A mid-mount fire apparatus includes a chassis, a body assembly coupled to the chassis, a front cabin coupled to the chassis forward of the body assembly, a front axle coupled to the chassis, a tandem rear axle coupled to the chassis, and a ladder assembly having a proximal end that is coupled to the chassis rearward of the front cabin and between the front axle and the tandem rear axle. The ladder assembly includes a plurality of ladder sections. The ladder assembly is extensible to a horizontal reach of at least 88 feet. A distal end of the ladder assembly does not extend beyond the rear end of the body assembly when fully retracted.

A lift device includes a lift apparatus for raising and lowering a robotic attachment. The lift apparatus includes a base assembly, the base assembly including a prime mover to rotate one or more wheels. The robotic attachment includes a base, a primary robotic implement, and a secondary robotic implement, each moveable independent of the base. The robotic attachment further includes a stabilizer bar coupled to the base and configured to engage with an external support to provide a stabilizing force to the robotic attachment. At least one of the primary robotic implement and the secondary robotic implement are configured to move one or more end effectors to perform a welding operation, including a weld gun, a weld lead, and a needle scaler. The lift apparatus may also include a control system configured to position the robotic implements in a plurality of preset positions.

A platform assembly includes a work platform including a platform floor and a safety rail extending from the platform floor to a rail height, and a primary sensor unit secured to the work platform and positioned adjacent one of the platform floor and the safety rail. The primary sensor unit is configured to monitor an area from the platform floor or from the safety rail to a space above the rail height and forward and aft of the work platform. The platform assembly enhances protection for an operator from sustained involuntary operation resulting in an impact with an obstruction or structure.

A hydraulic system includes a pump in communication with a fluid reservoir and powered by a motor. A pressure compensator is adapted to adjust a position of a variable displacement mechanism of the pump. A load sensing line is adapted to communicate a highest load sensing pressure from a plurality of valves to the pressure compensator. The pressure compensator adjusts the variable displacement mechanism of the pump based on the highest load sensing pressure for maintaining a constant pressure drop across one or more work ports in each of the plurality of valves. The plurality of valves each include a load sense port having an integrated check valve that includes a metering orifice.

A stabilised machine that comprises; a self-propelled base frame movably supported by a motorised ground support arrangement and provided with an upper support plane; a motorised turntable supported on top of the support plane of the base frame and rotatable with respect to an axis of rotation orthogonal to the support plane; an elevating arm, one first end of which is articulated to the turntable and one second opposed free end of which is adapted to be fixed to an operating arrangement; a plurality of stabilisers each of which is rotatably associated with the base frame about an axis of oscillation lying on a plane orthogonal to the axis of rotation of the turntable, alternatively between a working position, in which it is supported on the ground in addition to or as an alternative to the support arrangement, and a rest position, in which it is raised off the ground; a control system comprising a plurality of sensors, one for each of the stabilisers, wherein each sensor is configured to detect a first parameter indicative of an inclination of the respective stabiliser about its axis of rotation, and an electronic control unit operatively coupled to the plurality of sensors.

Provided is an optimization control method for stable operation of an aerial work platform. For an articulated boom type aerial work platform which does not overturn in three preset operational states, the maximum angle β.sub.max of a folding boom angle β is substituted into a known first stability control function L=g (α, β, S) to obtain an optimized second stability control function L=f (α, S). The three preset operational states include: State I—a folding boom is fully extended at a maximum angle, and a main boom is fully retracted at a maximum angle; State II—the folding boom is fully retracted at a minimum angle, and the main boom is fully retracted at a maximum angle; and State III, the folding boom is fully retracted at a maximum angle, and the main boom is fully retracted horizontally.

The aerial work platform includes: a platform provided with a guardrail and a mechanism for lifting this platform; a desk for controlling the movements of the aerial work platform, one or more virtual-barrier systems for determining that an individual on the platform is close to a part of the guardrail adjacent to the desk and/or is leaning towards the desk, by detecting interference between the individual and the virtual barrier, the system inhibiting at least certain movements of the aerial work platform if it detects interference with the barrier. The virtual-barrier system includes at least one emitter and one receiver of waves, the system detecting interference of an external object with the barrier by the fact that the receiver receives waves emitted by the emitter by reflection off the object that is interfering with the barrier.

A platform assembly includes a work platform including a platform floor and a safety rail extending from the platform floor to a rail height, and a primary sensor unit secured to the work platform and positioned adjacent the platform floor. The primary sensor unit is configured to monitor an area from the platform floor to a space above the rail height and forward and aft of the work platform. The platform assembly enhances protection for an operator from sustained involuntary operation resulting in an impact with an obstruction or structure.

A mid-mount fire apparatus includes a chassis, a body assembly coupled to the chassis, a front cabin coupled to the chassis forward of the body assembly, a front axle coupled to the chassis, a tandem rear axle coupled to the chassis, and a ladder assembly having a proximal end that is coupled to the chassis rearward of the front cabin and between the front axle and the tandem rear axle. The ladder assembly includes a plurality of ladder sections. The ladder assembly is extensible to a horizontal reach of at least 88 feet. A distal end of the ladder assembly does not extend beyond the rear end of the body assembly when fully retracted.

The invention relates to a wheeled vehicle (1) comprising: a chassis (2) carrying an engine (4), a starter (5) of the engine and a device for actuating said starter (5), a control unit, and an activatable/deactivatable device for energising the control unit, said vehicle (1) having an economical operating mode in which, in the activated state of the energising device, the control unit is designed to allow the motor (4) to be stopped without actuation of the energising device, said stoppage being called energised stoppage of the engine (4). The vehicle (1) comprises a memory for storing data relating to the number of starts of the engine (4) and the control unit is designed to allow or prohibit the energised stoppage of the engine (4), in the economical operating mode, according to said stored data.