A trailer includes a trailer frame using suspension cables supported from vertically extending towers on opposite sides of the trailer frame and connected to distal ends of the trailer frame for supporting distal portions of the trailer frame. The trailer bed frame comprises a plurality of folding frame sections which can be unfolded into planar alignment to form the trailer frame and folded into an overlapping or stacked alignment for storage. Left and right wheels are rotatably mounted on left and right suspensions which are removably securable to left and right sides of the trailer frame. The suspensions may comprise quarter elliptical leaf spring suspensions.

A holiday trailer may comprise a removable stand for rotating the trailer from a horizontal position to a vertical position for storing the trailer. The trailer may house a tent which is extendable in a longitudinal direction away from a body of the trailer. The trailer may comprise a work surface which is removably attached to the trailer.

A housing and trailer system comprising a trailer and a housing. The housing includes a lower housing and an upper housing and may be positioned on friction-reducing members that reduce friction between the housing and trailer. The reduction of friction facilitates the housing to slide more efficiently on the trailer. A safety lever and linkage system operates to safely move roof support structures and raise/lower the upper housing. An adjustable cargo system is attached to a roof on the housing. The adjustable cargo system is adjustable to receive and/or secure different sizes of cargo.

A load divider dolly has: a chassis; ground engaging wheels; a tow vehicle mount pivotally mounted to the chassis; a variable volume element mounted to adjust a pitch angle between the chassis and the tow vehicle mount; and a pressure control system configured to, during use, supply and exhaust fluid such as gas to and from the variable volume element to distribute load between a tow vehicle and the ground engaging wheels of the load divider dolly.

A trailed vehicle is provided comprising a plurality of operational components, at least one weight-sensing component, a body control module, a weight processing module, and an interface device comprising memory, a hardware processor coupled to the memory, a user interface, and a display. The user interface comprises user prompts for (i) associating particular operational components with the trailed vehicle and (ii) associating a particular weight-related parameter with the trailed vehicle. The weight processing module, the weight-sensing component, and the user interface are structured to generate an indication of vehicle weight at the user interface. The indication of vehicle weight is at least partially dependent upon the particular weight-related parameter associated with the trailed vehicle at the user interface. Additional embodiments are disclosed and claimed.

A housing and trailer system comprising a trailer and a housing. The housing includes a lower housing and an upper housing and may be positioned on friction-reducing members that reduce friction between the housing and trailer. The reduction of friction facilitates the housing to slide more efficiently on the trailer. A safety lever and linkage system operates to safely move roof support structures and raise/lower the upper housing. An adjustable cargo system is attached to a roof on the housing. The adjustable cargo system is adjustable to receive and/or secure different sizes of cargo.

A housing and trailer system comprising a trailer and a housing. The housing includes a lower housing and an upper housing and may be positioned on friction-reducing members that reduce friction between the housing and trailer. The reduction of friction facilitates the housing to slide more efficiently on the trailer. A safety lever and linkage system operates to safely move roof support structures and raise/lower the upper housing. An adjustable cargo system is attached to a roof on the housing. The adjustable cargo system is adjustable to receive and/or secure different sizes of cargo.

A retractable wheel assembly includes arm assemblies, wheels, retraction arms, guide blocks, and a threaded shaft. The arm assemblies are hingedly attached to a lower frame of a utility vehicle. Each arm assembly comprises a first arm, a second arm, and a third arm hingedly linked therebetween. Each wheel is connected to the third arm of each arm assembly. The retraction arm is connected to the second arm, and a threaded shaft. The threaded shaft is configured to be actuated rearwardly where the retraction arm is rearwardly pulled helped by a guide block to convert the longitudinal movement to vertical movement, causing the second arm to fold the arm assembly inwardly when the trailer is positioned at rest. Then the threaded shaft is configured to be actuated forwardly where the retraction arm is pushed forward and helped by a guide block to convert the longitudinal movement to vertical movement causing the second arm to unfold the arm assembly outwardly to deploy the wheels for motion.

A trailer includes a trailer frame using suspension cables supported from vertically extending towers on opposite sides of the trailer frame and connected to distal ends of the trailer frame for supporting distal portions of the trailer frame. The trailer bed frame comprises a plurality of folding frame sections which can be unfolded into planar alignment to form the trailer frame and folded into an overlapping or stacked alignment for storage. Left and right wheels are rotatably mounted on left and right suspensions which are removably securable to left and right sides of the trailer frame. The suspensions comprise quarter elliptical leaf spring suspensions formed from curved upper and lower leaf springs spaced apart by inner and outer spacers.

A trailer is disclosed which includes a first door with a first hinge configured to allow the first door to operate between an open position and a closed position, and a second door on the opposing side of the trailer with a second hinge configured to allow the second door to operate between an open position and a closed position. The trailer also includes a roof and a trailer tongue with a coupling configured to attach to a hitch of a vehicle. Two or more wheels are provided that are extendable from an up position to a down position. In this way, when the wheels are in the down position, the trailer is lifted off the ground. The trailer can thus change between at least three modes, including a first mode for storage, wherein the first door and second door are in the closed position and the wheels are in the up position; a second mode for ingress and egress, wherein at least one of the first door and second door are in the open position; and a third mode for travel, wherein the first door and second door are in the closed position and the wheels are in the down position.