(11) Publication Number 10-2008-0062416
`(43) Publication Date July 3, 2008
`(71) Applicant
` Jeong Hae JO
`105-902, Palm Spring Apt., Adong-dong,
`Paju-si, Gyeonggi-do
`(72) Inventor
` Jeong Hae JO
`105-902, Palm Spring Apt., Adong-dong,
`Paju-si, Gyeonggi-do
`(74) Attorneys
` Keon Cheol LEE, Young Soo JEONG
`
`(19) Korean Intellectual Property Office (KR)
`(12) Patent Laid-Open Publication (A)
`(51) Int. Cl.
`
`A63C 17/01 (2006.01)
`(21) Application Number 10-2006-0138203
`(22) Filing Date December 29, 2006
`Examination Request Date Not requested
`
`
`
`
`Total number of claims: 3 claims
`(54) Skateboard
`(57) Abstract
`The present disclosure relates to a skateboard, and an object of the present disclosure is to
`provide a skateboard which can travel smoothly in a stable posture effortlessly, and also,
`can make a U-turn with a short radius of curvature, by placing a rotation center shaft of
`footrests on an upper portion higher than a center axis of the footrests in a longitudinal
`direction.
`The skateboard of the present disclosure includes a front footrest 100, a rear footrest 110
`connected to the front footrest to be relatively rotatable, and two directional casters 120
`installed on bottom surfaces of the front footrest and the rear footrest, respectively. A front
`flange 101 and a rear flange 111 sequentially protrude upward from opposite ends of the
`front footrest and the rear footrest in close contact with each other. Upper ends of the front
`flange and the rear flange are connected by a rotation shaft 130 to be relatively rotatable,
`and the rotation shaft 130 which is a center of rotation of the footrests is installed higher
`than a center axis C of the footrests in a longitudinal direction by a predetermined height.
`Representative Figure - Fig 2
`
`100
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`1
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` DGL Exhibit 1012
`Page 0001
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`

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`Claim 1
`
`Claims
`
`A skateboard comprising a front footrest 100, a rear footrest 110 connected
`to the front footrest to be relatively rotatable, and two directional casters 120
`installed on bottom surfaces of the front footrest and the rear footrest,
`respectively,
`wherein a front flange 101 and a rear flange 111 sequentially protrude
`upward from opposite ends of the front footrest and the rear footrest in close
`contact with each other,
`wherein upper ends of the front flange and the rear flange are connected by a
`rotation shaft 130 to be relatively rotatable, and the rotation shaft 130 which
`is a center of rotation of the footrests is installed higher than a center axis C
`of the footrests in a longitudinal direction by a predetermined height.
`
`Claim 2
`
`The skateboard of claim 1,
`wherein the rotation shaft 130 is installed through two bearings 140 which
`are installed in the front flange 101 and the rear flange 111, respectively.
`
`Claim 3
`The skateboard of claim 1 or 2,
`wherein an arc rotation restriction groove 102 is formed on any one or both
`of a lower end of the front flange 101 and a lower end of the rear flange 111,
`and a rotation restriction pin 150 is inserted into the rotation restriction
`groove to make the front footrest and the rear footrest engage with each
`other.
`
`Specification
`
`Detailed Descriptions of the Invention
`
`Object of the Invention
`
`Technical field to which the invention belongs and Background art
`of the field
` The present invention relates to a skateboard, and more particularly, to a
`skateboard which can travel smoothly in a stable posture effortlessly, and
`also, can make a U-turn with a short radius of curvature, by placing a rotation
`center shaft of footrests on an upper portion higher than a center axis of the
`footrests in a longitudinal direction.
`
` In general, a skateboard is leisure sport equipment that has wheels
`installed on lower portions of a plate-shaped footrest, on which a user puts
`both feet as shown in FIG. 1, and allows a user to perform various maneuvers
`by putting two feet on the footrest and obtaining propulsion by moving in a
`zigzag pattern with one foot, or by putting one foot on the board and
`
`2
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` DGL Exhibit 1012
`Page 0002
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`

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`obtaining propulsion by pushing off the ground with the other foot.
`
` However, since such a skateboard obtains propulsion by a rider’s body
`motion or an inclined surface, there is a limit to getting continuous and
`smooth mobility and much force may be required for a body motion for
`obtaining propulsion, and it may be difficult to make speed thrill.
`
` Considering disadvantages of the skateboard, a skateboard which can
`easily obtain propulsion and can make speed thrill has been suggested.
`
` An example of such a skateboard is disclosed in Korean Patent
`Registration Number 420911. As shown in FIG. 1, the skateboard includes a
`front footrest, a rear footrest, two directional casters installed on bottom
`surfaces of the front footrest and the rear footrest, respectively, and a twist
`pipe connecting the front footrest and the rear footrest. The twist pipe is
`formed by installing leaf springs in two pipes installed on bottom surfaces of
`the front footrest and the rear footrest, respectively, and connecting the leaf
`springs. Korean Patent Laid-Open Publication No. 2006-128798 discloses
`that a front footrest and a rear footrest of a skateboard are connected by a
`torsion bar. In addition, there is disclosed a skateboard in which a front
`footrest and a rear footrest are connected by a torsion bar to be aligned with a
`center axis thereof in a longitudinal direction.
`
`
`For example, when a user puts the left foot on the front footrest
`
`
`and puts the right foot on the rear footrest and rolls the footrests from side to
`side with reference to the center axis of the front footrest and the rear footrest
`in the longitudinal direction, the leaf springs embedded in the twist pipe are
`elastically deformed due to relative twist movement of the two pipes and are
`restored to the original state, so that direction is changed or propulsion is
`generated and the skateboard may travel.
`However, in the related-art skateboard described above, the rotation center
`axis of the footrests, that is, the center shaft of the twist pipe, and the center
`axis of the footrests in the longitudinal direction are very close to each other,
`and accordingly, a radius of rotation of the footrests rotating with reference
`to the center shaft of the twist pipes is small. To this end, a user should
`frequently roll the footrests from side to side in order to obtain propulsion,
`and direction changing is repeated swiftly. Accordingly, it is difficult for the
`user to ride the skateboard smoothly and to have speed thrill, and for
`example, the radius of curvature increases when the user makes a U turn, and
`it may be difficult to make a U turn on a narrow road. These disadvantages
`may be intensified when the front footrest and the rear footrest of the
`skateboard are connected by a torsion bar to be aligned with the center axis
`thereof in the longitudinal direction. In addition, since elastic members such
`as the twist pipe or torsion bar are rapidly restored after being deformed,
`there may be a problem that it is difficult to maintain balance on the
`skateboard.
`
`
`
`3
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` DGL Exhibit 1012
`Page 0003
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`

`

`Technical Object to be achieved by the invention
`The present disclosure has been developed by considering the
`above-described problems of the related-art skateboards, and an object of the
`present disclosure is to provide a skateboard which can travel smoothly in a
`stable posture effortlessly, and also, can make a U-turn with a short radius of
`curvature, by placing a rotation center shaft of footrests on an upper portion
`higher than a center axis of the footrests in a longitudinal direction.
`
`Construction and Operation of the Invention
`To achieve the above-described object, a skateboard includes a front footrest,
`a rear footrest connected to the front footrest to be relatively rotatable, and
`two directional casters installed on bottom surfaces of the front footrest and
`the rear footrest, respectively, wherein a front flange and a rear flange
`sequentially protrude upward from opposite ends of the front footrest and the
`rear footrest in close contact with each other, wherein upper ends of the front
`flange and the rear flange are connected by a rotation shaft to be relatively
`rotatable.
`According to the present disclosure, the rotation shaft may be installed
`through two bearings which are installed in the front flange and the rear
`flange, respectively.
`In addition, an arc rotation restriction groove may be formed on any one or
`both of a lower end of the front flange and a lower end of the rear flange, and
`a rotation restriction pin may be inserted into the rotation restriction groove
`to make the front flange and the rear flange engage with each other.
`Features and advantages of the present disclosure are more clarified by the
`following detailed descriptions based on the attached drawings. Prior to this,
`terms or words used in the specification and the claims should be interpreted
`as meanings and concepts conforming to the technical concept of the present
`disclosure, based on the principle that inventors can define concepts of terms
`appropriately in order to explain their invention in the best way.
`FIGS. 2 to 4 illustrate a skateboard according to embodiment 1 of the present
`disclosure.
`The skateboard of the present embodiment includes a front footrest 100, a
`rear footrest 110, and two directional casters 120 which are installed on
`bottom surfaces of the front footrest 100 and the rear footrest 110,
`respectively.
`
`
`
`The front footrest 100 and the rear footrest 110 are connected with each other
`to be relatively rotatable within a predetermined angle range.
`That is, a front flange 101 and a rear flange 111 sequentially protrude
`upward from opposite ends of the front footrest 100 and the rear footrest 110
`in close contact with each other. The flanges 101, 111 may be integrally
`formed with the footrests 100, 110, and also, may be fixed by a fastening
`means, for example.
`
`4
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` DGL Exhibit 1012
`Page 0004
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`

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`In addition, upper ends of the front flange 101 and the rear flange 111 are
`connected with each other by a rotation shaft 130 to be relatively rotatable as
`shown in FIGS. 2 and 5.
`Accordingly, since the rotation shaft 130 which is a center of rotation of the
`front footrest 100 and the rear footrest 110 is spaced far apart from a center
`axis (C) (see FIG. 4) of the footrest 100, 110 in a longitudinal direction, and
`is positioned higher than the center axis, the radius of rotation of the footrests
`100, 110 may increase, and accordingly, a user may easily obtain propulsion
`of the skateboard without having to push the footrests 100, 110 frequently,
`and also, may smoothly change direction, and may make a U turn with a
`short radius of curvature when making a U turn. In addition, in the present
`disclosure, the footrests 100, 110 are not connected through an elastic
`member, and are connected with each other by the rotation shaft 130, so that
`a user can easily maintain balance on the skateboard by pushing the footrests
`100, 110 from side to side.
`FIGS. 6 and 7 illustrate a skateboard according to embodiment 2 of the
`present disclosure.
`The skateboard of the present embodiment is the same as the configuration
`of embodiment 1 described above, except that the rotation shaft 130 is
`installed through two bearings 140 installed in the front flange 101 and the
`rear flange 111, respectively.
`Accordingly, in the case of the skateboard of the present embodiment, when
`the footrests 100, 110 are rotated, the bearings 140 are rotated with reference
`to the rotation shaft 130. Accordingly, the footrest 100, 110 may be smoothly
`rotated, and also, the footrest 100, 110 may be prevented from wearing down
`by the rotation shaft 130.
`FIGS. 8 and 9 illustrate a skateboard according to embodiment 3 of the
`present disclosure.
`The skateboard of the present embodiment is formed based on the
`skateboard of embodiment 1 described above, wherein an arc rotation
`restriction groove 102 is formed on any one or both of a lower end of the
`front flange 101 and a lower end of the rear flange 111 and a rotation
`restriction pin 150 is inserted into the rotation restriction groove 102 to make
`the front flange 101 and the rear flange 111 engage with each other, and
`safety is secured by restricting a rotation angle of the footrests 100, 110. The
`other configuration is the same as the configuration of embodiment 1.
`When the rotation restriction grooves 102 are formed on both of the front
`flange 101 and the rear flange 111 in the skateboard of the present
`embodiment as shown in FIG. 8, both ends of the rotation restriction pin 150
`are inserted into the rotation restriction grooves 102 on both sides, and
`accordingly, when the footrests 100, 110 are rotated, the rotation restriction
`grooves 102 are rotated while sliding on the rotation restriction pin 150, and
`accordingly, the rotation angle of the footrests 100, 110 may be restricted by
`an angle being two times larger than an angle of the rotation restriction pin
`
`5
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` DGL Exhibit 1012
`Page 0005
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`

`

`150 caught by ends of the rotation restriction grooves 102, that is, an angle
`formed by the rotation restriction grooves 102.
`In addition, when the rotation restriction groove 102 is formed only on any
`one of the flanges 101, 111, although this is not illustrated, one end of the
`rotation restriction pin 105 is inserted into and fixed to the other flange
`where the rotation restriction groove 102 is not formed, and the other end of
`the rotation restriction pin 150 is inserted into the rotation restriction groove
`102. Accordingly, the rotation angle of the footrests 100, 110 may be
`restricted as much as an angle formed by the rotation restriction groove 102.
`FIG. 10 illustrates a skateboard according to embodiment 4 of the present
`disclosure, and the skateboard of the present embodiment is formed by
`applying the rotation restriction groove 102 and the rotation restriction pin
`150 mentioned in embodiment 3 to the skateboard of embodiment 2 to which
`the bearing 140 is applied. The other configuration is the same as the
`configuration of embodiment 2.
`
`Effects of the Invention
`According to the skateboard according to the present disclosure as described
`above, the rotation shaft 130 which is the center of rotation of the front
`footrest 100 and the rear footrest 110 is spaced far apart from and higher than
`the center axis C of the footrests 100, 110 in the longitudinal direction, so
`that the radius of rotation of the footrests 100, 110 noticeably increases
`compared to a related-art skateboard employing a twist pipe or a torsion bar.
`Therefore, a user can easily obtain propulsion of the skateboard without
`having to pushing the footrests 100, 110 frequently, and can ride the
`skateboard effortlessly.
`In addition, the user can ride the skateboard while smoothly changing
`direction, and can enjoy skateboarding nicely.
`In addition, the user can make a U turn with a short radius of curvature when
`making a U turn, and can easily make a U turn even on a narrow road.
`In addition, an elastic member such as a twist pipe or a torsion bar is not
`applied, so that it is easy to maintain balance on the skateboard and a novice
`can get used to skateboarding rapidly.
`
`Brief Description of the drawings
`FIG. 1 is a top view illustrating an example of a related-art skateboard;
`FIG. 2 is a perspective view illustrating a skateboard according to
`embodiment 1 of the present disclosure;
`FIG. 3 is a top view illustrating the skateboard according to embodiment 1 of
`the present disclosure;
`FIG. 4 is a front side view of FIG. 3;
`FIG. 5 is a cross-sectional view of a main part of the skateboard according to
`embodiment 1 of the present disclosure;
`
`6
`
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`
` DGL Exhibit 1012
`Page 0006
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`

`

`FIG. 6 is a perspective view illustrating a skateboard according to
`embodiment 2 of the present disclosure;
`FIG. 7 is a cross-sectional view of a main part of the skateboard according to
`embodiment 2 of the present disclosure;
`FIG. 8 is a cross-sectional view of a main part of a skateboard according to
`embodiment 3 of the present disclosure;
`FIG. 9 is a cross-sectional view taken on line A-A of FIG. 8A; and
`FIG 10 is a cross-sectional view of a main part of a skateboard according to
`embodiment 4 of the present disclosure.
`
`
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`140: bearing,
`
`
`<Explanation of Signs of Main Parts of the Drawings>
`100: front footrest,
`
`
`101: front flange,
`102: rotation restriction groove,
`110: rear footrest,
`111: rear flange,
`
`
`120: directional caster,
`130: rotation shaft,
`
`C: center axis of footrests in a
`longitudinal direction,
`150: rotation restriction pin.
`
`
`
`
`
`7
`
`
`
` DGL Exhibit 1012
`Page 0007
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`

`

`FIG. 1
`
`Drawings
`
`FIG. 2
`
`FIG. 3
`
`8
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` DGL Exhibit 1012
`Page 0008
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`

`

`FIG. 4
`FIG. 4
`
`FIG. 5
`FIG. 5
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`
`
`
`FIG. 6
`FIG. 6
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`
` 9
`
`9
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`DGL Exhibit 1012
`Page 0009
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` DGL Exhibit 1012
`Page 0009
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`

`

`FIG. 7
`FIG. 7
`
`FIG. 8
`FIG. 8
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`
`
`10
`10
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`
`
`DGL Exhibit 1012
`Page 0010
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` DGL Exhibit 1012
`Page 0010
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`

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`FIG. 9
`FIG. 9
`
`FIG. 10
`FIG. 10
`
`
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`
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`Pee Seed
`
`
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`
`
`11
`11
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`DGL Exhibit 1012
`Page 0011
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` DGL Exhibit 1012
`Page 0011
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`

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`
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`Korean to English
`SPB2210001HQ
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`Hye - KR20080062416A_Original_document_20210908163630
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`DGL Exhibit 1012
`Page 0012
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` DGL Exhibit 1012
`Page 0012
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