NZ241834A - Skateboard truck permits axle deflection - Google Patents

Description

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Patents Form No. 5 U.Z. PATENT GrFiCE -4 MAR 1992 RECEIVED NEW ZEALAND PATENTS ACT 1953 COMPLETE SPECIFICATION TRUCK FOR SKATEBOARD WE, FAR GREAT PLASTICS INDUSTRIAL CO., LTD., a p) company under the laws of Taiwan, Republic of China of No 855, Chung Shan Road, Kue-Jin Hsiang, Tainan Hsien, Taiwan, REPUBLIC OF CHINA hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: (followed by page la) 2418 TITLE: TRUCK FOR SKATEBOARD BACKGROUND OF THE INVENTION Field of Invention This invention relates to a truck, and more particular to a truck for a skateboard, roller skate or the like.

Description of the Prior Art — Trucks for skateboards or roller skates have been devised for mounting wheels to a skateboard or roller skate, and also 10 for providing resilient forces to the riders when riding on uneven surfaces. Conventional trucks for skateboards have seldom taken into consideration high maneuverbility, such as required in bow skating or the like. maneuverable. However, where too many metal parts are adapted to form a truck, the stresses may change its structure due to wear or fatigue and it may become dangerous to riders. invention which minimizes fastener means to the least and still provides high maneuverability as well as stability.

Some trucks have the ability of being highly The inventor, in view of this, has invented the present (followed by page 2} 241834 SUMMARY OF THE INVENTION It is the primary object of the present invention to provide a truck for a skateboard which solves the problems of conventional trucks consisting of complicated build-up parts.

It is a further object of the present invention to provide a truck for a skateboard which permits limited deflection of an axle relative to its suspension beam. It is another object of the present invention to 10 provide a truck for a skateboard which maintains a stability and maneuverability. p\ 1 &~L Q-> c 1 *£ C £ £ ;3£»- ;W ;2 ;2418 34 ;BRIEF DESCRIPTION OF THE DRAWINGS ;FIG. 1 is a perspective view of the present invention partly in section; ;FIG. 2A is a side cross sectional view of FIG. 1; 5 FIG. 2B is a similar view to FIG. 2 but illustrating weight being evenly distributed thereon; ;FIG. 3A is a sectional view taken transverse to the axis, and showing a left turning action; and ;FIG. 3B is a similar view to FIG. 5 but illustrating 10 a right turning action. ;3 ;241834 ;DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT ;Referring now to the drawings and in particular to FIG. 1 thereof, the skateboard 1 comprises a pair of identical trucks 2 being detachably anchored te> the 5 undersurface of the rearward and forward ends, ;respectively, by means of bolts and nuts 221 and 222 or as may be appreciated the trucks 2 may be formed as a unit with the base plate 1 out of a single piece of material. Since the construction of the two trucks 2 10 is identical, a description of one will suffice for both. Each truck 2 is composed of an integral suspension beam 21 having one end formed with the truck 2 and the other end formed with an axle hub 23, perpendicular to the centreline of the beam. ;The axle hub 23 has a passageway along its longitudinal 15 axis, and an integral circular bracket 24 formed therewith. There is formed at the center of the truck 2 a boss 22 extending downwardly and providing therewith a recess 2211 defining on the inner surface a generally circular flange 2212 that is provided with a 20 central opening 2213 for the projection therethrough an elastomeric member 3, which is generally of semi-spherical shape, having a circular groove 31 at top end thereon and a blind bore 32 in the middle top portion^^^T as shown in FIG. 2A. The groove 31 is sized to be ;'/ * \ engaged with the flange 2212 and having its bottom lr4 ii >1,0 3 portion seated on top of the bracket 24 when clampe"dN ^ ty i. C- ' by the flange 2212. 241834 ( When a rider's weight is evenly distributed on the base plate 1, as shown in FIG. 2B, the two suspension beams 21 will bent inwardly relative to the axle hub 23, respectively. The two elastomeric members 3 will 5 transform to permit limited deflection of the suspension beams 21 relative to the axle or axle hub 23 in response to weight shifting of rider. However, elastomeric member 3 will prevent the suspension beams fjrom deflecting too much. Likewise, when a rider is ~ 10 shifting his weight to one side or the other, for instance, as shown in FIGS. 3A & 3B, the base plate 1 will tilt toward the same direction which causes the elastomeric member 3 to transform which permits a limited deflection of the axle relative to the 15 suspension beam 21.

When skating on a bumpy road, the elastomeric member 3 will absorb part of the shocks as a supplementary shock absorber to the suspension beam 21 so that the base plate 1 is more stable relative to the 20 movements of wheels 5.

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Claims (5)

WHAT WE CLAIM IS:

1. A truck for a skateboard comprising: a beam integral at one end with a base plate and having an integral axle hub at the other end; a boss integral at a center portion with the base plate, extending downward and having an inner recess defining a circular flange and an opening; an elastomeric member of semi-spherical shape, seated in the recess of the boss, having a circular groove at a top portion, and a blind bore in a middle top portion; the axle hub being formed integral at the top portion with a circular bracket.

2. A truck for a skateboard of claim 1, wherein the circular groove of the elastomeric member is the same size as the flange of the boss.

3. A truck for a skateboard of claim 1, wherein the bracket is in alignment with the opening of the boss.

4. A truck for a skateboard of claim 1, substantially as herein described with reference to any one of the accompanying drawings.

5. A truck for a skateboard of any one of the preceding claims, substantially as herein described FAR GREAT PLASTICS INTERNATIONAL CO., LTD. By Their Attorneys BALDWII y