An assembly for correcting an attitude of at least a selected portion of a structure, where the assembly includes a controller affixed to a structure operatively coupled with one or more jacks operable to change the attitude of the structure; and a remote device configured to communicate wirelessly with the controller to change the attitude of a selected portion of the structure. Also disclosed is a method for adjusting an attitude of a movable structure.

A method for locating an RV in the dark, including extending at least one stabilizing jacks from an RV toward soft ground, engaging at least one phosphorescent jack pad between the at least one jack and the ground, charging the at least one phosphorescent jack pad with daylight, and locating the RV in the dark from the glow of the at least one phosphorescent jack pad.

A method for locating an RV in the dark, including extending at least one stabilizing jacks from an RV toward soft ground, engaging at least one phosphorescent jack pad between the at least one jack and the ground, charging the at least one phosphorescent jack pad with daylight, and locating the RV in the dark from the glow of the at least one phosphorescent jack pad.

A tire replacement apparatus is disclosed that has an electric motor with a drive shaft and a first gear concentrically connected to the drive shaft. The first gear may connect to a symmetrical bolt locking gear array having several bolt locking gears arranged such that each bolt locking gear rotates in the same direction that the first gear rotates. Each bolt locking gear may have a cylindrical hole at its center. The cylindrical hole may be outlined with an inner spiral thread, which connects to a set of power bolts that are outlined in an outer spiral thread which interlocks with the inner spiral thread.

A tire replacement apparatus is disclosed that has an electric motor with a drive shaft and a first gear concentrically connected to the drive shaft. The first gear may connect to a symmetrical bolt locking gear array having several bolt locking gears arranged such that each bolt locking gear rotates in the same direction that the first gear rotates. Each bolt locking gear may have a cylindrical hole at its center. The cylindrical hole may be outlined with an inner spiral thread, which connects to a set of power bolts that are outlined in an outer spiral thread which interlocks with the inner spiral thread.

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; and a mobile device controller communicatively coupled to the tilt sensor and the transmitter and configured to receive signals from the tilt sensor indicating the attitude of the selected surface on which the handheld mobile device is placed.

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; and a mobile device controller communicatively coupled to the tilt sensor and the transmitter and configured to receive signals from the tilt sensor indicating the attitude of the selected surface on which the handheld mobile device is placed.

A hydraulic drop frame trailer for a tow vehicle, the hydraulic drop frame trailer including a trailer frame having two sides and a hitch, a pair of wheels, a first and second frame bracket, a trailer bed mounted over the trailer frame, a first and second pivoting hydraulic cylinder, a plurality of hydraulic hoses, a first and second pivoting arm, an operating station connected to a power supply, a first and second axle-less wheel mount with independent suspension mechanism mounted to the first and second pivoting arm, and a plurality of safety locks, each securing an arm to the trailer frame for locking each rotating arm to the trailer bed during transport.

A watchtower vehicle, including: a top plate engaged with a top of a vehicle; an extendable boom, with a first end thereof engaged with the top plate, wherein the extendable boom is allowed to be inclined from a vertical axis of the top plate within a first angle range; a main sensor mounting unit, engaged with a second end of the extendable boom, for mounting at least one sensor thereon, wherein the main sensor mounting unit is allowed to be inclined from a longitudinal axis of the extendable boom within a second angle range; a sensor module unit including the sensor mounted on the main sensor mounting unit; and a control module for controlling or supporting another module to control at least one of the extendable boom within the first angle range and the main sensor mounting unit within the second angle range.

A watchtower vehicle, including: a top plate engaged with a top of a vehicle; an extendable boom, with a first end thereof engaged with the top plate, wherein the extendable boom is allowed to be inclined from a vertical axis of the top plate within a first angle range; a main sensor mounting unit, engaged with a second end of the extendable boom, for mounting at least one sensor thereon, wherein the main sensor mounting unit is allowed to be inclined from a longitudinal axis of the extendable boom within a second angle range; a sensor module unit including the sensor mounted on the main sensor mounting unit; and a control module for controlling or supporting another module to control at least one of the extendable boom within the first angle range and the main sensor mounting unit within the second angle range.