An interlocking primary and secondary cart assembly may include a primary cart assembly including a primary support platform configured to support a primary working device and wheels operatively connected to the primary support platform that movably support the primary support platform spaced from a floor and a secondary cart assembly including a secondary support platform configured to support a secondary working device and wheel connected to the secondary platform that moveably support the secondary support platform spaced from the floor. The assembly may further include a lock and release mechanism including a primary lock and release component connected to the primary cart assembly and a secondary lock and release component connected to the secondary cart assembly wherein the secondary lock and release component aligns with the primary lock and release component for locking therewith with the secondary cart assembly positioned on the primary support platform of the primary cart assembly.

An interlocking primary and secondary cart assembly may include a primary cart assembly including a primary support platform configured to support a primary working device and wheels operatively connected to the primary support platform that movably support the primary support platform spaced from a floor and a secondary cart assembly including a secondary support platform configured to support a secondary working device and wheel connected to the secondary platform that moveably support the secondary support platform spaced from the floor. The assembly may further include a lock and release mechanism including a primary lock and release component connected to the primary cart assembly and a secondary lock and release component connected to the secondary cart assembly wherein the secondary lock and release component aligns with the primary lock and release component for locking therewith with the secondary cart assembly positioned on the primary support platform of the primary cart assembly.

A mother daughter cart system includes a transportable daughter cart, a moveable mother cart to which the daughter cart is selectively addable and an onboard energy generation system. With the addition of the daughter cart to the mother cart, the mother cart is coupled with the daughter cart for movement as a unit. The daughter cart includes a part support adapted to carry one or more parts, and an electrically powered actuator coupled to the part support and configured, when powered, to selectively impart movement to the part support to manipulate its position. The energy generation system includes a generator configured to convert energy from the mother cart's movement into electrical energy usable to power the actuator in the daughter cart.

Systems and methods are provided for a swing arm dolly. A swing arm dolly can comprise a swing arm mounted on a frame. A lever and locking mechanism can lock the swing arm to the frame. One or more wheels can extend downward from the swing arm. The swing arm dolly can also comprise a spring-loaded plunger secured to the frame, wherein upon disengaging the locking mechanism, the one or more wheels roll onto the spring-loaded plunger, pushing the spring-loaded plunger downward to lock the swing arm dolly.

A vehicle-mounted bike carrier specifically designed for electric bicycles, featuring a hydraulic lifting mechanism for easy loading and unloading, a sliding hitch for convenient access to the vehicle's tailgate or trunk, foldable cradles for the wheels, and a compact design for easy storage. The carrier allows users, especially those with limited physical strength, to transport heavy e-bikes safely and efficiently.

A cart enabling a single person to pull a livestock chute across the ground. The cart includes a bar having a handle and wheels provided at opposing ends. The bar includes first and second members pivotally engaged together. A crossbar pivotally mounted on the bar includes first and second arms configured to engage handles on a lower front end of the chute. When the bar is in a collapsed position, where the first and second members are disposed at an angle to each other, the first and second arms are insertable into the chute handles. When the bar is moved to an erected position, where the first and second members are aligned along the same plane, a force is applied to a footrest on the bar. The arms lift the front end of the chute off the ground and the cart's wheels move under the front end of the chute.

A carrier device includes a coupling mechanism for connecting an automatic controlled vehicle to a carriage. The coupling mechanism includes a first roller assembly and a second roller assembly. The first roller assembly includes a first roller and a third roller, provided on a first common shaft. The second roller assembly includes a second roller and a fourth roller, provided on a second common shaft. The first roller and the second roller can enter a gap of the guide rail section in the automatic controlled vehicle. When the lock member moves from the first position to the second position, the lock member is sandwiched between the third roller and the fourth roller.

A loading frame includes a rectangular u-shaped frame with an opening at one side, forks extendable and retractable between the closed side and the open side of the U-shaped frame, loading frame wheels on one arm of the U-shaped frame, and a truck interface on the other arm of the U-shaped frame. The loading frame wheels and truck interface support travel of the frame in a direction other than the direction of travel of the forks between the open and closed sides of the U-shaped frame.

A low-profile motorcycle dolly comprises a pair of parallel rods and at least one motorcycle wheel support assembly. The motorcycle wheel support assembly comprises a pair of caster subassemblies and a motorcycle wheel plate. Each caster subassembly attaches to one of the rods respectively. Each caster subassembly comprises a caster bracket. The caster bracket attaches to the respective rod and is provided with a pedal assembly. The motorcycle wheel plate is connected between the caster brackets of the pair of caster subassemblies. The pedal assembly comprises a pedal and a pedal shaft. Each caster subassembly further comprises a caster mounting plate pivotably mounted onto the caster bracket. The caster mounting plate comprises at least one caster wheel. The pedal is configured to be operated to rotate downward to push down the caster mounting plate, and upward to allow the caster mounting plate to be lifted.

A foldable, wheeled cart has a first frame member having an upper portion and a lower portion joined by a pivot bore, a second frame member having an upper portion and a lower portion joined by a second pivot bore, with the first and second pivot bores aligned, a pivot pin passing through the first and the second pivot bores enabling the first frame member and the second frame member to be rotated relative to one another, and a first wheel attached pivotally to the first lower portion of the first frame member and a second wheel attached to the second lower portion of the second frame member. The first frame member and the second frame member may be rotated to create a V-shaped cradle for an object to be carried, which rotation also deploys the first and the second wheels to contact a support surface to carry the object.