A rack includes: a casing; M pairs of supports that are provided inside the casing so as to extend in a depth direction and arrayed at regular intervals in a predetermined direction; and a lock mechanism. The rack can house all returnable containers of one or more prespecified sizes along the respective pairs of supports. The M pairs of supports are arrayed in N rows in an orthogonal direction orthogonal to the predetermined direction. The lock mechanism is configured such that moving first and second shafts that are provided for the respective rows and for the respective tiers, respectively, so as to be movable in the predetermined direction can switch between engagement and disengagement between branches of the first and second shafts and first and second holes, respectively, of the returnable containers.

A rack includes: a casing; M (an integer not less than three) pairs of supports that are provided inside the casing so as to extend in a depth direction and arrayed at regular intervals in a predetermined direction (a height direction or a left-right direction); and a lock mechanism. The rack can house all returnable containers of one or more prespecified sizes along the respective pairs of supports. The lock mechanism includes N (an integer not less than two and meeting N<M≤2.sup.N−1) shafts that are movable in the predetermined direction. Branches are provided on the shafts such that a combination of engagement and disengagement between the branches and holes provided in protrusions of the returnable container is different in each of the returnable containers housed on the respective M pairs of supports.

A garbage can hitch includes a base section, and a grab handle coupled to the base section. An attachment arm is coupled to the base section, and attaches to a garbage can. A receptacle is disposed within the base section, and configured to receive a hitch ball of a vehicle. A semi-cylindrical well is disposed within the base section, and configured to receive a handle bar of the garbage can. A garbage can includes a sidewall. The garbage can may include a built-in hitch attached to the sidewall. The built-in hitch includes a base section and a receptacle disposed within the base section. The receptacle receives a hitch ball of the vehicle. The gravity-enhanced configuration provides downward levered pressure on the hitch ball when the garbage can is towed, such that the hitch is kept securely linked to the hitch ball, even when the vehicle drives over bumpy or gravelly roads.

The electric stroller comprises a frame, a child seat, an operator seat, a plurality of wheels, a port motor, a starboard motor, a control circuit, and a battery. The electric stroller may be a self-propelled conveyance. The child seat may be supported by the frame and may be adapted to transport a child. The operator seat may be coupled to the frame behind the child seat and may be adapted to transport an operator. A port driven wheel may be propelled by the port motor and a starboard driven wheel may be propelled by the starboard motor with the speed and direction of the port motor and the starboard motor controlled independently.

The invention is directed to a detachable dolly training connector. The connector includes a first detachable connector for connecting to a first mobile platform or dolly, coupled to a second detachable connector for connecting to a second mobile platform or dolly. The first detachable connector can include an expandable and retractable pin arrangement. The second detachable connector can include a clamp.

A rack includes: a casing; M pairs of supports that are provided inside the casing so as to extend in a depth direction and arrayed at regular intervals in a predetermined direction; and a lock mechanism that locks returnable containers housed while being supported so as to be slidable along the respective M pairs of supports. The lock mechanism has M rotary lock main bodies that are respectively provided at the M pairs of supports and each unlock at a predetermined rotation angle, and a coupling member that couples the M rotary lock main bodies to one another and allows them to rotate in conjunction with one another. The predetermined rotation angle for unlocking is different for each of the M rotary lock main bodies, and the M rotary lock main bodies are driven to rotate by a single driving source.

A tow bar apparatus for a motorized utility cart is provided. The apparatus allows a utility cart user to tow a shopping cart. The tow bar is adapted to attach to any shopping cart by way of a universal attachment member. The opposing end of the apparatus includes a pair of spaced of laterally spaced attachment arms which are joined to a transverse attachment bar having clamps adapted for connection to the shopping cart. The universal attachment member is removably attached and may be modified to accommodate a specific make and model of scooter. The apparatus is reconfigurable depending upon the physical layout of the utility cart. An articulating arm is connected between the attachment member and the attachment arms to allow for an articulating attachment to the shopping cart.

A convertible, all-terrain gear cart convertible between modes of manual propulsion, trailering, and support by a motor vehicle. A control arm with a trailer hitch connector permits trailering or manual propulsion and is pivotally coupled to a first end of a cargo bin, and a vehicle engaging member to permit support and transport by a motor vehicle projects from the second end of the cargo bin. Detachable, all-terrain wheels with lateral axes of rotation are retained at a mid-portion of the cargo bin. Cargo retention and roll bars are removably coupled to the cargo bin, and a retractable support leg can cooperate with the wheels to stabilize the gear cart. The vehicle engaging member can comprise a receiver with a mitered end forming a shelf that can be rested on a rigid tongue of a trailer hitch adapter to permit levering of the gear cart relative to a vehicle.

An autonomous luggage cart system and method for transportation of objects in facilities such as hotels, condos, universities, and convention centers, providing a cart having a floor, a bumper, riser pipes, and an underside housing, wheels driven by electric motors, a high-capacity battery and a battery charge manager, front and rear tow hitches and tow-hitch sensors, corner sensors, a camera-sensor package, directional sensors, RFID units, a controller unit applying machine learning and artificial-intelligence methods to sensor data, and a communications unit and a remote unit for external communications with other systems.

A cart has a rectangular forward and rear frame structures both pivoted on a common axle carrying two wheels, lengthwise pieces joining side pieces of the frame structures on both sides, implementing triangular sides for the cart and forming an upper plane, other lengthwise pieces joining a cross pieces of the frame structures to form a support plane parallel to and lesser in width than the upper plane, a central two-inch square metal tubing joined below the forward frame structure from the axle structure to beyond an upper extent of the forward frame structure, a yoke assembly with a single front wheel; and a handle structure joined to the rear frame structure at an upper cross piece. The first and second lengthwise pieces serve as sides to restrain cargo loaded in the cart on the support plane formed by the third and fourth lengthwise pieces.