Systems and methods for automated maintenance of the top and bottom surfaces or skins of an integrally stiffened hollow structure (e.g., a horizontal stabilizer) using surface crawling vehicles. Each system uses dynamically controlled magnetic coupling to couple an external drive tractor to a pair of passive trailers disposed in the interior of the hollow structure on opposite sides of a vertical structural element. The external drive tractor is also coupled to an external maintenance tool, which the tractor pushes or pulls across the surface skin to perform a maintenance function. The systems allow maintenance operations to be performed on both surface skins without turning the hollow structure over. Each system is modular and can be transported to and easily set up in a building or factory.

A trailer cart. The trailer cart includes a frame having a front end, a rear end and sides. A wheel assembly is attached to the frame. The wheel assembly includes an axle and a pair of wheels. A tongue is attached to and extends from the front end of the frame. The tongue includes a trailer coupler configured to secure to a trailer ball. A winch assembly is attached to the trailer. The winch assembly includes an upright post and a winch attached to the upright post. The winch assembly is attached to at least one of the tongue and the frame and is disposed near the front end of the frame.

Disclosed is a trailer including a bed portion. The bed portion includes a deck, a front extension, and a rear extension. The deck has a first end and a second end. The front extension is slideably engaged with the first end of the deck, and the rear extension is slideably engaged with the second end of the deck. The trailer is a double stretch trailer that is extendable from both ends of the deck. A towing system including a cab and the trailer is also disclosed.

The apparatuses and methods disclosed herein may be towed forwards and backwards by a motor vehicle. Thus, implementations of the transport device disclosed herein may have functions akin to a goose-neck trailer, yet may provide easier, more efficient and/or more cost effective transportation and loading functions over prior art trailer transportation systems. Furthermore, in some implementations, the transport device disclosed herein includes at least three, non-aligned wheels and therefore can function like a cart. Still further, in some implementations, the transport device disclosed herein can have the functions of a wagon, yet still back and maneuver like a trailer. In some implementations, the transport device includes a frame for positioning hay for feeding live stock.

A heavy-load modular vehicle having at least one axle, one steering, and coupling device not only can be coupled with at least one further heavy-load module and/or further transport apparatuses, but optionally also can be pulled out, particularly also telescoped. It has a central longitudinal support having at least one open face side, in which a pull-out support is guided. The metal cover sheet of the loading surface can take on the function of the upper belt of the central longitudinal support and leads to a self-supporting construction. A box-shaped lower belt counteracts twisting or torsions of the vehicle frame in the case of a trough-shaped design. A universal coupling head, particularly a bolt/tab coupling, makes it possible to couple on heavy-load modules having a different width, different tires and/or a different height, without an additional adapter.

A transport trailer and method specifically adapted for safely transporting liquid containing unstabilized drilling waste from more than one waste generator or, multiple waste streams from one or more waste generators. Typically drilling waste is stabilized using binding agents like fly-ash, liquids absorbing pellets or sawdust. In many jurisdictions binding agents are required to stabilize the drill cuttings prior to transport. A sealed transport trailer comprising greater than one container on the transport trailer is described herein which is specifically designed, sized and positioned over a set of axels so as to provide for safe, non-spilling transport, and particular ease of emptying for unstabilized drilling waste.

The apparatuses and methods disclosed herein may be towed forwards and backwards by a motor vehicle. Thus, implementations of the transport device disclosed herein may have functions akin to a goose-neck trailer, yet may provide easier, more efficient and/or more cost effective transportation and loading functions over prior art trailer transportation systems. Furthermore, in some implementations, the transport device disclosed herein includes at least three, non-aligned wheels and therefore can function like a cart. Still further, in some implementations, the transport device disclosed herein can have the functions of a wagon, yet still back and maneuver like a trailer. In some implementations, the transport device includes a frame for positioning hay for feeding live stock.

A high density horsepower (HP) mobile pump system may include an elongated unibody frame having a frame cavity, a front end, a rear end, an elongated roof panel, a front panel, a rear panel, an elongated floor assembly having an upper side and a lower side, an elongated first side panel, and an elongated second side panel. An under carriage structural lattice arrangement may be coupled to the lower side of the floor assembly from the midpoint and extending towards the front end. The under carriage structural lattice arrangement may include a first elongated lattice and a second elongated lattice. At least one wheel and tire assembly may be coupled to the elongated unibody frame. A reciprocating engine may be coupled to the upper side of the elongated floor assembly. A transmission assembly may be coupled to the reciprocating engine, and a pump may be coupled to the transmission assembly.

A trailer for use with a truck has a wheeled chassis having at least one wheeled axle at a rearward end of the wheeled chassis. A body has a cargo deck supported by the wheeled chassis. A camera is mounted to at least one of the wheeled chassis and the body so that a field of view of the camera includes a tractor when the tractor is operatively coupled to the wheeled chassis.

A modular heavy goods vehicle (10) comprises a left vehicle module (12) and a differently designed right vehicle module (14), each of which includes a longitudinal frame part (20, 24) and at least two wheel subassemblies (22, 26), and two transverse frame modules (16, 18) which extend in the direction of the width (B) of the vehicle and the free ends of which are releasably connected to the longitudinal frame parts (20, 24), the length of the transverse frame modules being adjustable.