fjærpiston
A fjærpiston, commonly translated as a spring-loaded piston, is a piston assembly in which a compression spring provides a restoring force to return the piston to a predefined position after actuation. The arrangement is used to create a known rest state, preload movement, or fail-safe return in various fluid-power or mechanical systems.
In typical constructions, a cylinder houses a piston and a spring. When external pressure (air or fluid)
Variants and related concepts include spring-return (or spring-actuated) cylinders in pneumatic and hydraulic systems, where the
Applications span pneumatic actuators and valve operators, where a spring return ensures a safe or known position