A bearing structure includes a wheel assembly defining a first front wheel assembly and a second rear wheel assembly, the rear wheel assembly including at least two wheels spaced by a first width defining a first position; wheel supports connecting the axes of rotation of the wheels with the bearing structure; a first folding device enabling a first folding causing a reduction in spacing between the two rear wheels to a second width lower than the first width, defining a second position. A connection system, connecting the wheel supports of the first and second assemblies to the first folding device, enables a second folding of the wheels so as to allow a rotation substantially equal to 90 of the wheels in the horizontal plane when the wheels are in the second position.

A luggage transport system includes a first piece of luggage and a transport platform coupled to the first piece of luggage and adapted for supporting at least one additional piece of luggage when in a working position, wherein the transport platform has a first part and a second part pivotably connected to the first part, wherein the second part is substantially perpendicular to the first part when the transport platform is in the working position.

A folding cart for disc golf has frame elements allowing the cart to be folded with the elements in close, parallel planes, for storage or transport. In various models, the folding cart has a bag carrier implemented especially for a disc bag, the bag carrier foldable into a parallel plane, a seat also foldable into a parallel plane, a hand-operated brake, and an electric motor drive for driving one of the wheels of the cart.

A pallet sled includes a lower frame and a plurality of wheels supporting the lower frame. An upper frame is configured to support a pallet thereon. A ratchet is configured to lift the upper frame relative to the lower frame. A handle is configured to operate the ratchet to lift the upper frame relative to the lower frame. The handle may be pivotable relative to the lower frame. The ratchet may include a gear and a pawl. The ratchet may also be configured to selectively lower the upper frame. As another option, one or more of the handle, the upper frame or the plurality of wheels are reconfigurable between an extended position and a retracted position.

A method of assembling a wheeled package includes providing a package having an exterior surface with at least one cavity, and inserting a retractable caster assembly at least partially into the cavity. The retractable caster assembly includes a frame and a caster wheel assembly with a wheel and two guide members configured to be movable along slots within the frame so that: when the caster wheel assembly is at a first end of the slots the wheel is in a retracted position substantially within the cavity; and when the caster wheel assembly is at a second end of the slots the wheel is in an extended position extending from the cavity.

A convertible car seat, carrier and stroller device includes a car seat that has a frame, which is rigid. The car seat is shaped and sized to a child. A handle, which is extendable, is coupled to a back of the frame. A wheel assembly is coupled to and positioned in a housing that is coupled to a bottom of the frame. The wheel assembly is extensible from the housing and operationally coupled to the handle. Extending the handle lowers the wheel assembly and retracting the handle raises the wheel assembly. The car seat is couplable to a base that is configured to couple to an interior of a vehicle. The base is couplable to the interior of a vehicle and positioned to secure the car seat in the vehicle.

An integrated anti-tip mechanism is provided for aiding prevention of an electronics rack from tipping. The anti-tip mechanism comprises a long portion with a first end and a second end, the first end coupled to a base of the electronics rack and the second end coupled to a first end of a short portion. The first end of the short portion is coupled to the second end of the long portion and a second end of the short portion further coupled to a caster. When deployed, the caster rolls in a same direction as a set of casters beneath the electronics rack. The caster is a predetermined distance off the floor such that the weight of the electronics rack is carried by the set of casters beneath the electronics rack but contact the floor if the electronics rack tips thereby preventing the electronics rack from tipping past a predetermined angle.

A child carrier assembly is removably mountable to a bicycle and includes a seat, a backrest portion, a footrest portion, two side portions, child seating, support for a child while seated, and a docking assembly for connecting the child carrier assembly to the bicycle. The child carrier assembly functions as a convertible stroller by including a wheel assembly and a handle bar, where the docking assembly includes one part fixed to the bicycle and one part fixed to the child carrier assembly. The connection parts are releaseably mountable to one another, wherein the docking assembly includes a spring loaded mechanism that controls the releasable docking assembly by having one movable part and one fixed part. The docking assembly has a locking function so that an upper docking assembly unit fixed to the carrier assembly is dockable and undockable to a lower docking assembly unit fixed to the bicycle.

Movable containers for transporting materials using the motive power of a person are described. The containers include a recess at a bottom end thereof that may extend substantially along a width of the container. An elongated roller is partially located within the recess. The roller may extend substantially along the entirety of the recess and may have a variety of tread patterns. The container may further include more than one roller. More than one roller may be partially located within the recess of the container.

A method of assembling a wheeled package includes providing a package having an exterior surface with at least one cavity, and inserting a retractable caster assembly at least partially into the cavity. The retractable caster assembly includes a frame and a caster wheel assembly with a wheel and two guide members configured to be movable along slots within the frame so that: when the caster wheel assembly is at a first end of the slots the wheel is in a retracted position substantially within the cavity; and when the caster wheel assembly is at a second end of the slots the wheel is in an extended position extending from the cavity.