U.S. PATENT NUMBER: 7,055,801 B2Chromed ram and dust seals prevent hydraulic contaminationSafety bypass and overload systems prevent cylinder damage and prevent the jack from being used beyond the ASME/PASE load-limiting standardAir pump models can also be operated manuallyIncludes the FASTJACK® feature which raises the jacks lifting saddle to the load with one pump of the "T" handleLocking release lever secures handle in the vertical, 45 degree or horizontal position to lower the load on all models
