PLATE-FORME POUR PLANCHE A ROULETTES

TRUCK FOR SKATEBOARD

Abrégé anglais

ABSTRACT OF THE DISCLOSURE
A truck for a skateboard is composed of a beam
having one end being formed integral with the truck and
the other end being formed integral with an axle hub.
The truck has further comprising a boss extending
downward having an inner recess defining a circular
flange and an opening. The beam has integral at its
top with a circular bracket which is in align with
the opening of the boss. An elastomeric member is
generally semi-spherical in shape having a groove at
top end and a blind bore in top middle portion. The
outer diameter of the groove of the elastomeric member
equals to the diameter of the flange of the boss
allowing the groove to be clampped by the flange and
the bottom portion of the elastomeric member seats on
the bracket providing limited deflection of the beam
relative to the axle.

Revendications

I CLAIM:
1. A truck for a skateboard essentially comprising:
a beam being formed integral at one end with said
truck and having an integral axle hub at the
other end thereof;
a boss being formed integral at center portion
with said truck extending downward having an
inner recess defining a circular flange and an
opening;
an elastomeric member of semi-sepherical shape
having a circular groove at top portion, and a
blind bore in the middle top portion;
said axle hub being formed integral at top
portion with A circular bracket.
2. A truck for a skateboard of claim 1, wherein said
circular groove of said elastomeric member is sized the
same as of said flange of said boss.
3. A truck for a skateboard of claim 1, wherein said
bracket is in align with said opening of said boss, and
the distance

Description

J ~ J ~;~ i /;

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 skateboard or roller skate have been
devised for mounting wheels to a skateboard or roller
skate, and also for providing resilient force to the
riders when riding on uneven surface condition.
Conventional trucks for skateboard have seldom in the
consideration of high maneuverbility, such as ~ow
s~ating or the like.
Some trucks have the ability of high maneuvering.
However, too many metal parts were adapted to form a
truck, the compression may change its structure due to
wear or fatigue and may even harmful to riders.
The inventor, in view of this, has invented the
present invention which minimize fastener means to the
least and still provide high maneuverability as well as
stability.


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SUMMA~Y OF THE INVENTION
It is the primary object of the present invention to
provide a truck for a skateboard which solves the
problem of conventional truck 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 axle relative to suspension beam.
It is another object of the present invention to
provide a truck for a skateboard which maintains a
stability and maneuverability.



BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the present
invention partly in sectional;
FIG. 2A is a si~e cross sectional view of FIG. 1;
FIG. 2B is a similar view to FIG. 2 but illustrating
weight being eYenly 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
a right turning action.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring now to the drawings and in particular to
FIG. 1 thereof, the skateboard 1 comprise.s a pair of
identical tr~cks 2 ~ing detachably anchored to the
undersurface of the rearward and forward ends,
respectively, by means of bolts and nuts 221 and 222 or
as well 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
is identical, a description of one will suffice for
both, the 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, perpendicularly.
The axle hub 23 has a passageway along its longitudinal
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
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,
as shown in FIG. 2A. The groove 31 is sized to be
engaged with the flange 2212 and having its bottom
portion seated on top of the bracket 24 when clampped

by the flar.ge 2212.


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
transform to permit limited de~lection of the
suspension beams 21 relative to the axle or aYle hub 23
in response to weight shifting of rider. However,
elastomeric member 3 will prevent the suspension beams
from deflecting too much. Likewise, when a rider is
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 ~ame direction which causes the
elastome~ic member 3 to transform which permits a
limited deflection of the axle relative to the
suspension beam ~1.

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

Dessin représentatif