A lift device includes a guardrail assembly pivotally coupled to a mast assembly and having a guardrail and a door pivotally coupled to a free end of the guardrail by an automatic door hinge assembly. The automatic door hinge assembly includes a hinge rod rotationally fixed relative to the guardrail and including a plurality of helical protrusions, a hinge channel extending through the door and including a plurality of helical recesses, and a hinge rod spring biased between the guardrail and the door and configured to generate a biasing force on the door that biases the door toward a closed position. Each of the plurality of helical protrusions is received within a corresponding one of the plurality of helical recesses.

Vehicles may be composed of a relatively few number of modules that are assembled together during a final assembly process. An example vehicle may include a body module, a first drive module coupled to a first end of the body module, and a second drive module coupled to a second end of the body module. One or both of the drive modules may include a pair of wheels, a battery, an electric drive motor, and/or a heating ventilation and air conditioning (HVAC) system. One or both of the drive modules may also include a crash structure to absorb impacts. If a component of a drive module fails or is damaged, the drive module can be quickly and easily replaced with a new drive module, minimizing vehicle down time.

Vehicles may be composed of a relatively few number of modules that are assembled together during a final assembly process. An example vehicle may include a body module, a first drive module coupled to a first end of the body module, and a second drive module coupled to a second end of the body module. One or both of the drive modules may include a pair of wheels, a battery, an electric drive motor, and/or a heating ventilation and air conditioning (HVAC) system. One or both of the drive modules may also include a crash structure to absorb impacts. If a component of a drive module fails or is damaged, the drive module can be quickly and easily replaced with a new drive module, minimizing vehicle down time.

Vehicles may be composed of a relatively few number of modules that are assembled together during a final assembly process. An example vehicle may include a body module, a first drive module coupled to a first end of the body module, and a second drive module coupled to a second end of the body module. One or both of the drive modules may include a pair of wheels, a battery, an electric drive motor, and/or a heating ventilation and air conditioning (HVAC) system. One or both of the drive modules may also include a crash structure to absorb impacts. If a component of a drive module fails or is damaged, the drive module can be quickly and easily replaced with a new drive module, minimizing vehicle down time.

A system and method for remotely controlling loading dock components is disclosed that includes a distribution center having at least one dock station for exchanging materials and a dock component configured to in at least two operational states. An actuator is included that is configured to change the operational state of the dock component in response to an activation signal. A mobile remote control is configured to generate the activation signal to cause the actuator to change the operational state of the dock component and at least one predefined non-activation zone is included such that changing of operational state of the dock component is inhibited when the mobile remote control is located within the at least one predefined non-activation zone.

A system and method for remotely controlling loading dock components is disclosed that includes a distribution center having at least one dock station for exchanging materials and a dock component configured to in at least two operational states. An actuator is included that is configured to change the operational state of the dock component in response to an activation signal. A mobile remote control is configured to generate the activation signal to cause the actuator to change the operational state of the dock component and at least one predefined non-activation zone is included such that changing of operational state of the dock component is inhibited when the mobile remote control is located within the at least one predefined non-activation zone.

A radial conveyor has a multi-mode wheel assembly located at each side of its chassis. Each wheel assembly is movable with respect to the chassis between a non-deployed state and a deployed state. In the non-deployed state the wheel assemblies support transport of the radial conveyor. In the deployed state the wheel assemblies support radial movement of the conveyor. The wheel assemblies can also be raised and lowered with respect to the chassis. This allows the ground clearance of the chassis, and the overall height of the radial conveyor to be adjusted, as well as facilitating transition between operating modes.

A radial conveyor has a multi-mode wheel assembly located at each side of its chassis. Each wheel assembly is movable with respect to the chassis between a non-deployed state and a deployed state. In the non-deployed state the wheel assemblies support transport of the radial conveyor. In the deployed state the wheel assemblies support radial movement of the conveyor. The wheel assemblies can also be raised and lowered with respect to the chassis. This allows the ground clearance of the chassis, and the overall height of the radial conveyor to be adjusted, as well as facilitating transition between operating modes.

A dynamic jack reference control system may include a tilt sensor operatively associated with the vehicle so that the tilt sensor senses a tilt angle of the vehicle. A processor operatively connected to the tilt sensor produces a jack reference value based on the tilt angle of the vehicle. A speed controller operatively associated with the processor extends the at least one jack on the vehicle at a speed that is related to the jack reference value.

A dynamic jack reference control system may include a tilt sensor operatively associated with the vehicle so that the tilt sensor senses a tilt angle of the vehicle. A processor operatively connected to the tilt sensor produces a jack reference value based on the tilt angle of the vehicle. A speed controller operatively associated with the processor extends the at least one jack on the vehicle at a speed that is related to the jack reference value.