Technologies are shown for self-elevating platform carts that can transport a load from an initial surface to a destination surface that can be at a higher level, lower level or same level across a horizontal distance and/or barrier. One example extends a front height support to contact the destination surface and extends a rear height support control to contact the initial surface. A main lift is retracted and the system moved forward until main wheels on the main lift contact the destination surface. The main lift is extended and the extensible support beams and height supports are retracted. Another example traverses intermediate surfaces using a vertical stabilizer to stabilize the main lift on surfaces at different levels. The main lift can be the only power lift for the cart.

A device capable of manually raising or lowering a means for transporting a load to assist overcoming obstacles, including an arm automatically articulated about an articulation attached to the means for transporting the load between a first position retracted by the weight of the load and a second position deployed by the action of an elastic element, and a damping system capable of storing and releasing potential energy and of restoring it when the means for transporting the load is raised to overcome an obstacle and capable of absorbing shocks suffered by the transport means while overcoming a difference in level.

A collapsible dolly assembly includes a pair of frames that are each selectively urged between a deployed position and a collapsed position. A pair of rear wheels is rotatably coupled to the frame to roll along a support surface. A pair of front wheels is rotatably coupled to the frame to roll along the support surface. A dolly is hingedly coupled to the frame to support an object thereby facilitating the object to be transported along the support surface. A pair of skid units is movably coupled to an associated one of the frames. Each of the skid units is selectively positioned in a deployed position. In this way each of the skid units frictionally engages a staircase thereby facilitating the object to be urged upwardly and downwardly along the staircase. A braking unit is movably coupled to the frame to selectively engage the staircase when the skid unit is positioned in the deployed position. Thus, the braking unit retains the object at a selected point along the staircase.

Truck-type handling truck with a chassis and a back (40), and a low section, a nose plate attachment (41) and two wheels (71). The truck has a motor unit (60) mounted to the chassis (10) and an electric motor (61) connected to a differential transmission (62) with two lateral output shafts (621) and two track modules (50) each connected to a shaft (531) of the motor unit and mounted to swivel about this shaft independently between a position aligned with the chassis and a deployed position.

Truck-type handling truck with a chassis and a back (40), and a low section, a nose plate attachment (41) and two wheels (71). The truck has a motor unit (60) mounted to the chassis (10) and an electric motor (61) connected to a differential transmission (62) with two lateral output shafts (621) and two track modules (50) each connected to a shaft (531) of the motor unit and mounted to swivel about this shaft independently between a position aligned with the chassis and a deployed position.

A hand-truck frame system includes a main frame, a bed frame, and pair of multi-wheel assembles coupled to the main frame and rotatable to provide improved climbing capabilities over certain terrain, such as stairs. The multi-wheel assemblies can have four wheels radially mounted about respective hubs of the first and second multi-wheel assemblies.

A tool support includes a frame that is configured to support a tool and a powered track supported on the frame. The powered track includes a drive roller, an idler roller, and an endless belt that extends around the drive roller and the idler roller. The tool support also includes a first motor supported on the frame. The first motor is operable to drive the drive roller and rotate the endless belt. The tool support further includes a second motor supported by the frame. The second motor is configured to be coupled to the tool to drive the tool supported on the frame.

A tool support includes a frame that is configured to support a tool and a powered track supported on the frame. The powered track includes a drive roller, an idler roller, and an endless belt that extends around the drive roller and the idler roller. The tool support also includes a first motor supported on the frame. The first motor is operable to drive the drive roller and rotate the endless belt. The tool support further includes a second motor supported by the frame. The second motor is configured to be coupled to the tool to drive the tool supported on the frame.

A system may include a vehicle having a storage area and a guide rail configured to extend from the storage area. The system may further include a robot having a support portion comprising a placement surface and a base. The robot may also include a plurality of descendible wheels. The robot may also further include a plurality of legs, each connecting the support portion to one of the plurality of descendible wheels.

A system may include a vehicle having a storage area and a guide rail configured to extend from the storage area. The system may further include a robot having a support portion comprising a placement surface and a base. The robot may also include a plurality of descendible wheels. The robot may also further include a plurality of legs, each connecting the support portion to one of the plurality of descendible wheels.