A suspension system is provided comprising at least one ride height valve, when engaged, that allows an air flow to engage a hydraulic control valve such that it initiates either extension or retraction of a hydraulic piston from a cylinder. Extension or retraction of the hydraulic piston causes a booster frame to be bias downwardly or upwardly, respectively. The ride height valve is engaged when a booster axle is at a predetermined distance from the frame.

A powered trailer unit that includes a support frame, and a bed disposed on the support frame. The frame has a first side, a second side opposite the first side, a proximate end and a distal end. The first side has a first guide rail, with the movable wall movingly engaged therewith. There is a mover operatively engaged with the movable wall, the movable wall configured to be moved back and forth along the unit by operation of the mover.

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.

A trailer includes a set of removable castor wheels attached to a rear portion thereof, wherein the castor wheels are oriented to face rearwardly when the trailer is oriented in the traditional horizontal position. This arrangement allows the trailer to be tilted upwardly into a vertical orientation so that it rests on the castor wheels, thus providing an apparatus and method for easily moving and storing trailers more efficiently due to the reduced footprint required for such trailer storage. The castor wheels, in one embodiment, include mounting brackets that may be attached to the trailer using a securing rod, similarly to the mounting mechanisms commonly used for removably attaching trailer hitches into trailer hitch sleeves, thus rendering the castor wheels removable from the trailer when they are not in use for storage purposes.

This utility model integrates into the standard structure of a teardrop mini camper, a folding front door that generates a bathroom module. Usually in these vehicles, a rear door is used for the kitchen space, so the mini camper described herein incorporates a door of similar characteristics in its front part, where the drawbar is placed.

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 trailer system and method of using the same are described herein where the trailer system allows for storage in a compact space and reduction of weight of the trailer system. The trailer system in some embodiments may have a center rail with a hinge so that the trailer can fold in half and be positioned against a vertical wall for storage. The trailer system can also have a sliding basket system for receiving the wheels of a vehicle to allow for the storage of the trailer system in a compact space, to allow the trailer system to receive vehicles with different wheelbases, and to reduce the weight of the trailer system.

A cart assembly adapted for manual, bicycle and/or motorized vehicle towing. Multiple frame sections are coupled to pivot between completely collapsed, partially open and completely open positions to facilitate, travel, storage and sleeping. A pair of axle plates support primary wheels to the framework and a drive axle between adjacent cross-brace arms. A handle frame section, saddle arms, truss arms, resilient spreader arms, auxiliary caster wheel, battery powered electric drive motor(s), fabric cover and/or hard cover mount to the framework. A resilient, reciprocating shock absorbing tow bar or tongue arm assembly provides flexibly resilient pieces to absorb travel shock between the cart and tow vehicle.

A portable towing system for a motorcycle or similar vehicle, such as a trike, the frame of which can be lowered to ground level to facilitate loading of the motorcycle or similar vehicle by pushing or riding the vehicle onto the frame without risk of the vehicle falling off the sides of a steeply inclined ramp. The towing system may be assembled, raised, lowered, and disassembled by a single person, if desired. The raising and lowering of the frame is effected by a lifting and lowering mechanism connected with the wheel assemblies.

The present invention contemplates an apparatus for, and methods of, conveniently transporting cargo by holding cargo securely in a way using a transport apparatus that can be coupled to a vehicle, for easy and convenient transport of the cargo. The invention contemplates a transport apparatus that is capable of horizontal, vertical, telescoping, and/or rotational collapse and/or expansion. The invention contemplates wheels on a collapsed transport apparatus that make moving from place to place very convenient, whether the transport apparatus is expanded or collapsed. Embodiments can be used to secure and transport cargo such as bicycles. Embodiments of the invention allow coupling of a transport apparatus to a vehicle by use of a standard ball joint and/or trailer hitch. Other embodiments could comprise a trailer connection attachment, which can be used to couple a transport apparatus to a vehicle in cases where the vehicle lacks its own trailer hitch.