dashpot

Noun

Meaning

A pneumatic or hydraulic cushion for a falling weight, as in the valve gear of a steam engine, to prevent shock.

Source: Webster's dictionary

dumper device buffer cushion bumper damper absorbent dampening absorber extinguisher discouragement cushioning shock absorber dampener damping

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dashtop

A dashpot is a piston filled with fluid that is allowed to escape slowly; both air-filled and oil-filled dashpots are used. Source: Internet

For a slightly longer (up to a minute) delay, a dashpot is used. Source: Internet