A stroller is provided with the ability to removably couple and decouple a seat from the stroller as needed. The stroller can include a stroller frame. The stroller can also include one or more front wheels attached to the stroller frame and one or more rear wheels attached to the stroller frame. The stroller can also include a first seat couple to the stroller frame. The stroller can include first and second seat attachment housings. Each of the seat attachment housings can include a cavity for receiving a corresponding one of the first and second seat attachment adapters. Each of the seat attachment housings can also include a door or cover to prevent access to the respective cavity when not in use. The seat attachment adapters can be coupled to the respective seat attachment housings and a second seat can be coupled to the seat attachment adapters.

A foldable bicycle trailer has at least two main frames (1,2) disposed symmetrically about a central plane. These are connected by crossbars. The frames (1,2) stand on wheels (21,22) or on any other movable interface on its either side. The crossbars comprise a first element which is substantially flat in unfolded state, having at least two parallel foldable arms (9a, 10a) and a second element which is substantially upright in unfolded stage, also having at least two parallel foldable arms (11a, 12a). The foldable arms (9a, 10a, 11a, 12a) of each of first and second elements are connected by hinges (5, 6, 7,8) for connecting the foldable segments of each foldable arm.

Implementations of bicycle trailers may include a first end and a second end, the second end opposite the first end, a first plurality of latches coupled to the first end, and a second plurality of latches coupled to the second end. The first plurality of latches may be configured to secure a rear-facing child's car seat facing the first end. The second plurality of latches may be configured to secure the rear-facing child's car seat facing the second end. The second plurality of latches may be configured to secure a front-facing child's car seat facing the first end.

A stroller is provided with the ability to removably couple and decouple a seat from the stroller as needed. The stroller can include a stroller frame. The stroller can also include one or more front wheels attached to the stroller frame and one or more rear wheels attached to the stroller frame. The stroller can also include a first seat coupled to the stroller frame. The stroller can include first and second seat attachment housings. Each of the seat attachment housings can include a cavity for receiving a corresponding one of the first and second seat attachment adapters. Each of the seat attachment housings can also include a door cover to prevent access to the respective cavity when not in use. The seat attachment adapters can be coupled to the respective seat attachment housings and a second seat can be coupled to the seat attachment adapters.

A child trailer has a bottom frame and a side frame, and a folding joint is disposed on the tail support of the trailer. A front end of the bottom frame is rotationally connected with a front end of the side frame. A top support rod is fixed at a rear end of the side frame. Left and right ends of the top support rod are respectively connected with an upper-section tail support rod rotating around an axis thereof. A tail end of the upper-section tail support rod is connected with a folding joint. The other end of the folding joint is connected with a lower-section tail support rod. A rear end of the bottom frame is connected with a tail rack rotating around a shaft parallel to the axis of the top support rod.

A mobile palm oil processing machine that is capable of being towed by a light-duty vehicle such as a motorcycle and that comprises a small-scale palm oil press mounted on a trailer along with a diesel engine that is coupled to the palm oil press via a drive shaft. The trailer further comprises a removable cover capable of being deployed as a shelter roof or alternatively as a ramp when the mobile palm oil processing machine is deployed on site. The trailer further comprises the capability for self-propulsion that allows the trailer to ascend and descend steep inclines and to assist the light-duty vehicle in self extrication when the trailer is stuck, such as on a muddy or unimproved road.

A foldable bicycle trailer has at least two main frames (1,2) disposed symmetrically about a central plane. These are connected by crossbars. The frames (1,2) stand on wheels (21,22) or on any other movable interface on its either side. The crossbars comprise a first element which is substantially flat in unfolded state, having at least two parallel foldable arms (9a, 10a) and a second element which is substantially upright in unfolded stage, also having at least two parallel foldable arms (11a, 12a). The foldable arms (9a, 10a 11a 12a) of each of first and second elements are connected by hinges (5, 6, 7,8) for connecting the foldable segments of each foldable arm.

A trailer-coupling assembly is described for securing a trailer to a two-wheel vehicle. The trailer-coupling assembly is rigidly fixed to a rear-wheel frame of a two-wheel vehicle and the utility bed of a trailer. The trailer-coupling assembly is comprised of three joints that each rotate about three separate cardinal axes, permitting the trailer to navigate rough terrain without transferring rotational loading to the two-wheel vehicle. Each joint is configured to rotate at least 90 degrees in a clockwise direction and an anti-clockwise direction about a cardinal axis, providing the trailer-coupling assembly with flexibility to navigate the two-wheel vehicle and trailer over various grades of rough terrain.

This disclosure concerns a propulsion and load distribution system for a pedal actuated vehicle. More specifically, this disclosure is directed to an electrically powered frame, trailer, vehicle, trailer, cart, and/or cycle coupled to at least one motorized wheel operably connected thereto. In some embodiments, the propulsion system can be operably associated with a load distribution system comprising a rocker arm and a spring that are configured to be associated with a frame having an axle or to which an axle can be mounted.

A vehicle mounted multi tricycle carrier with tilting carrier platforms that enable loading multiple tricycle to the carrier without a person hand lifting the tricycle from the ground. The carrier incorporates a lifting boom accessory. The lifting boom is attached to the lower carrier structure and a second platform added to the lift boom allowing two tricycles to be carried.