What is an air bag jack and how does it work fundamentally?

An Air Bag Jack,also known as a pneumatic lifting bag or air jack,is a portable,low-profile hydraulic rescue tool used for lifting heavy objects.Its core component is a high-strength,reinforced rubber or elastomer bag.It operates on a simple principle of pneumatic pressure.The bag is connected via a high-pressure hose to a source of compressed air,such as a vehicle's exhaust(via a special adapter),a compressed air tank(SCBA bottle),or a portable air compressor.As this compressed air is fed into the sealed bag,it inflates,expanding vertically.The immense pressure exerted by the air against the internal surfaces of the bag translates into a powerful lifting force.This force pushes against the object placed on top of it,gradually raising it as the bag continues to inflate.Its key advantage lies in its ability to lift immense weights from a completely flat position,making it indispensable in scenarios like vehicle extrication or industrial lifting where space is extremely limited and traditional jacks cannot be positioned.