Pneumatic jack

摘要

A relatively low profile pneumatic jack comprising a bellows made from a flexible member having at least one convolution for lifting heavy objects, such as vehicles. The bellows is located between a lift member that abuts the object to be lifted and a base member which abuts the surface from which the object is being lifted (i.e., the ground). A top plate and a bottom plate connect to the bellows and the lift and base members to form an air-tight chamber within the bellows. An inlet valve is connected to the chamber to allow the introduction of pressurized air in the chamber. A valve assembly having safety systems therein to prevent overfilling of the jack is disposed between the supply of pressurized air and the inlet valve. A safety system inside the chamber further prevents overfilling of the jack.