Disclosed are various embodiments for a multi-surface cart that can be modified or configured to move along different underlying surfaces. The cart can include a transport unit and an adjustable base unit that extends below a bottom surface of the transport unit. The adjustable base unit can be adjusted such that the cart is movable along a first surface in a first configuration with a plurality of wheels on the first surface and is moveable along a second surface in a second configuration with an underlying panel of the adjustable base unit on the second surface.

An inclination-adjustable cart includes a loading plate on which an object is loaded and a frame supported and fixed to one side of the loading plate, having a handle on the top side thereof to allow gripping by a hand. Wheels are installed at the front and rear of the lower part of the loading plate to guide the movement thereof. The wheels are divided into a front wheel part and a rear wheel part that may be simultaneously lifted/lowered using a wheel shaft or a support plate coupled to the bottom end of a lifting/lowering means. The top end part of the lifting/lowering means is coupled to the bottom surface of the loading plate. The lifting/lowering means is driven by a control part having a gyro sensor. Objects may thereby be stably or conveniently transported without being separated from the cart loading plate, i.e., a cargo box.

A multi-terrain cart, comprising a cart body, two front and two rear non-pivoting wheels, a swivel wheel positioned forwardly or rearwardly to the front and rear non-pivoting wheels, respectively, an actuator for applying a downward force to the swivel wheel which causes the swivel wheel to be set at an operative position and two of the non-pivoting wheels to be raised relative to an underlying ground surface, and means for setting an angle of the swivel wheel relative to a lengthwise extending centerline of the cart body to cause the cart to rotate about a center of rotation that is determined by the set angle of the swivel wheel.

A portable payload carrier (e.g., military transit case) comprises a housing for supporting at least one payload therein, and a ground transport assembly coupled to the housing comprising a first transport unit (e.g., cover) in support of a wheel assembly. The wheel assembly can comprise a wheel and at least one wheel support structure configured to support the wheel about the first transport unit. The wheel assembly can be operable between a stowed configuration and a deployed configuration for transporting the portable payload carrier about a ground surface via the wheel by a user. A handle transport assembly can be coupled to an opposing side of the housing, and can include a deployable handle assembly for lifting and moving the portable payload carrier. The wheel and handle assemblies can be collapsible to maintain a form factor of the portable payload carrier when in the stowed configuration.

A telescoping cart apparatus and method consists of a carrier configured to include receptacles for carrying cleaning materials. A carry handle is connected with the carrier where the carry handle is connected across the middle of the carrier. A divider is connected beneath the carry handle and is connected with the carrier such that the divider creates two separate sections of the carrier. Telescoping support legs are connected with the carrier where the telescoping support legs are adjustable from a retracted position within the carrier to an extended position outside of the carrier. An extendable adjustment handle is connected with the carrier. A button in the carry handle where the button is connected with the telescoping support legs for adjusting the positions of the telescoping support legs and wheels connected with the telescoping support legs.

A pull-behind carriage has an auxiliary wheel mounted on a reconfigurable drawbar. When the pull-behind carriage is converted to a push carriage, the drawbar is folded so that the auxiliary wheel is positioned on the ground to act as an extra, supporting wheel. Joints in the drawbar are palm operated and can be rotated without continuing to hold the joint. The drawbar may also serve to move the axle of the main wheels backwards when the carriage is converted from the pull-behind mode to the push mode.

A portable payload carrier (e.g., military transit case) comprises a housing for supporting at least one payload therein, and a ground transport assembly coupled to the housing comprising a first transport unit (e.g., cover) in support of a wheel assembly. The wheel assembly can comprise a wheel and at least one wheel support structure configured to support the wheel about the first transport unit. The wheel assembly can be operable between a stowed configuration and a deployed configuration for transporting the portable payload carrier about a ground surface via the wheel by a user. A handle transport assembly can be coupled to an opposing side of the housing, and can include a deployable handle assembly for lifting and moving the portable payload carrier. The wheel and handle assemblies can be collapsible to maintain a form factor of the portable payload carrier when in the stowed configuration.

A motor vehicle receiver hitch adapter with associated wheeled scissor lift cargo cart and mounted payloads. The hitch adapter comprises a variable pitch control system for mounting a cargo cart and attached payload in which the scissor lift mechanism within the cart is also capable of compressive force to power a dynamic pitch control system. The cargo cart also incorporates a restraint system to prevent carrying vehicle damage, and a vibration dampening system to protect carried payloads.

The stair-climbing stroller is a baby stroller with retractable front and rear wheels for use on flat travel surfaces and a pair of tracks for use on inclined travel surfaces including, but not limited to, staircases. The front wheels are coupled to a pivoting front wheel support shaft and the rear wheels are coupled to a pivoting rear wheel support shaft. A wheel retract motor located on the underside of the stroller may cause a retraction drive shaft to pivot the front and rear wheel support shafts, retracting the wheels. When the front and rear wheels retract, the stroller may be lowered such that the left and right track rest on the ground. Left and right track motors may then be used to drive the stroller up an inclined travel surface using the tracks.

A rolling car seat includes a car seat having back and seat portions configured to receive a seated child. A length-adjustable handle assembly is operatively coupled to the back portion and selectively movable between a retracted configuration not extending above a back portion upper end and an extended configuration extending above the back portion upper end. The rolling car seat includes a wheel assembly having a pair of spaced apart wheels operatively coupled to said the back portion and selectively movable between a withdrawn configuration adjacent said back portion rear surface and a deployed configuration displaced from the back portion rear surface.