A feeder vessel for the onshore-to-offshore transport of elongate wind turbine objects with a motion compensating carrier assembly having a motion compensated platform for receiving and retaining the elongate object, and a motion compensation mechanism. The motion compensation mechanism includes extendable actuators which passively compensate motions of the platform out of a neutral position, and winches driving carrier cables such that traction by the respective carrier winch counteracts an extension of at least one of the carrier actuators. The winches are embodied as active motion compensation winches to compensate movements of the platform.

A vehicle power supply device is provided. The vehicle power supply device includes: a fixed base; a scissor-fork lifting mechanism, where the scissor-fork lifting mechanism is mounted on the fixed base; a power supply head, where the power supply head is mounted on the scissor-fork lifting mechanism and is driven by the scissor-fork lifting mechanism to ascend or descend; and a drive device, where the drive device includes a drive unit and a transmission unit configured to convert rotational movement into linear movement. The drive unit and the transmission unit are stacked along a lifting direction of the scissor-fork lifting mechanism. The drive unit is connected with the scissor-fork lifting mechanism by the transmission unit to drive the scissor-fork lifting mechanism to ascend or descend.

A vehicle power supply device is provided. The vehicle power supply device includes: a fixed base; a scissor-fork lifting mechanism, where the scissor-fork lifting mechanism is mounted on the fixed base; a power supply head, where the power supply head is mounted on the scissor-fork lifting mechanism and is driven by the scissor-fork lifting mechanism to ascend or descend; and a drive device, where the drive device includes a drive unit and a transmission unit configured to convert rotational movement into linear movement. The drive unit and the transmission unit are stacked along a lifting direction of the scissor-fork lifting mechanism. The drive unit is connected with the scissor-fork lifting mechanism by the transmission unit to drive the scissor-fork lifting mechanism to ascend or descend.

A lift carrier (10) includes: a carrier frame that is inserted under a vehicle to be transported; a lifting mechanism that lifts and lowers the carrier frame to lift and lower the vehicle; and a carrier body configured to move the carrier frame. The carrier frame includes a rear end frame that includes a pair of arm fixing plates provided so as to protrude outward in a lateral direction of the vehicle from lower surfaces of the side members. The top plate is fixed to the rear end frame, fixes a plurality of rear end arms at such positions that the rear end arms are sandwiched between the top plate and the arm fixing plates, and fixes an upper end face of a lifting unit that is the lifting mechanism.

A hydraulic control system for linear actuation that includes an electric motor connected to a hydraulic pump and a hydraulic cylinder connected to the pump by a first flow line. A pressure transducer, a pressure control valve, and a check valve are connected to the first flow line between the pump and the cylinder and a tank is connected to the pump by a second flow line and the cylinder by a return line. A control valve is connected between the first flow line and the return line.

A hydraulic control system for linear actuation that includes an electric motor connected to a hydraulic pump and a hydraulic cylinder connected to the pump by a first flow line. A pressure transducer, a pressure control valve, and a check valve are connected to the first flow line between the pump and the cylinder and a tank is connected to the pump by a second flow line and the cylinder by a return line. A control valve is connected between the first flow line and the return line.

A vehicle transporting device includes a bogie frame, a total of eight arms, upper surface plates, and arm driving units. Two arms in a longitudinal direction of the bogie frame of the total of eight arms are paired with each other to support tires. The upper surface plates extend in a width direction of the bogie frame to support the arms. At least six arm driving units are provided on the bogie frame to individually drive at least six arms. Base end portions of pivoting arms are pivotably supported by the upper surface plates in outer peripheral regions of the upper surface plates. Tip portions of the pivoting arms are located outside the upper surface plates. One ends of the arm driving units are attached partway through the pivoting arms. The other ends of the arm driving units are located outside the bogie frame.

A mobile lift apparatus includes a mobile base frame with sets of height adjustable, triple caster units, frame mounted floor brakes, a load deck, scissor linkage engaged between the base frame and the load deck, and a load table movable on the load deck. An actuator is engaged with the scissor linkage to extend and retract the scissor linkage.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a steerable rear wheel assembly, a steerable front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position where the rear wheel assembly and the front wheel assembly are positioned to equally support the undercarriage chassis.

A trailer for towing by a power vehicle is provided and generally includes a frame and a tandem wheel assembly. The frame forms an undercarriage chassis which the tandem wheel assembly is positioned there under. The undercarriage chassis includes a steerable rear wheel assembly, a steerable front wheel assembly, and an extension assembly moving the front wheel assembly between trailing position and a self-propelled position where the rear wheel assembly and the front wheel assembly are positioned to equally support the undercarriage chassis.