, attached centrally to cross-spacers 20 and 22 in their inclined plane (-45 deg.) is a thusly inclined swivel bearing portion of an angled swivel caster structure that includes front roller 14 installed between a pair of side brackets (see Figs. 2-4) and serves as the vehicle's front-end angled-pivot tilt-steer mount.
  • a pair of handling bars 30 and 32 fitted with hand grips 30A and 32A, are secured to the forward ends of the inclined extension struts 24 and 26 to move in unison in a manner that allows free hinged movement in any fore-and-aft plane with no consequences, whereas lateral movement +/- from neutral center applies +/- tilt to the foot-platforms 12' and 12, working in conjunction with the user's foot pressures keep the wheels 14 and 16 aimed as desired for steering.
  • the handling bars 30 and 32 in place of ski-poles but somewhat different in function, serve to facilitate steering and user balance, as detailed below in connection with Figs. 5-9, as well as enhancing safety and comfort.
  • platforms 12' and 12" are held spaced apart, as shown, via a corresponding pair of special angled-swivel tilt-steer truck mounts, each with a lower portion integrated as part of axle assembly 18, enabling the user to steer by simultaneously tilting the platforms in either lateral direction, clockwise or counterclockwise from neutral level, held by linkage to tilt in unison, in the manner that simulates a good snow-skier's balanced foot control, typically exerted by both feet in unison, e.g. in tilting for turns.
  • the polarity of platform tilt relative to turn direction is universally standard for making “banked " turns in vehicles of all kinds, including aircraft, watercraft, railroad trains, racecars, motorcycles, bicycles, etc., as well as in foot-controlled stand-on vehicles such as skateboards, ice skates, rollerskates and skis. etc.
  • Figs. 2-4 show top, side and bottom views of the vehicle of Fig. 1 with the handling bars 30 and 32 cutaway, showing, in more detail, extension struts 24 and 26, front roller 14 and its caster- type angled-swivel tilt-steer mount, attached to spacers 20 and 22 by its pivot-bearing journal 28.
  • FIG. 3 shows side views of extension strut 26, of pivot journal 28 and roller 14 of the caster- type angled-swivel front tilt-steer mounting system, and of the upper portion of the right hand rear truck mount 18A", visible in this view above the right hand rear wheel 16A".
  • Fig. 4 shows platform-attachment plate details of extension struts 24 and 26, and shows the rear wheels 16' an 16" at the ends of axle assembly 18, and, adjacent to wheels 16' and 16", the rear tilt-steer truck mounts 18 A' and 18 A" whose upper and lower portions are coupled by an angled- swivel mechanism of a type used widely in skateboard trucks.
  • the upper portions are attached to the underside of platforms 12' and 12" and the lower portions 18B' are integrated as part of the axle assembly 18, separated by an intermediate axle portion that establishes a designated separation dimension between the platforms 12' and 12".
  • FIGs. 5-9 illustrate mechanical details of tilt-turn operation of a 3-weeled vehicle as in Figs 1-4, including capability of simulating the advanced technique of "ski-skewing” for turning by skewing the platforms longitudinally (from uniformly side-by-side toe-to-toe for linear travel) such that the one nearer to the direction of the turn is advanced to lead the other by a designated amount that is proportional to the sharpness of the turn, in accordance with turning technique of expert snow skiers as described above.
  • Fig. 5 a top view of the 3-wheeled primary vehicle embodiment, shown, as in Fig.
  • a and B at the ends of spacer 20, approximating center front points of the platforms 12' and 12", points C and D, centered on each platform 12' and 12" above the axle assembly 18, forming a first parallelogram ABCD
  • a second parallelogram ABEF is formed by points E and F at the ends of spacer 22 and side AB at ends of spacer 20, shared with the thusly adjoined larger first parallelogram ABCD.
  • Fig. 6 a front view of the vehicle of Fig. 5 shows the second parallelogram ABEF as viewed from the front, showing the platforms 12' and 12" held level laterally by the user for the neutral steering condition, and thus the rear wheels 16' and 16"and front roller 14 are held aimed at zero azimuth angle for linear travel.
  • Figs. 7 and 8 are top and front views of the 3-wheeled vehicle, as in Figs. 5 and 6 but, shown here with the steering system reset to make a right hand turn (as shown in Fig. 9) in response to the user tilting the platforms 12' and 12 " each down at their right hand side.
  • Fig. 9 is a plan view showing the 3 -wheeled vehicle embodiment as in Figs. 1-8, with the steering system set, by user-tilt of the platforms 12' an 12", to make a sharp right hand turn by re- aiming the rear wheels 16' and 16"and front roller 14 as shown in broken lines, and advancing the right hand foot-platform 12" forward as shown, for "ski-skewing” technique as described above.
  • Fig.10 is a three-dimensional view of a 4-wheeled vehicle in a secondary embodiment of the present invention, similar to the 3 -wheeled primary embodiment in Figs. 1-4 except that, at the front, instead of a single central roller 14, a pair of similar rollers 14'are deployed, each in a caster-type angled-swivel stilt-steer mount that functions independently but acts in unison.
  • the two mounts are held spaced apart, typically separated symmetrically near the centers of the platforms, making a larger portion of the platforms stable for standing on than with a single central front roller, with regard to the unsupported outer front regions.
  • Figs. 11 and 12 show side and bottom views of the 4-wheeled vehicle of Fig.10 with the handling bars 30' and 32' cutaway, showing the spaced-apart locations, on cross-member spacers 20 and 21, of the tubular pivot journals 28' and 28" of the front tilt-steer mounts.
  • Fig.12 the bottom view, shows locations of the front pair of rollers 14' and 14" and rear pair of wheels 16' and 16".
  • Popular skateboards typically utilize a pair of trucks that each include an angle-swivel tilt- steer mount mechanism with a hinge king pin resiliently mounted at one end for limited swivel and shock cushioning, integrated with a pair of oppositely-extending in-line wheel axles.
  • a front truck and a rear truck are attached under the skateboard, oriented in mirror-image relationship for opposite front/rear wheel-pair aiming responsive to lateral tilting of the skateboard platform by the user.
  • the novelty and advantages of "ski-skewing" capability are provided in a 6-wheeled vehicle with the rear axle assembly and inclined front spacers as disclosed above, utilizing, for front-end support mount, a front truck with dual wheels attached under a front central region of each platform, oriented in mirror-image relation to the rear mounts regarding swivel angle.
  • a 2-wheeled version utilizes a rear axle assembly configured to support a rear vehicle portion on a single central roller instead of two end-located wheels, and an 8-wheeled version, made equivalent to two dual-truck skateboards connected by spacers that hold them parallel, forming a variable-angle parallelogram framework in the manner of the present invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

L'invention concerne un véhicule terrestre à pilote debout, servant à une simulation de ski sur neige, comprenant une paire de plateformes côte à côte, accouplées et supportées (a) à l'arrière par un support oblique de virage par inclinaison disposé sous chacune d'elles, intégré à un ensemble essieu partagé pourvu à ses extrémités d'une paire de roues arrière, situées sur des côtés opposés du véhicule, et (b) à l'avant par un système de support de virage par inclinaison comprenant une structure d'entretoise fixée à une paire de barres de direction d'utilisateur, et à au moins une roue avant, géneralement un cylindre, par l'intermédiaire d'un ensemble de support de type roulette pivotante inclinée associé. Cette combinaison novatrice accomplit un virage par inclinaison à deux plateformes en réaction aux mouvements du corps de l'utilisateur qui simule la technique de ski sur neige de niveau supérieur consistant à pencher les skis longitudinalement pour effectuer des virages inclinés comme en descente en zigzag. L'invention permet en réalité une auto-propulsion prolongée, en zigzag sur des surfaces planes en béton et pavées, générée uniquement par le biais des mouvements du corps de l'utilisateur pendant les virages et améliorée par des roues cylindriques à faible frottement permettant d'avancer en roue libre sur les lignes droites, et est ainsi apte à fournir, sur terrain sec, à la fois un plaisir récréatif et un entraînement et une pratique très efficaces pour le ski sur neige pour des skieurs sur neige de tous âges et de tous niveaux de compétence.
PCT/US2016/031265 2016-05-06 2016-05-06 Véhicule terrestre à pilote debout pour simulation de ski WO2017192150A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/US2016/031265 WO2017192150A1 (fr) 2016-05-06 2016-05-06 Véhicule terrestre à pilote debout pour simulation de ski
EP16901147.5A EP3452184A4 (fr) 2016-05-06 2016-05-06 Véhicule terrestre à pilote debout pour simulation de ski

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2016/031265 WO2017192150A1 (fr) 2016-05-06 2016-05-06 Véhicule terrestre à pilote debout pour simulation de ski

Publications (1)

Publication Number Publication Date
WO2017192150A1 true WO2017192150A1 (fr) 2017-11-09

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PCT/US2016/031265 WO2017192150A1 (fr) 2016-05-06 2016-05-06 Véhicule terrestre à pilote debout pour simulation de ski

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WO (1) WO2017192150A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113457101A (zh) * 2021-06-30 2021-10-01 成都体育学院 一种增强现实雪车雪橇模拟训练系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134600A (en) * 1977-04-25 1979-01-16 Mcdonald Benjamin J Roller ski apparatus with spring suspension
SU1621987A1 (ru) * 1988-10-31 1991-01-23 О.И, Соколова, Б.И. Соколов и Н.Б. Соколов Лыжероллеры
US5169166A (en) * 1991-09-03 1992-12-08 Brooks Paul F Steering mechanism
US5330214A (en) * 1991-09-03 1994-07-19 Brooks Paul F Simplified steering mechanism for skateboards and the like
US20120326403A1 (en) * 2011-06-22 2012-12-27 Henkel Lin Skateboard
US8448955B2 (en) * 2010-10-12 2013-05-28 Brent H. Kinnaman Three-wheeled skateboard

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Publication number Priority date Publication date Assignee Title
US3856321A (en) * 1972-10-20 1974-12-24 F Solymosi Wheeled board toy assembly
US4133546A (en) * 1977-03-28 1979-01-09 Frank Rosenblum Vehicle
WO2012038554A1 (fr) * 2010-09-23 2012-03-29 Inventra Ag Appareil pour sports de glisse ou de roulement pour le ski ou la planche à roulettes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4134600A (en) * 1977-04-25 1979-01-16 Mcdonald Benjamin J Roller ski apparatus with spring suspension
SU1621987A1 (ru) * 1988-10-31 1991-01-23 О.И, Соколова, Б.И. Соколов и Н.Б. Соколов Лыжероллеры
US5169166A (en) * 1991-09-03 1992-12-08 Brooks Paul F Steering mechanism
US5330214A (en) * 1991-09-03 1994-07-19 Brooks Paul F Simplified steering mechanism for skateboards and the like
US8448955B2 (en) * 2010-10-12 2013-05-28 Brent H. Kinnaman Three-wheeled skateboard
US20120326403A1 (en) * 2011-06-22 2012-12-27 Henkel Lin Skateboard

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3452184A4 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113457101A (zh) * 2021-06-30 2021-10-01 成都体育学院 一种增强现实雪车雪橇模拟训练系统

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Publication number Publication date
EP3452184A1 (fr) 2019-03-13
EP3452184A4 (fr) 2019-12-11

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