Abstract: A lift assembly installable on a vehicle. The lift assembly includes a support structure securable to the vehicle, a pair of parallel vertically extending geared tracks and a vertically moveable drive assembly. The drive assembly includes (a) a mounting structure; (b) a selectively reversible motor; (c) a pair of gears; and (d) a moveable first tread. The gears are engaged with the tracks and rotatably supported on the mounting structure. The gears are also drivingly coupled with the motor wherein operation of the motor selectively raises and lowers the mounting structure relative to the support structure. The moveable first tread is secured to the mounting structure and is adapted to support an operator whereby raising and lowering the mounting structure raises and lowers an operator positioned on the first tread. In some embodiments, the lift assembly includes water-resistant foot-operable switches to control the raising and lowering of the mounting structure.

Abstract: A lift assembly installable on a vehicle. The lift assembly includes a support structure securable to the vehicle, a pair of parallel vertically extending geared tracks and a vertically moveable drive assembly. The drive assembly includes (a) a mounting structure; (b) a selectively reversible motor; (c) a pair of gears; and (d) a moveable first tread. The gears are engaged with the tracks and rotatably supported on the mounting structure. The gears are also drivingly coupled with the motor wherein operation of the motor selectively raises and lowers the mounting structure relative to the support structure. The moveable first tread is secured to the mounting structure and is adapted to support an operator whereby raising and lowering the mounting structure raises and lowers an operator positioned on the first tread. In some embodiments, the lift assembly includes water-resistant foot-operable switches to control the raising and lowering of the mounting structure.