Adaptive portable lifting device

Adjustable height leveling leg

Apparatus for supporting the trailer of a tractor-semitrailer

Apparatus for supporting the trailer of a tractor-semitrailer

Automated rail jack

Automatic jacking system for an automotive vehicle

Built-in power jack

Center motor driven stabilizer jack

Combination valve and internal spring leg assembly

Constant mesh gear box landing gear

Conveniently attached hydraulic trailer jack

Drop foot jack

Dual hydraulic lifts

Easy jack

Electrical lift for trailers

Electromagnetic lift apparatus

Elevator air jack

Extendible and retractable leg with internal spring

Folding trailer jack stand

Gear box for rack and pinion jack and method of making same