Early jacks were of the screw jack variety. Turn the crank and the threads come out further and further. At the top of the threaded area is a flat cast iron pad that what you're jacking up rests on. It doesn't rotate like the rest of the threaded area.
Would you believe if I told you that hydraulic jacks were first patented in 1838? Yeah, they're that old. Pneumatic jacks came next, switching out the compressed oil of a hydraulic jack for compressed air. Throw that compressed air into a bag and you get a lifting bag. The great thing about lifting bags is when they're used underwater they can lift sunken treasure.
If you're not trying to lift a boat from the bottom of the sea and instead just want to change a tire, car jacks get the wheel off the car, but you need a tire changer to change the tire. Manual tire changers will do the trick, you may want the best buy automotive equipment tire changers. They're great for someone who manages a garage or a service station.
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