A vacuum tank semi-trailer having a horizontal tank with front and rear tank heads. A front cantilevered frame is welded to the front tank head and has a fifth wheel hitch and a pair of landing legs fixed thereto. A rear cantilevered frame is welded to the rear tank head, and has an axle assembly sprung therefrom. A lower center of gravity is realized by keeping the front a rear frames smaller than the diameter of the tank. A fill pipe having an upwardly sloped portion to clear the axle assembly is coupled to the tank and presents a fill connection at the rear of the rear frame in a protected manner.

A vacuum tank semi-trailer having a horizontal tank with front and rear tank heads. A front cantilevered frame is welded to the front tank head and has a fifth wheel hitch and a pair of landing legs fixed thereto. A rear cantilevered frame is welded to the rear tank head, and has an axle assembly sprung therefrom. A lower center of gravity is realized by keeping the front a rear frames smaller than the diameter of the tank. A fill pipe having an upwardly sloped portion to clear the axle assembly is coupled to the tank and presents a fill connection at the rear of the rear frame in a protected manner.

This disclosure teaches a device and a system having a gear reduction ratio for use with power tools to mechanically connect to drive shafts of trailer jacks. The device enables the power tools to extend or retract the legs of the trailer jacks in an efficient and easy manner. The device may be installed or retrofitted to existing high capacity trailers or integrated with newly manufactured trailers. In some embodiments, the device has a first interface, a gear train or an equivalent torque magnification mechanism, and a second interface. The first interface enables a power tool or a hand tool to rotationally engage the gear train. The second interface enables the output torque from the gear train to apply to rotate a shaft to raise and/or lower one or more trailer jacks. A power drill can thus couple with the first interface to lift or lower the trailer.

A system and method for leveling a selected surface of a structure. The system includes a handheld mobile device and a platform leveling assembly (PLA) supportable on a structure to be leveled. The PLA includes a PLA controller and a PLA receiver communicatively coupled with the PLA controller. The handheld mobile device includes a tilt sensor configured to sense an attitude of a selected surface on which the handheld mobile device is placed; an output device configured to provide an indication to a user; an input device configured to receive input from the user; a transmitter configured to send wireless signals to the PLA receiver; and a mobile device controller communicatively coupled to the tilt sensor, the output device, the input device, and the transmitter and configured to cause the output device to provide an indication of the sensed attitude of the selected surface.

A system and method for leveling a selected surface of a structure. The system includes a handheld mobile device and a platform leveling assembly (PLA) supportable on a structure to be leveled. The PLA includes a PLA controller and a PLA receiver communicatively coupled with the PLA controller. The handheld mobile device includes a tilt sensor configured to sense an attitude of a selected surface on which the handheld mobile device is placed; an output device configured to provide an indication to a user; an input device configured to receive input from the user; a transmitter configured to send wireless signals to the PLA receiver; and a mobile device controller communicatively coupled to the tilt sensor, the output device, the input device, and the transmitter and configured to cause the output device to provide an indication of the sensed attitude of the selected surface.

A trailer stabilizing device for stabilizing a parked freight trailer, the trailer stabilizing device comprising a frame separate from the support frame of the parked freight trailer, the stabilizing device frame having mounted thereto wheels and a hitch, the stabilizing device including a repositionable jack.

A trailer stabilizing device for stabilizing a parked freight trailer, the trailer stabilizing device comprising a frame separate from the support frame of the parked freight trailer, the stabilizing device frame having mounted thereto wheels and a hitch, the stabilizing device including a repositionable jack.

An outrigger pad assembly includes a base having a bottom surface for engaging an underlying support surface and a top surface opposite to the bottom surface, a force sensor mounted to the base, and an interface body. The interface body includes a lower cavity at least partially defined by a first inner sidewall, an upper cavity at least partially defined by a second inner sidewall, and a coupling body having a latch configured for selective with an outrigger jack. The force sensor is disposed in the lower cavity in sliding contact with the first inner sidewall such that the interface body is movable relative to the force sensor. The outrigger pad assembly may be part of an outrigger assembly of a lifting vehicle.

An outrigger pad assembly includes a base having a bottom surface for engaging an underlying support surface and a top surface opposite to the bottom surface, a force sensor mounted to the base, and an interface body. The interface body includes a lower cavity at least partially defined by a first inner sidewall, an upper cavity at least partially defined by a second inner sidewall, and a coupling body having a latch configured for selective with an outrigger jack. The force sensor is disposed in the lower cavity in sliding contact with the first inner sidewall such that the interface body is movable relative to the force sensor. The outrigger pad assembly may be part of an outrigger assembly of a lifting vehicle.

A vehicle leveling system includes a jack adapted to be mounted to a vehicle frame without modifying the vehicle frame. In a particular embodiment, the jack includes a first bracket adapted to urge against the bottom and side surfaces of a member of the frame and configured to be fastened to a member of the frame through a manufacturer-provided aperture in the frame. The jack additionally includes a second bracket to couple the first bracket to the jack. In a more particular embodiment, the first bracket includes a horizontal adjustment feature, and the second bracket includes a vertical adjustment feature.