Telescoping hurdle with base adapter

A playground base and standard assembly (10) includes a typical hollow traffic cone (28) having a top hole (20) for receiving a standard (12) into the cone (28). The cone (28) is modified by placing an insert (26) inside the cone for stabilizing the standard (12). The insert (26) is a solid polyethylene foam member shaped to fit snugly in the cone (28). The insert (26) has a hole (34) coaxial with a top hole (20) on the cone (28) for receiving and supporting any standard (12). One possible standard (12) includes telescoping members (40,42) for adjusting the height of the standard.

TECHNICAL FIELD 
The subject invention relates to playground or gym equipment, and more 
specifically to bases for supporting gym standards or poles. 
BACKGROUND OF THE INVENTION 
All school playgrounds and gyms use standard hollow traffic cones for a 
variety of purposes. However, as of yet there has been no effective way 
for the cones to be used as base standards. An end of a pole could be 
placed through the top hole in the cone, with the remainder of the pole 
extending upwardly. These poles could be used in turn to support hurdle 
bars and hockey goals, among other things. Unfortunately, the traffic 
cones do not support the poles well because the top hole in the cone is 
often too large for the pole and because there is nothing within the 
hollow cone to support the end of the pole which is in the hollow space. 
In other words, the pole does not fit snugly within the cone. Thus, when a 
force is applied to the end of the pole which is outside the cone, there 
is no counter force at the pole's other end to stabilize the pole. The 
pole merely pivots around the top hole. Needless to say, this arrangement 
leaves something to be desired. 
U.S. Pat. No. 4,232,862 teaches the use of an adapter on the end of a pole 
in order to stabilize the pole in the top hole of a traffic cone. The 
adapter is simply a tube having a flange end for engaging the top hole and 
preventing the tube from passing completely through the top hole and into 
the hollow space defined by the cone. Unfortunately, the adapter only 
reduces the space between the pole and the top hole: it does not prevent 
the end of the pole from moving about the hollow space within the cone. 
The adapter may provide some additional support for a pole extending 
horizontally from the cone; but the adapter provides little or no 
additional support for poles extending vertically from the cone. 
SUMMARY OF THE INVENTION AND ADVANTAGES 
A playground base and standard assembly comprises support means including a 
base, a top, a conical wall extending between the base and the top, a top 
hole through the top and a base hole through the base. The support means 
also includes a conical inner space defined by the wall and extending 
between the base hole and the top hole. The assembly is characterized by 
including stabilizing means for supporting a standard disposed within the 
inner space and for engaging the conical wall in order to eliminate 
movement of the standard with respect to the support means. 
The stabilizing means thus acts as an adapter for standard traffic cones, 
allowing them to be used effectively as support bases for gym standards. 
These standards could support a hurdle, or goals for hockey and soccer, 
for example. This saves the schools money because it enables schools to 
make use of a product which they already have: schools therefore need not 
buy a new base. 
The subject invention further provides a light weight, easy to assemble 
base. Since the base is so light, young children can move it. This saves 
the time and energy of the gym teacher or playground supervisor. Also, the 
base can be assembled and disassembled easily: the parts all fit snugly 
together and do not require tools or screws. Since the assembly breaks 
down into small pieces it requires little space for storage.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
The playground base and standard assembly generally shown at 10 comprises 
support means generally indicated at 28 including a base 14, a top 16 and 
a conical wall 18 extending between the base 14 and the top. The assembly 
10 also includes a top hole 20 through the top 16, a base hole 22 through 
the base 14 and a conical inner space 24 defined by the wall 18 and 
extending between the base hole 22 and the top hole 20. The assembly 10 is 
characterized by including stabilizing insert means generally indicated at 
26 for supporting a standard generally indicated at 12 disposed within the 
inner space 24 and engaging the standard 12 and the conical wall 18 for 
eliminating movement of the standard 12 with respect to the support means 
28. 
The support means 28 is a standard traffic cone of the type used on 
roadsides. This type of cone 28 is also widely used by schools for a 
variety of purposes--often recreational. Typically made from flexible 
plastic or rubber, the cone 28 comes in various sizes. For purposes of the 
subject invention, no particular size is more beneficial than any other. 
Although sometimes, cones made from more flexible material may be more 
desirable for reasons stated below. The stabilizing means 26 may be 
adapted to fit any size. The base hole 22 of the traffic cone 28 is larger 
than the top hole 20. And the cone 28 becomes more narrow as one views it 
from the base 14 to the top 16. For purposes of the subject invention, it 
is intended that the base 14 be placed on the ground or other horizontal 
surface, and that the top 16 is thereby supported above such surface. 
The stabilizing means 26 comprises a polyethylene foam member. This 
material is desirable because it is so inexpensive and durable. 
Polyethylene foam is available as stock extruded in cylindrical shapes of 
various sizes. It is therefore simple to adapt the material to fit in a 
cone 28 simply by cutting or machining the cylindrical stock. Other 
suitable materials may be used, the cheaper and softer (i.e. safer) ones 
being the most desireable. The stabilizing means 26, or foam member, 
includes a top end 30 and a bottom end 32, with the top end 30 including a 
receiving hole 34 for receiving the standard 12. The receiving hole 34 is 
disposed coaxial with the top hole 20 of the support means 28. This 
usually involves locating the receiving hole 34 concentric with the foam 
member 26. The receiving hole 34 may be of any diameter, but should be 
sized so that the specific standard to be used fits snugly within the hole 
34. The hole 34 may extend completely through the foam member or be fairly 
shallow, depending on the weight of the standard to be supported. 
Generally, the hole 34 extends about one third of the way into the foam 
member 26. The foam member 26 has a cylindrical portion 36 disposed 
adjacent the bottom end 32 and a frustuconical portion 38 disposed between 
the cylindrical portion 36 and the top end 30. The respective portions 
36,38 are roughly equal in length. In other words, the cylindrical portion 
36 extends from the bottom end 32 about halfway up the foam member 26, 
while the frustuconical portion 38 extends from the halfway point, or 
where the cylindrical portion 36 ends, up to the top end 30 of the foam 
member 26. The frustuconical portion 38 has a pitch or angle similar or 
identical to the pitch or angle of the conical wall 18 of the traffic cone 
28. This is so that the surface of the frustuconical portion 38 fully 
contacts the inner part of the conical wall 18 when the foam member 26 is 
inserted into the cone 28 a predetermined amount. 
The stabilizing means 26, or foam member, is disposed through the base hole 
22 of the support means 28 so that the bottom end 32 of the stabilizing 
means 26 is flush with the base 14 of the support means 28. The support 
means 28 and the stabilizing means 26 have surfaces engaging for aligning 
the top hole 20 and the receiving hole 34. In some cases, the top of the 
cylindrical portion 36 (the part adjacent the frustuconical portion 38) 
engages the wall whereby the stabilizing means 26 is fixed within the 
space 24. In such a case, (as shown in FIG. 2) the wall of the cone 28 
must stretch to accommodate the foam member 26. Here, the surface area of 
contact between the foam member and the conical wall 18 of the cone 28 may 
be no more than a narrow band, or annulus. But this amount of contact is 
sufficient for purposes of stabilizing a standard 12. Preferably, the 
frustuconical portion 38 engages the wall whereby the stabilizing means 26 
is fixed within the space 24. Here, the entire surface of the 
frustuconical portion 38 engages the conical wall 18. This is more 
desirable than the case with the band contact because there is more 
surface area contact between the cone 28 and the foam member 26, and thus 
more stability. Whether the surface area contact is greater or lesser, as 
described above, depends on tolerances. If the fit between the inner part 
of the conical wall 18 and the frustuconical portion 38 is off, the fit 
will be more in the area of the cylindrical portion 36, and therefore more 
circular. Whatever the arrangement, the foam member 26 should fit snugly 
within the cone 28 so that the foam member does not move with respect to 
the cone 28. 
The assembly 10 may be complete as described above. Any suitable standard 
12 may be supported by the assembly 10. 
In order to specifically make a hurdle of the type generally indicated at 
15, one can also include a standard 12 having a lower member 40 for 
engaging within the support means 28. The lower member 40 is a hollow 
cylindrical tube 40 made from plastic or other suitable material. 
The standard 12 includes an upper tubular member 42 disposed in telescoping 
engagement with the lower member 40 for providing height adjustability to 
the standard 12. The hurdle further includes a horizontal member 44 
extending perpendicularly from the upper member 42 of the standard 12. The 
upper member 42 is a hollow plastic tube. The horizontal member 44 is also 
a hollow plastic tube. The horizontal member 44 has a first end 48 
disposed adjacent to or over said elbow joiner, and a second end 50 
disposed opposite from said first end. 
Each of the three tubes 40,42,44 is preferably cut from a length of 
extruded plastic tube. This is a very safe, inexpensive material to use as 
a standard 12 for a hurdle 15. 
The hurdle 15 also includes horizontal support means 46 for supporting the 
horizontal member 44 at a predetermined angle with respect to the upper 
member 42. The horizontal support means 46 includes an elbow joiner 46. 
This is a typical off-the-shelf pipe fitting joiner. This elbow joiner 46 
is disposed between the upper member 42 and the horizontal member 44 so 
that the upper and horizontal members form a right angle. The elbow 46 
includes a first prong for fitting in the cylindrical space of the upper 
member 42, and a second prong for fitting in the cylindrical space at a 
first end 50 of the horizontal member 44. 
Finally, since the horizontal member 44 is a cut length of extruded hard 
plastic tube, the ends of the tube may have a sharp edge. For safety 
reasons, the second end 50, or the end away from the elbow joiner 48, i.e. 
the end at the free end of the member 44, should be covered somehow. In 
the preferred embodiment, a plastic or rubber cup or cap 52 should be used 
to cover the free or second end 50. This cap 52 can be bought "off the 
shelf." 
In the assembled state, the hurdle 15 should include the lower member 40 
having one end disposed through the top hole 20 of the cone 28 and the 
receiving hole 34 in the foam member 26. The upper tube member 42 should 
fit telescopingly over or in the lower member 40. Preferably, the upper 
member 42 fits within the lower member 40. An elastic washer or "O" ring 
can be placed around the upper member 42 somewhere along its length. Since 
the "O" ring cannot fit into the lower member 40, the washer will limit 
the extent to which the upper member 42 engages within the lower member 40 
and maintain the hurdle cross bar at a predetermined height. The elbow 
joiner 46 fits in the end of the upper member 42 opposite the end which 
engages within the cone 28. The first end 48 of the horizontal member 44 
then engages over the elbow joiner, and is maintained in a horizontal 
position. The plastic cap or cup 52 is placed over the second end of the 
horizontal member 44. Height of the the hurdle 15 may be adjusted by 
manipulating the telescoping engagement between the lower and upper 
members 40,42. 
The invention has been described in an illustrative manner, and it is to be 
understood that the terminology which has been used is intended to be in 
the words of description rather than words of limitation. 
Obviously, many modifications and variations are possible in light of the 
above teachings. It is to be understood therefore that within the scope of 
the appended claims wherein reference numerals are merely for convenience 
and are not to be in any way limiting, the invention may be practiced 
otherwise than as specifically described.