US Patent 10315628 Semitrailer landing gear controller assembly

A semitrailer landing gear controller assembly for automating the extension and retraction of a semitrailer landing gear using an external input of pressurized air. The device includes a primary member designed to receive and rotate a removeable secondary member installed over a turning axle for a semitrailer landing gear, where rotation of the turning axle corresponds to the extension or retraction of a semitrailer landing gear depending on the direction of rotation. The primary member further including a turbine designed to drive rotation of the secondary member with the force of pressurized air obtained from an external input of pressurized air, like the supply line from a semitrailer.