referring now to the diagrams , a skateboard - type vehicle generally shown in fig1 has a steel platform 10 , having a substantially rectangular shape with its corners removed . the steel platform 10 is cut from a one - quarter to three - eighth inch thick stock steel sheeting . the platform 10 is reinforced underneath by means of several steel supporting rectangular strips 12 also cut from a one - quarter inch to three - eighth inch stock steel sheeting and welded perpendicularly to the platform in a double &# 34 ; h &# 34 ; joist framework 14 . friction strips 16 attached to the upper surface of the platform assure good contact between the user &# 39 ; s shoes and the platform 10 . a shock absorbing protector strip 18 is placed along the entire edge of the platform 10 to protect the platform 10 as well as any objects with which the platform 10 may impact . as with other skateboard - type vehicles , the platform 10 rides upon two identical wheel pair assemblies , each shown generally as 20 . each wheel pair assembly 20 is fastened through a mounting structure containing a riser 22 , and shock absorbing pad 24 to an end of the underneath side of the platform 10 with four stove - type bolts 26 and matching nuts 28 . the riser 22 can be made of any conveniently stiff material and is used to prevent the platform 10 or reinforcement framework from contacting a wheel 30 or the wheel assembly 20 . the shock absorbing pad 24 can be made of any resilient material such as hard rubber and is used to absorb and distribute stresses which may be produced when the vehicle is in use . each wheel assembly 20 has an axle 32 with the reinforcement structure 34 joining the two identical wide wheels 30 at their extremities , through low friction bearings ( not shown ). each wheel 30 is shaped as the typical skateboard wheel : wide with round sides and cast of low rolling friction material . the forwardly inclined pivotal member 36 extends into a steering cavity receptacle 38 molded into the forward part of the wheel assembly base 42 . the forwardly inclined pivotal member 36 helps support the platform upon the wheel assembly while being free to turn within the steering cavity receptacle 38 . the supporting ring 40 is mounted above the center of the assembly base 42 with a resilient supporting structure containing two grommets 44 and 46 , which sandwich the supporting ring 40 and bolt 48 , washer 50 , and hexagonal nut 52 . the resilient supporting structure firmly attaches the supporting ring 40 to the assembly base 42 . the grommets 44 and 46 permit the axle 32 with reinforcement structure 34 and supporting ring 40 to move relative to the assembly base 42 . the washer 50 protects the lower grommet 46 from the hexagonal nut 52 . the forwardly inclined pivotal member 36 , steaerng cavity receptacle 38 and resilient supporting structure align the axle 32 with wheels such that the platform will travel in a straight - forward direction whenever the platform 10 is horizontal . however , when one of the sides of the platform 10 is tilted downwards or biased towards one of the sides , the forwardly inclined pivotal member 36 is urged to turn within the cavity receptacle 38 to the direction of the bias forcing the wheel pair to turn into the direction of the bias . the resilient supporting structure provides the support between the supporting ring 40 and the wheel assembly base 42 for a turning movement . the turning movement is approximately proportional to the amount the platform is biased . the wheels 30 of each wheel pair are separated from each other by approximately seven inches . the extended distance between the wheel pairs enhances the stability of this vehicle . a weight supporting , height adjustable and removable vertical upright assembly 54 is centrally attached to the platform 10 at the center of the platform 56 . the height adjustable feature for the upright 54 enables users of various statures to change the relative configuration of the vehicle . the removable feature enables the user to configure the vehicle into a skateboard which is very wide , and because of reinforcement , very strong . an interior , threaded plug 58 attaches internally threaded portions 60 of the bottom end of a sleeve 62 through a hole drilled through the center of the platform at 56 . the plug 58 is locked at the underneath side of the platform with a washer 64 and matching threaded nut 66 . another washer 65 separates the top surface 67 of the platform from the bottom end 69 of the sleeve . the sleeve 62 has numerous forwardly oriented apertures 68 spaced vertically along a section . the top exterior portion 70 of the sleeve is threaded while the interior of the top portion of the sleeve is beveled . a rod 72 with oppositely pointing side handles 74 welded to the top of the rod 72 in a &# 34 ; t &# 34 ; shape is dimensioned to snugly fit into the interior of the sleeve 62 . a forwardly oriented radial cavity 76 , drilled near a portion of the bottom of the rod contains a compression spring 78 , which urges a bullet - shaped plunger 80 with a round emergent end 82 from the cavity 76 . the round emergent end 82 is dimensioned so that the emergent end 82 extends through one of the forward apertures 68 on the sleeve , thereby locking the relative positions of the rod 72 within the sleeve 62 . referring to fig6 and 7 , a vertical channel 84 cut along the rearward portion of the rod 72 , aligns a circular compression structure 86 having a key stem 88 , a gap 90 , and its bottom portion inwardly beveled 92 to match the outwardly beveled portion 94 of the top of the sleeve 62 . the circular compression structure 86 lies upon the top of the beveled sleeve portion 94 and is dimensioned to snugly fit about the rod 72 . the key stem 88 , fit into the channel 84 prevents the circular compression structure 86 from turning about the rod 72 . a tubular tightener 96 with a top orifice 98 dimensioned for the diameter of the rod 72 , has the bottom orifice internally threaded 100 to match the exterior threads 102 of the top portion of the sleeve 62 . the rod 72 fits through the top orifice 98 of the tubular tightener 96 , and through the keyed circular compression structure 86 . the rod height is then adjusted to the desired level . the round emergent end of the plunger 82 may emerge through an aperture 68 locking the height of the rod 72 at a spaced interval . the tubular tightener 96 is threaded down upon the sleeve 62 urging the compression structure 86 into the sleeve . the matching beveled portions of the compression structure 86 close about the rod 72 thereby locking the rod 72 at an desired height relative to the sleeve 62 . resilient coverings 104 on the handles 74 provide a frictional , secure grasping surface for the user &# 39 ; s hands . the unique features of my scooter board enable the user to perform a variety of stunts heretofore not possible . fig8 demonstrates the scooter board and user in a jumping mode . the scooter board can either be still or moving while the user straddles the vertical upright with both feet on the board ; while relaxing his knees and grasping the handles the user pulls upward . the height of the jump will depend upon the skill and strength of the user . fig9 demonstrates a user straddling himself in an eagle - like fashion upon the handles of the scooter board . it is obvious that the scooter board can either be still or in motion . these and many other stunts are now possible . while i have described two stunts which can be performed on the scooter board , it is obvious that a variety of other stunts can now be performed limited only by the skill , strength and imagination of the user .
a skateboard - type vehicle of wide dimensions features a centrally located , weight supporting upright with laterally pointing handles . the height of the upright is adjustable and the platform is reinforced and has an edge protector . the novel features enable a user to control the direction of the board with the handles , to straddle in an eagle - like fashion upon the upright and to perform jumps with the skateboard .