An articulated coupler permits vertical displacement of a towed vehicle relative to a towing vehicle while preventing lateral or horizontal displacement of the towed vehicle relative to the towing vehicle. Multiple linkage arms provide coupling for special configuration towed vehicles such as short wheel-mounted lifts that experience torsional forces due to the presence and absence of loads on the lift.

A steering system for a trailer is disclosed. A drawbar is attached to an elongated slide, with the slide attached to the trailer for rotation about a pivot axis. A carriage is mounted for movement along the slide and between ends of the slide. At least one control rod extends between the carriage and a steered wheel of the trailer. With the carriage positioned to one side of the pivot axis, the trailer wheels are steered in the direction of sideways towbar displacement when towed, and with the carriage positioned to the other side of the pivot axis, the trailer wheels are steered in the opposite direction of sideways towbar displacement when backed. An electrical, hydraulic, pneumatic or manual actuator may be used to move and position the carriage on the slide.

An improved articulated heavy haul trailer combination comprises a trailing accessory vehicle such as a booster coupled to a main trailer by a coupling. The coupling includes a horizontal hinge, a vertical hinge that allows the trailing accessory vehicle to yaw in a horizontal plane, a spreader extending between the hinges and a hydraulic piston and cylinder. A turn sensor mounted on said combination detects yawing, and a controller reduces the piston and cylinder's downward biasing force on the coupling.

A trailer to vehicle laterally stable hitching mechanism wherein an attaching plate of the trailer vertically and laterally self-aligns into a receiving plate of the vehicle establishing the trailer as an operational extension of the vehicle.

A towing system comprises a bar, a first attachment device arranged at a first end of the bar, the first attachment device being able to attach the towing system to a towing vehicle, a second attachment device arranged at a second end of the bar, the second attachment device being able to attach the towing system to a travelling machine to be towed, the second attachment device comprising a fork able to hold at least one wheel of the travelling machine, the fork having two longitudinal members between which at least one wheel of the travelling machine is able to be received, a separation device able to modify the spacing between the two longitudinal members and a holding device able to hold the wheel between the two longitudinal members.

A trolley that couples to a tow saddle is provided. The trolley includes an upper plate and a lower plate. The upper and lower plate are secured against a rear portion of a tow saddle. One or more support bars are coupled to the upper plate. The bars provide structural support for the upper plate and deflect a chain that transits apertures in the upper plate.

A vehicle front-end assembly having a vehicle frame, a first tow hook and a skid plate. The vehicle frame has a first front side member with a front-end portion. The first tow hook has a forward portion and a rearward portion. The rearward portion of the first tow hook is attached the front-end portion of the first front side member by a first mechanical fastener. The skid plate has a main section, a first attachment flange extending from a first lateral side of the main section, the first attachment flange being fixed to the first front side member by the first mechanical fastener.

A trolley that couples to a tow saddle is provided. The trolley includes an upper plate and a lower plate. The upper and lower plate are secured against a rear portion of a tow saddle. One or more support bars are coupled to the upper plate. The bars provide structural support for the upper plate and deflect a chain that transits apertures in the upper plate.

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.

A vehicle front-end assembly includes a vehicle frame, a first tow hook and a skid plate. The first tow hook has a forward portion and a rearward portion. The rearward portion of the first tow hook is attached a front-end portion of a first front side member of the vehicle frame by a mechanical fastener. The skid plate has a main section and a first attachment flange that extends from the main section. The first attachment flange is attached to the front-end portion of the first front side member by the mechanical fastener. The first attachment flange has a first alignment projecting surface. During installation of the skid plate to the first front side member, the first alignment projection contacts a surface of the rearward portion of the first tow hook moving the first tow hook into alignment with the first front side member.