Jack
device · 1850 · Industrial Revolution
A device for lifting heavy loads a short height (screw or hydraulic).
What it is made of
- Hydraulic cylinder — has part. A working cylinder.
- Piston pump — has part. A hand plunger pump.
- Check valve — has part. Check valves.
- Lever — has part. The pump handle.
Principles and materials it uses
- Screw — uses. A screw jack.
- Hydraulics (Pascal’s law) — uses. A hydraulic jack.
- Cast iron — is made of. A jack is cast iron.