Skateboard and accessory

An accessory for a skateboard which comprises a plastic wedge with through apertures for receiving fasteners to secure the wedge to selected portions of a skateboard. The wedge has dimensions of a width approximating the width of the skateboard and a length permitting it to be mounted behind the rear truck on the undersurface of a skateboard with its thick, trailing edge adjacent the rear edge of the skateboard, whereby the wedge can serve as a skid or pivot plate. The wedge also has appropriate dimensions and an occluded angle permitting it to be mounted on the upper surface of a skateboard at the fore and aft ends to convert a skateboard having a flat deck to a single or double kicktail board.

BACKGROUND OF THE INVENTION 
1. Field of the Invention 
This invention relates to an accessory for a skateboard and, in particular, 
to the combination of a skateboard having one or more of the accessories. 
2. Brief Description of the Prior Art 
There are presently a number of designs of skateboards on the market such 
as the kicktail and double kicktail which have the aft or aft and fore 
ends of the skateboard deck inclined upwardly at an angle of about 
15.degree., thereby permitting the rider to perform pivotal movements such 
as wheelies and the like without scraping the end of the skateboard on the 
pavement. Other skateboard decks are flat relatively rigid members 
commonly formed of laminated hardwoods and flexible decks formed of metal 
or fiber-reinforced plastics. 
Complex maneuvers performed by riders frequently cause the aft end of the 
skateboard to contact the pavement, resulting in abnormal wear on the 
board and often causing spills because of the frictional drag of the board 
on the pavement. Metal skid plates have been employed to prevent or reduce 
the wear on the skateboard, however, these plates mark the pavement 
surface and are particularly objectionable when the skateboards are used 
on easily marred pavements such as swimming pools and the like. 
It is also desirable to have the capability of converting a skateboard from 
a flat platform style to a kicktail or double kicktail. 
BRIEF STATEMENT OF THE INVENTION 
This invention comprises an accessory for skateboards and the combination 
of a skateboard modified with the accessory. 
The accessory of the invention comprises a plastic wedge having attachment 
means permitting its attachment to any of several selected locations on a 
skateboard. The preferred attachment means comprises a plurality of 
through apertures to receive fasteners, screws and the like whereby the 
accessory can be removably attached to a skateboard surface. The wedge has 
a width approximately the width of a skateboard and a length which permits 
it to be mounted behind the rear truck on the undersurface of a skateboard 
with its sharp leading edge adjacent the rear edge of the aft truck and 
its thick, trailing edge adjacent the rear edge of the skateboard. The 
wedge has an occluded angle of from 5 to about 20, preferably from 7 to 
about 15, degrees, thereby permitting the wedge to be mounted on the upper 
surface of a flat decked skateboard whereby such skateboard can be 
modified to a kicktail or double kicktail board. 
The wedge is formed of a suitable wear resistant plastic, preferably a 
plastic having a very low coefficient of friction such as Celcon, Teflon, 
Nylon and the like.

DESCRIPTION OF THE PREFERRED EMBODIMENTS 
Referring now to FIG. 1, the accessory wedge of the invention is shown as a 
wedge member 10 having a sharp leading edge 12 and a thick trailing edge 
14. The wedge is defined by opposite, planar faces 16 and 18 with upright 
or generally perpendicular sidewalls, such as 20, and rear wall 22. The 
wedge has an occluded angle from 5 to about 20, preferably 7 to about 15, 
and most preferably 10 to 15, degrees. The wedge is provided with 
attachment means 24 in the form of a plurality of through apertures 26 to 
receive fastening means such as screws, bolts and the like. The apertures 
26 are counterbored at 28 with a larger diameter bore to provide a 
recessed cavity for recessed reception of the heads of the fastening 
means. 
Referring now to FIG. 2, there is illustrated a skateboard 30 having a 
platform 32 with a substantially flat or planar deck 34. The skateboard is 
provided with conventional fore and aft trucks 36 and 38 which carry an 
axle 40 rotatably mounted therein in suitable bearings. The axles are 
supported by the trucks with provision for tilting movement of the axle 
about a mounting axis 42. To this end, the mounting axis 42 is engaged in 
a shock cushioning member 44 formed of a resilient plastic such as 
polyurethane and the like. The skateboard wheels 46 are carried on the 
distal portions of the truck axles 40. 
The accessory wedge 10 of the invention is employed as a frictional 
resistant skid member by mounting the wedge 10 with its sharp leading edge 
12 adjacent the rear edge 48 of the aft truck 38 and with its thick 
trailing edge 22 adjacent the rear edge 50 of the skateboard platform 32. 
The wedge 10 has a width approximating the width of the platform 32 
whereby it extends across substantially the entire width of the trailing 
edge 50 of platform 32. In this position, the accessory wedge serves as a 
low frictional member to provide a frictional resistant contact with 
pavement and the like during maneuvering actions such as wheelies and the 
like and prevents wear of the rear edge of the skateboard platform 32 and 
avoids any marking or defacing of pavement. 
Referring now to FIG. 3, the invention is shown as employed on a skateboard 
52 which has fore and aft trucks 36 and 38, respectively, which are 
substantially of the same construction as previously described. The 
skateboard platform 53, however, does not have a flat deck as the 
skateboard previously described. Instead, the distal portion 54 of 
platform 53 is inclined upwardly at an angle of about 15.degree. in the 
manner characteristic of the "kicktail" skateboard platforms. 
The accessory wedge 10 of the invention is employed on the aforedescribed 
skateboard by mounting the wedge 10 beneath the undersurface of the 
inclined portion 54 of the kicktail skateboard with the sharp leading edge 
12 of the wedge adjacent the inflection line between the flat portion and 
inclined portion 54 of platform 34. In this position, the rear edge 14 of 
the wedge 10 will be substantially coextensive with the rear edge 56 of 
the skateboard. The accessory wedge 10 in this fashion serves also as a 
low frictional member to prevent wear on the skateboard, defacing of the 
pavement and also provides a bearing contact surface of low drag 
characteristics which will not unduly impede free movement of the board 
such as could cause accidental falls and the like. 
The wedge 10 of the invention can also be employed at the fore end of a 
skateboard on the upper surface in the manner illustrated by the broken 
line portion of FIG. 3. In this mounting, the thick edge 14 of the 
accessory wedge 10 is mounted coextensively with the leading edge 58 of 
the platform 53. In this fashion, the wedge 10 serves to convert the 
single kicktail skateboard into a double kicktail skateboard. 
Referring now to FIG. 4, the invention is illustrated on a skateboard 60 
having a substantially flat platform 62. Two accessory wedges 10 and 10' 
are shown mounted on the undersurface and uppersurface, respectively, of 
the aft portion 64 of the skateboard. In this position, the accessory 
wedge 10 serves as an antifriction contact member to provide a low drag 
bearing contact with the pavement when the board is inclined in the 
illustrated manner, characteristic of a maneuvering or wheelie movement. 
The wedge shape of this member avoids unintended contact with the wheel 46 
of the skateboard when the latter is deflected in the manner shown by 
arrowhead line 66 from the normal position A shown in solid lines to the 
maximum deflected position B shown in broken lines. This deflection occurs 
upon tilting of the board when the rider shifts his weight. 
The second accessory wedge 10' of the invention serves in the illustrated 
position as a kicktail member providing an inclined raised upper surface 
to the deck 68 of the platform 62 whereby the skateboard is provided with 
improved kicktail characteristics for maneuvering movements. 
The accessory wedge 10 is formed of plastics having high wear and abrasion 
resistance and low coefficients of friction. While various plastics can be 
employed for this purpose, the following are preferred materials: acetal 
resins such as acetal copolymer molding resins, e.g., Celcon, Delrin; 
fluoroplastics such as Teflon, PFA, FEP; Nylons; polycarbonates; rigid 
polyesters, polysulfones; and vinyl chloride-acetate molding compounds. 
Any of the aforementioned materials can be fiber reinforced or filled, 
typically with glass fibers or with fluoroplastics fibers which can 
constitute from 10 to about 40 weight percent of the composition. Of the 
aforementioned materials, the aforementioned acetal copolymer Celcon is 
the preferred material. 
The invention has been described and illustrated with the presently 
preferred embodiment. It is not intended that the invention be unduly 
limited by this description of the ilustrated and preferred embodiment. 
Instead, it is intended that the invention be defined by the means, and 
their obvious equivalents, set forth in the following claims.