piston
grabcad
A piston serves various applications including reciprocating engines, pumps, gas compressors, and pneumatic cylinders. It's a moving part within a cylinder, made gas-tight by rings. In engines, it converts gas expansion force into crankshaft motion via a rod; in pumps, it transfers crankshaft force to compress or eject fluid. Some engines also utilize the piston as a valve, opening and closing cylinder ports.
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