Patent Publication Number: US-6910609-B2

Title: Equipment transportation system

Description:
RELATED APPLICATIONS 
   This application is a continuation-in-part of Ser. No. 09/336,887, filed on Jun. 18, 1999 now U.S. Pat. No. 6,213,539, which was a continuation-in-part of Ser. No. 09/100,808, filed on Jun. 19, 1998 which issued as U.S. Pat. No. 6,042,175. 

   FIELD OF THE INVENTION 
   This invention relates to the field of transporting equipment, and particularly, to systems for transporting sports equipment as well as other equipment. 
   BACKGROUND OF THE INVENTION 
   The use of sports equipment, as well as other recreational equipment is often hindered by the necessity of transporting the equipment to various locations. One example of this problem is the need to transport bicycles to a desired location, such as a vacation site, tour site, trail site, race, or other locations. Typically this requires either carrying the bicycle in a trunk, bed or backseat of the vehicle or else the use of a carrier of some sort, such as a car top carrier, trunk mounted carrier or receiver mounted carrier. 
   The use of the interior of the vehicle to transport the equipment creates a number of problems. For instance the lack of available space can be particularly a problem when there are several individuals with their associated equipment involved, especially if there is any significant distance to be traveled. Also, the view of the driver can be easily obstructed by the equipment. There is also a problem associated with damage to the equipment since the vehicle interior is seldom designed to accommodate such equipment. The security of the equipment is also an issue when the vehicle is left unattended, particularly overnight, since it is normally noticeable through the windows of the vehicle. 
   The use of exterior carriers also have significant problems. Exterior carriers tend to be either the modular component carriers which use racks on the vehicle top, rear or on the receiver, or else the “box-type” carriers which are essentially cargo boxes mounted on the rooftop. These carriers are cumbersome and create significant aerodynamic problems. The security of such devices are also questionable when the vehicle is left unattended. Also, the equipment is normally uncovered and susceptible to damage from the elements. Another problem with these carriers is the lack of accessibility to the equipment. 
   Prior trailers did not satisfactorily address these problems. The prior trailers were not designed specifically for these particular uses. The trailers tended to be boxy and relatively heavy. These trailers normally were accessible either by a rear or side door or else were open on top. Some trailers did have a removable top which tended to be cumbersome and difficult to use. The prior trailers were relatively expensive as well. 
   None of the prior carriers satisfactorily provided the ease of transporting equipment, the security and the convenience of storage of equipment that is desired. It is therefore desirable to provide such a device that will allow equipment, such as sports equipment as well as other recreational and work equipment, to be easily and securely transported and stored between locations. 
   SUMMARY OF THE INVENTION 
   The present invention accomplishes those needs by providing a system of carriers for transporting equipment between locations. The carriers of the present invention proves a secure and efficient device for transporting such equipment in a secure manner. The carriers of the present invention are relatively inexpensive and is formed of lightweight, high-strength materials. The carriers of the present invention are able to be towed or mounted behind most vehicles with little loss in speed or maneuverability. The present invention is aerodynamically shaped, yet is able to securely hold a large amount of equipment, such as bicycles. 
   The present invention does this by providing carriers having a body which is fully enclosable, yet having lid members which easily open to allow full access to the body. The compartment body is formed of a high-strength, light weight plastic material. The lower compartment body has a substantially oval shape with features pre-molded therein. For instance, the trailer hitch tongue, in one preferred embodiment, is bolted directly onto the lower compartment body. The axle assembly is also bolted directly onto the compartment body. This eliminates the need for a trailer frame and the associated weight and expense. In a preferred embodiment, an internal frame is mounted to the trailer chassis, eliminating an external trailer frame. In other embodiments, a lightweight trailer frame is used. 
   A first lid member is pivotally mounted on the front end of the lower compartment body with a mating second lid member pivotally mounted on the rear end of the lower compartment body. The two lid members pivot upward and away from one another to allow full access to the lower compartment body. The two lid members then pivot downward and toward one another with a slight overlap when fully closed. This fully encloses the lower compartment body as well as providing a substantial amount of additional storage as well. 
   In a preferred embodiment, the lids are pivotally mounted to the compartment body by a sliding hinge mechanism. This allows the lids to drop down over the ends of the compartment to reduce the height of the opened compartment lids, and to provide greater access into the compartment. 
   The two lid members include overlapping edges on their ends as well as their sides to seal the compartment from the outside elements as well as from unauthorized access. The two lid members can also be locked to prevent unauthorized access. The interior of the compartment body includes hardware for securing the equipment in place. For instance, bike mounting devices can be installed or even formed inside the floor of the lower compartment body. Also, cargo bins can be affixed or formed in the lower compartment body as well in the interior of the two lid members. Hooks and other devices can be installed or formed to attach other devices, such as cargo nets, and straps. 
   In a preferred embodiment of the present invention, an internal frame formed of a slotted channel conduit is mounted to the floor of the compartment body. This novel use of the slotted channel conduit provides two important functions. First, the internal frame is mounted through the floor of the compartment directly to the chassis to provide support to the carrier structure. Secondly, equipment mounting hardware can be mounted to the slotted channel conduit to be easily adjusted and interchanged as desired. No other carrier system has this capability. 
   In another embodiment of the present invention, the carrier system itself is formed from the slotted channel conduit. A frame is formed from this material in a shape that can be directly attached to a roof rack, pick-up bed, or other vehicular surface. 
   Other variations of the trailer can be used as well to transport other types of equipment, such as skis, luggage, kayaks as well as work equipment and tools. In other embodiments include one wheeled trailers, multiple axle trailers, or even trailers not supported by wheels but cantilevered off the rear of the vehicle. Other shapes and configurations of trailers include streamlined trailers having wind-spoilers, wind deflectors, or unique shapes which identify manufacturers, sports teams, sponsors for race teams, and other fanciful shapes. 
   One preferred embodiment of the present invention utilizes a pliable cover in place of the two lid members. The pliable cover is supported by two support rods over the opening of the compartment. A strap is used to tension the cover and to secure the cover on the compartment. A zipper or other fastening device on a side of the cover is used to allow easy access into the compartment. 
   Another preferred embodiment of the present invention utilizes an external frame over the compartment to provide additional securing of equipment, particularly oversize equipment such as kayaks, canoes and the like. The external frame, in a preferred embodiment, is formed from slotted channel conduit members bent to form the exterior frame. The frame is mounted to the chassis of the carrier, preferably at the mounting points of the internal frame. Equipment mounting hardware is attached to the slotted channel conduit frame. 
   Another preferred embodiment of the present invention is to mount the carrier compartment onto a platform. The platform includes a member which engages in the hitch receiver of a vehicle to attach the compartment onto the vehicle. The tubular member includes a telescoping section to allow the compartment to be moved rearwardly to allow access into the vehicle without removing the compartment from the vehicle. Wheeled stands are pivotally attached to the bottom of the platform to be moved into position to support the carrier when the carrier is removed from the vehicle. 
   In yet another embodiment of the present invention, a spine member is engaged in the hitch receiver of a vehicle. The spine member includes a single tubular member onto which accessories can be mounted. For example, a platform can be attached to the spine member for carrying cargo. Also, equipment mounting apparatus, such as bicycle mounts, golf bag mounts and other types of mounts can be attached to the spine member. Thus, a single spine member can be used with various attachments to be configured to carry almost any cargo or equipment. 
   Other embodiments also include a spine member having a flexible cover attachable to cover the equipment. Also, the spine member can also be attached to hard points on the bumper or frame of the vehicle to provide additional support. 
   These and other features of the present invention are evident from the drawings along with the detailed description of preferred embodiments. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
       FIG. 1  is a perspective view of a preferred embodiment of a trailer of the present invention; 
       FIG. 2  is a side view of the trailer of the embodiment of  FIG. 1 ; 
       FIG. 3  is a rear view of the trailer of the embodiment of  FIG. 1 ; 
       FIG. 4  is a side view of the trailer of the embodiment of  FIG. 1  with the lid members in an open position; 
       FIG. 5  is a top view of the trailer of  FIG. 4  viewing the interior of the trailer; 
       FIG. 6  is a side view of an alternative embodiment of a trailer of the present invention; 
       FIG. 7  is a top view of the trailer of  FIG. 6 ; 
       FIG. 8  is a rear view of the trailer of  FIG. 6 ; 
       FIG. 9  is a perspective view of a third embodiment of the present invention; 
       FIG. 10  is a cutaway view of the embodiment of  FIG. 9 ; 
       FIG. 11  is a side view of the embodiment of  FIG. 9 ; 
       FIG. 12  is a top view of a fourth embodiment of the present invention; 
       FIG. 13  is a view of the internal frame of the embodiment of  FIG. 12 ; 
       FIG. 14  is a cross-section view of the internal frame of  FIG. 13 ; 
       FIG. 15  is a view of roof-top carrier version of carrier; 
       FIG. 16  is a perspective view of fifth embodiment of the present invention; 
       FIG. 17  is a perspective view of a sixth embodiment of the present invention; 
       FIG. 18  is a perspective view of a seventh embodiment of the present invention; 
       FIG. 19  is perspective view of an additional embodiment. 
       FIG. 20  is a rear view of the embodiment of  FIG. 19 ; 
       FIG. 21  is a view of the embodiment of  FIG. 19  in an open position; and 
       FIG. 22  is a side view of the embodiment of FIG.  19 . 
       FIG. 23  is a perspective view of another embodiment of the present invention; 
       FIG. 24  is a rear view of the embodiment of the present invention; 
       FIG. 25  is a side view of the spine member embodiment of the present invention; 
       FIG. 26  is a side view of the spine member embodiment of  FIG. 25  with bicycle mounts attached; 
       FIG. 27  is a rear view of the spine member embodiment of  FIG. 26  with a bicycle attached; 
       FIG. 28  is a top view of the spine member of  FIG. 26  with bicycles and cargo platforms attached; 
       FIG. 29  is a perspective view of the spine member embodiment of FIG.  28 . 
   

   DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT 
   Referring in more detail to the drawings, as shown in  FIGS. 1-6 , a preferred embodiment of the present invention is described. It is to be expressly understood that this exemplary embodiment is provided for descriptive purposes only and is not meant to unduly limit the scope of the present inventive concept. Other embodiments, and variations of the carriers of the present invention are considered within the present inventive concept as set forth of the claims herein. For explanatory purposes only, the carriers of the preferred embodiments are discussed primarily for use with bicycles. It is to be expressly understood that other types of equipment are contemplated for use with the present invention as well. 
   First Embodiment 
   Trailer  10 , as shown in  FIG. 1 , is a preferred embodiment of the present invention. Trailer  10  includes an compartment  50  and an axle assembly  20  having wheels  22 ,  24  as shown in  FIGS. 2 and 3 . The axle assembly  20  is bolted directly onto the bottom of compartment  50 , as discussed in further detail below. A tongue  26  extends outwardly from the front of the compartment  50 , as shown in FIG.  1 . The tongue  26 , in the preferred embodiment, is bolted directly onto the bottom of the compartment  50  as discussed in greater detail below. A conventional hitch (not shown) is affixed to the front end  28  of the tongue to allow the trailer  10  to be pulled behind a vehicle. In other embodiments, the axle assembly, tongue and trailer hitch assembly are formed as a trailer frame upon which the compartment is mounted. 
   The compartment  50  is formed from a high-strength, durable plastic material to create a lightweight durable trailer. In the preferred embodiment, the compartment  50  is substantially oval or rounded in shape to increase the aerodynamic qualities and to decrease manufacturing expense. It is to be expressly understood that other shapes and configurations can be utilized under the present invention as well. The compartment  50  includes a lower compartment body  60 . The bottom  52  of the compartment  50  includes slots and recesses for the tongue  26  and the axle assembly  20  to be bolted directly onto the compartment  50 . Wheel wells  54 ,  56  are recessed into the side portions  62 ,  64  of the lower compartment body  60 . Taillight recesses  70 ,  72 , as shown in  FIG. 3 , are also directly formed in the rear surface  68  of the lower compartment body  60 . Taillights, not shown, are then mounted within these recesses. A license plate recess  74  is also formed in the center of the rear surface  68  of the lower compartment body  60 . 
   A first lid member  80  is pivotally attached to the lower compartment body  60  by a living hinge  82 , or by a separate hinge, extending along the front of the lower compartment body  60 . A second lid member  100  also is pivotally attached to the lower compartment body  60  by a living hinge  102  or by a separate hinge, extending along the rear of the lower compartment body. The first lid member  80  and the second lid member  100 , when in their lowered closed position as shown in  FIGS. 1-3 , form a “shell” over the lower compartment body  60  to fully enclose the compartment  50 . 
   The first lid member  80  includes a recessed end portion  84  extending about the perimeter of the rear portion  86  of the first lid member  80 . The recessed end portion  84  terminates in an upturned lip  88 . The second lid member  100  includes a recessed end portion  104  extending about it&#39;s rear portion  106 . The recessed end portion  106  terminates in a flat lip  108 . In the closed position, the recessed end portion  84  of the first lid member overlaps the recessed end portion  104  of the second lid member. This forms an effective seal as well as adding reinforcement to the compartment  50 . 
   The first lid member  80  also includes an outwardly extending lip portion  90  extending around the perimeter of the bottom portion  92 . This lip portion  90  terminates in a downwardly extending lip  94 . The second lid member  100  has a similar outwardly extending lip portion  110  which terminates in a downwardly extending lip  114 . These lip portions  90  and  110  form a seal over the joint between the lower compartment body  60  and the first lid member  80  and the second lid member  100  when the lid members are in the closed position. This prevents rain, snow, and other debris from entering into the compartment as well as preventing unauthorized access into the compartment. 
   One or more slots (not shown) are formed in the first lid member  80  in the recessed end portion  84  and/or in the outwardly extending lip portion  90 . These slot(s) engage over a clasp or other locking device affixed to the recessed end portion  104  and/or in the outwardly extending lip portion  110  of the second lid member to enable the lid members to be locked together and/or onto the lower compartment body  60  to prevent unauthorized access. 
   The first lid member  80  and the second lid member  100  are pivotable upward, as shown in  FIG. 4 , about their respective hinges to allow access into the compartment  50 . This opening within the center of the compartment  50  allows quick and ready access to all parts of the interior of the compartment  50  so that unloading of all the equipment contained therein is not necessary to gain access to equipment stored away from an opening as was the case in prior trailers. 
   Retaining cables  120 ,  122 , or other retaining devices are used to prevent the lid members from pivoting beyond the opened position which might damage the trailer and also to enable the lid members to be easily closed without undue lifting. Also, finger holes or handles can be formed or attached to the lid members to assist in opening and closing the lid members. 
   Securing devices, such as bicycle skewer mounts, trays, clasps and other such devices can be hard mounted within the interior of the compartment  50 , as shown in  FIG. 5 , to secure bicycles, or other equipment within the trailer. Also, equipment boxes, tool boxes, cargo bins, can be easily mounted or secured within the compartment as well. In one preferred embodiment of the present invention, cargo net hooks are attached to allow equipment to be safely secured within the trailer. 
   In use, bicycles or other equipment is stowed and secured in the lower compartment body  60  with the first lid member  80  and second lid member  100  in their up and open position. Once the equipment has been secured. The second lid member is lowered to its closed position and then the first lid member is lowered so that the recessed end portion  84  overlaps the recessed end portion  104  of the second lid member. The lid members can be then be locked to prevent unauthorized access. The lid members can then be unlocked and raised to allow access to the equipment as necessary. 
   When the trailer is not in use for transporting equipment, it can be easily broken down. The tongue can be unbolted, or else the hitch assembly can be released by a quick-release mechanism. The axle assembly can be unbolted, but typically would be left in place. The lightweight of the compartment and of the entire trailer allows it to be suspended out of the way for storage if desired. 
   The aerodynamic shape, and high-strength, lightweight structure of the trailer enables it to be easily towed behind most vehicles. However, other shapes are certainly within the scope of the present invention. For example, a lowered, wind-foil or raised wind-spoiler front lid member could be used. Also, the shape of the compartment can be configured about the shape of the equipment to be transported, such as kayaks, skis, recumbent bicycles, and almost any other type of equipment. Additionally, the equipment need not be limited to sports or recreational equipment. The shape of the compartment can be configured for utilitarian purposes, such as work-sites, or about work equipment or boxes. 
   The sides of the compartment are particularly adaptable for the placement of decals and logos. Also, the shape of the compartment can be formed to identify product manufacturers, team sponsors, or other fanciful shapes, beyond the utilitarian shape for the equipment. 
   Second Embodiment 
   An alternative embodiment of the trailer of the present invention is shown in  FIGS. 6-8 . The trailer  600  includes a frame  610  having wheels  612 ,  614  mounted on an axle assembly secured to the frame. A tongue  616  extends outward from the frame  610 . An compartment body  620  is mounted onto the frame  610  by well-known fasteners. The compartment body  620  extends forward on the frame  610  beyond the mid-center of the compartment body  620 . This provides more weight on the tongue and vehicle to allow greater stability under heavier loads. The front lid member  630  and the rear lid member  640  are asymmetrical. The rear lid member  640  is longer with a lower profile than the front lid member  630 . This provides a more streamlined appearance as well as adding additional capacity. Reinforcement ribs  632 ,  642  also add strength to the lid members. This embodiment has an increased payload compared to the above embodiment. 
   Third Embodiment 
   Another embodiment of the present invention is illustrated in  FIGS. 9-11 . Trailer  900  is similar to the above-described embodiment  100 . Compartment  910 , formed of a high strength durable plastic material. First member  920  and second member  950  are similar to the first member  80  and second member  100 , described above. However, first member  920  and second member  950  are mounted in a different fashion than the first embodiment described above. 
   First member  920  is attached to compartment  900  by a slide and swing mechanism  930 , shown in FIG.  10 . Slide rod  932  is mounted to the lower interior of first member  920  by brackets  934 ,  936 . Swing rod  940  is mounted on first end  942  to the upper interior of compartment  900 . Slide bracket  946  is mounted on the second end  942  of swing rod  940 . The slide bracket  946  is mounted on slide rod  932  for sliding movement. The end of first member  920  is able to slide over the end of compartment  900  and drop down, as shown in FIG.  11 . 
   Second member  950  is attached to compartment  900  in a similar fashion, using a slide and swing mechanism. As shown in  FIG. 11 , first and second members are able to drop down over the ends of the compartment  900 . This provides several benefits. First, the members are more stable with less stress on the members and the compartment than the hinges of the first embodiment. Second, the members are not as susceptible to wind gusts. Third, the members are not as likely to drop down during the loading or unloading process. Fourth, the opening is actually larger, since the members slide away from the center of the compartment. In an alternative embodiment, the slide and swing mechanism utilizes two swing rods to provide additional stability. 
   This embodiment, as shown in  FIG. 11 , includes slide rods  960 ,  962 ,  964 ,  966  to stabilize the members  920 ,  950  as the members are opened upward. Slide brackets  968 ,  970 ,  972 ,  974  are mounted to the interior of the compartment  900  for the slide rods to move through. 
   The slide brackets  968 - 974  and the slide and swing mechanisms are designed to allow the slide rods and swing rods to easily disengaged. This is done by using spring clips, set screws or other attachment devices. Thus, the trailer can be easily assembled for use and disassembled when not in use. 
   Fourth Embodiment 
   The present invention also provides a unique feature which simultaneously forms the infrastructure of the trailer and provides adjustable hard point mounting for the equipment in the trailer. Trailer  1200 , shown in  FIG. 12 , includes internal frame  1220  mounted on the floor of the compartment  1210 . Internal frame  1220  is directly mounted to the chassis  1230  of the trailer  1200  through the floor of the compartment. In this embodiment, the chassis  1230  of the trailer consists of tongue  1232 , axle  1234  and torflex suspension  1236 . The chassis does not include a frame in this embodiment. The internal frame  1220  provides the frame for the trailer. 
   The internal frame  1220 , in one embodiment, includes several points for attaching hardware for securing equipment in the trailer. For example, well-known bicycle securing hardware could be attached for securing bicycle frames within the trailer. Other hardware could be used as well, such as loops or hooks for bungee cords or cargo networks. 
   In a preferred embodiment, the internal frame  1220  is formed from open-slotted channel conduit, such as the slotted conduit provided by Unistrut Corporation. This slotted conduit is used for industrial and commercial applications to provide construction framework as well as electrical cable routing. The present invention provides a unique application for this material. As shown in  FIG. 13 , the internal frame  1220  utilizes this slotted channel conduit bent into a substantially oval shape and mounted on the floor of the compartment directly to the trailer chassis. Bicycle mounting hardware  1250  is adjustably mounted to the internal frame by spring nuts  1252 , shown in FIG.  14 . The spring nuts  1252  are able to slide within the channel  1254  of the internal frame  1220  to the desired spot in the compartment. Thus, the equipment mounting hardware can be quickly interchanged and moved as desired. 
   The present invention also includes other embodiments for equipment transportation utilizing the slotted framing conduit. For instance, the slotted framing conduit may be utilized on a roof-top carrier, as shown in  FIG. 15 , in lieu of the bars currently widely in use. Appropriate equipment mounting hardware can be easily and adjustable mounted to the slotted framing conduit by spring nuts in place of the C-clamps and blots current used. 
   Fifth Embodiment 
   An alternative embodiment of the present invention is illustrated in FIG.  16 . Trailer  1600  includes trailer chassis  1610  and compartment  1620 , similar to the trailer chassis and compartments described above. Soft top  1630  is utilized instead of the members of the above-described embodiments. Soft top  1630  is formed of a durable material such as canvas, nylon or other flexible cover material. The soft top  1630  is supported on the compartment by internal frame  1640 . Internal frame  1640  includes aluminum rod  1642  and aluminum rod  1644  extending through pockets  1646 ,  1648 , respectively, formed on soft top  1630 . The ends of aluminum rods  1642 ,  1644  fit into pockets  1650 , 1652 , 1654 ,  1656  in the edges of the soft top  1630 . 
   Strap  1660  is mounted within pocket  1662  on the perimeter of the soft top. Strap  1660  is preferably formed of a durable elastic material. Tensioning device  1664  secures the ends of strap  1660 . Soft top  1630  is placed on the compartment  1620  so that strap  1660  extends beneath the upper rim of the compartment. The strap is tightened by the tensioning device  1664  until the soft top  1630  is taut over the compartment. Other tensioning devices can be used, such as snaps, as well. The support rods  1642 ,  1644  provide support for the soft top as well keeping the soft top raised from accumulating water, snow or other debris. 
   Zipper  1670  is provided to allow easy access to the interior of the trailer without removing the soft top. If necessary, the tension in the soft top can be lessened to allow ease of use of the zipper. 
   Sixth Embodiment 
   Another embodiment of the present invention is illustrated in FIG.  17 . External frame  1710  is mounted to trailer  1700 . External frame  1710  includes front frame section  1720 , rear frame section  1730 , cross frame members  1732 ,  1734  extending between the front frame section  1720  and rear frame section  1730 , and support members  1736 ,  1738  securing front frame section  1720  to the tongue of the trailer. 
   In the preferred embodiment, the front frame member  1720  attaches to the trailer at the mounting points of the internal frame member  1220  discussed above, and the trailer chassis. The rear frame section  1730  also attaches directly to the trailer at the rear mounting points of the internal frame member  1220  and the trailer chassis. 
   Equipment mounting hardware can be mounted on the front frame member  1720 , the rear frame member  1730  and/or the cross frame members  1732 ,  1734 . Thus, additional equipment, such as kayaks, canoes, hang gliders, or other equipment which may be unable to fit within the trailer can be transported. 
   In a preferred embodiment, the frame members are formed from the slotted framing conduit discussed above, such as the conduit manufactured by the Unistrut Corporation. The equipment mounting hardware can be easily mounted onto the frame members by spring nuts. The hardware can be easily adjusted or interchanged as well. 
   Seventh Embodiment 
   Another embodiment of the present invention is illustrated in  FIGS. 18-21 . The equipment transportation system of this embodiment mounts directly onto the trailer hitch receiver of a vehicle. Compartment  1800  includes a lower compartment  1810  mounted on tubular member  1820 . Support brackets  1822 ,  1824  provides support for the base of lower compartment  1810  on tubular member  1820 . Platform  1826  may also be used to support lower compartment  1810  as well. Recessed taillights  1830 ,  1832  are mounted on the exterior of lower compartment  1810 . 
   Compartment  1800  also includes first member  1840  and second member  1850 . First member  1840  and second member  1850  are mounted to compartment by slide and swing mechanisms, such as the slide and swing mechanism  930  discussed above. This allows the members to slide over the lower compartment  1810  and drop down to be out of the way, as shown in FIG.  20 . The members include a recess lip to allow the members to overlap for sealing purposes. A locking latch member  1860  is also used to securely lock the members. 
   Compartment  1800  is mounted to the vehicle by sliding tubular member  1820  into the hitch receiver of the vehicle. A pin is then inserted through the hitch receiver and the tubular member  1820  to secure the compartment to the vehicle. 
   In the preferred embodiment, the tubular member  1820  includes a telescoping section  1870  which is normally inserted over tubular member  1820 . If access is desired into the rear of the vehicle, pin  1874  is removed and tubular member  1820  is slid rearward relative to telescoping section  1870  a sufficient distance to allow the rear tailgate to be lowered. Once the tailgate is closed, the compartment  1800  is slid towards the vehicle until the pin  1874  can be reinserted. 
   Another feature of the preferred embodiment are flip down legs  1880 ,  1882  mounted on lower side of the base of the compartment. Wheels  1884 ,  1886  are attached to bottom of legs  1880 ,  1882 . Pins  1888 ,  1890  hold the flip down legs against the base of the compartment. The pins are removed to release the legs when the compartment is to be removed from the vehicle. Once the legs are fully lowered and the wheels engage the ground, the legs are locked in place. The pin is removed from the hitch receiver and the compartment can simply be rolled away from the vehicle. 
   Cargo Platform Embodiment 
     FIGS. 23 and 24  illustrate an additional embodiment of the present invention. Platform  2310  is mounted to member  2300  which is sliding engaged and pinned in the hitch receiver of the vehicle, as discussed above. In a preferred embodiment, the platform  2310  is formed of compression molded plastic. Also, in another preferred embodiment, a rugged, lightweight cargo box is secured to the platform as well to provide secure storage. Additionally, the platform  2310  can mount to hard points on the vehicle bumper or the vehicle frame for additional support. 
   A flexible cover (not shown) supported by flexible poles, similar to the cover  1630  and poles  1640 , can be used as well to cover equipment and cargo secured to the platform  2310 . 
   Spine Member Embodiment 
   In the embodiment shown in  FIGS. 25-29 , spine member  2500  is sliding engaged and pinned in the hitch receiver of a vehicle. Spine member  2500  extends out away from the vehicle. Various equipment mounting hardware, such as bicycle mounting hardware as described above in  FIGS. 14 and 15 , can be mounted to the spine member. For example, as shown in  FIGS. 26-29 , “C” channels  2520  are mounted transversely on spine member. Bicycle mounting hardware  1250  is mounted on the “C” channel to allow bicycles to be mounted to the spine member, as shown in FIG.  27 . Also, a cargo platform  2510  can also be mounted on the spine member. 
   In another variation on this embodiment, additional members are attached to spine member and parallel to the spine member. These additional members are attached to hard points on the vehicle bumper or frame. 
   Other Embodiments 
   The present invention also includes embodiments having only wheel, or with multiple axles to allow four or more wheels, depending on the use of the trailer. Also, in another embodiment, the trailer is directly mounted to the bumper of the vehicle. In another embodiment, the trailer is fully supported by the bumper of the vehicle and does not use wheels. In yet another embodiment, one or more accesses can be formed in the front, rear, sides or in the lid members of the compartment to allow easy access to equipment or tools stored within the compartment. 
   Other embodiments contemplated under the present invention includes mounting a compartment on skis, runners, skids, pontoons, foils or other apparatus for use on snow or water. 
   The present inventive concept, as set forth in the accompanying claims, covers not only the described embodiments but other embodiments, variations and configurations of the trailer as stated in the accompanying claims.